Keysight N9038A Service Manual
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Keysight N9038A Service Manual

Mxe emi receiver
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Table of Contents

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Keysight N9038A
MXE EMI Receiver
Notice: This document contains references to Agilent.
Please note that Agilent's Test and Measurement
business has become Keysight Technologies. For
more information, go to www.keysight.com.
Service Guide

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Summary of Contents for Keysight N9038A

  • Page 1 Keysight N9038A MXE EMI Receiver Notice: This document contains references to Agilent. Please note that Agilent’s Test and Measurement business has become Keysight Technologies. For more information, go to www.keysight.com. Service Guide...
  • Page 2 Notices reproduce, release, perform, CONTAINED HEREIN. SHOULD KEYSIGHT AND THE USER HAVE A display, or disclose commercial SEPARATE WRITTEN AGREEMENT computer software or © Keysight Technologies, Inc. WITH WARRANTY TERMS commercial computer software 2013-2019 COVERING THE MATERIAL IN THIS documentation. No additional...
  • Page 3 URLs, according to the name of your product: http://www.keysight.com/find/mxe To receive the latest updates by email, subscribe to Keysight Email Updates at the following URL: http://www.keysight.com/find/MyKeysight Information on preventing instrument damage can be found at: www.keysight.com/find/PreventingInstrumentRepair...

  • Page 5: Table Of Contents

    Instrument Hangs at the Keysight Splash Screen ........
  • Page 6 Contents Verify Video Signal Path Integrity ............58 Video Controller / LCD Troubleshooting.
  • Page 7 Contents 5. RF Preselector Section What You Will Find in This Chapter ............. 163 RF Preselector Section Purpose .
  • Page 8 Contents A12 YTF Preselector Control - (Option 508 & 526 only)......... . 288 A12 YTF Preselector Alignment .
  • Page 9 Contents 22.5 MHz IF Signal Processing ............. 344 10 MHz Reference Output.
  • Page 10 Contents A7 Midplane Board Assembly Troubleshooting ........... . 375 Instrument Power Supply LEDs and Test Points .
  • Page 11 N9038A RF Input Option 503, 508, 526 Block Diagram ....... .
  • Page 12 Contents RF Switch/High Band Preamp Assembly - Option 503, 508, & 526 ....... . 540 YTF Preselector - Option 503, 508, &...
  • Page 13 Contents Replacement ................594 CPU Assembly.
  • Page 14 Contents 22. Tests What You Will Find in This Chapter ............. 665 Functional Test Versus Performance Verification.
  • Page 15 Contents Initial Setup ................746 Band A Testing.
  • Page 16 Contents...

  • Page 17: Overview

    What You Will Find in This Chapter This chapter provides overview information on your spectrum analyzer. The following sections are found in this chapter: Keysight MXE EMI Receiver Overview on page 20 Instrument Option Descriptions on page 21 Before You Start Troubleshooting on page 23...

  • Page 18: Service Manual Revision History

    — Added support for Option 544 - 20 Hz to 44 GHz Frequency Range — Incorporate updates for previous revision — Miscellaneous minor updates N9038-90021 — Print Date June 2013 — Instrument serial number prefix MY/SG5322 Keysight N9038A MXE Service Guide...
  • Page 19 — Added support for Option LSN - External LISN Control — Added support for LED backlit display — Incorporate updates for previous revision — Miscellaneous minor updates N9038-90001 — Print Date May 2011 — Initial revision Keysight N9038A MXE Service Guide...

  • Page 20: Keysight Mxe Emi Receiver Overview

    Hardware upgrades may require installation of optional hardware, and often require readjustment and verification of the hardware option. Virus Information Keysight Technologies does not load anti-virus software into the MXE. It is the customers responsibility to install anti-virus software. Keysight N9038A MXE Service Guide...

  • Page 21: Instrument Option Descriptions

    Included on all units Noise Floor Extension Included on all units Precision Frequency Reference Included on all units Preamp, 100 kHz to 3.6 GHz Included with Option 503 Preamp, 100 kHz to 8.4 GHz Included with Option 508 Keysight N9038A MXE Service Guide...
  • Page 22 Preamp, 100 kHz to 44 GHz Included with Option 544 Real-Time Spectrum Analysis Time Domain Spectrum Y-Axis Screen Video (rear panel Analog Out connector) a. Does not appear in option listing of instrument b. Standard as of Serial Prefix MY/SG5322 Keysight N9038A MXE Service Guide...

  • Page 23: Before You Start Troubleshooting

    — Read the general safety considerations below. — Read the ESD information below. — Familiarize yourself with the troubleshooting information in Chapter 2, “Boot Up and Initialization.”, and how it relates to information on troubleshooting the other assemblies. Keysight N9038A MXE Service Guide...

  • Page 24: General Safety Considerations

    To prevent electrical shock, disconnect the analyzer from mains before cleaning. Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally. Keysight N9038A MXE Service Guide...
  • Page 25 Always use the three-prong ac power cord supplied with this product. Failure to ensure adequate earth grounding by not using this cord may cause product damage. This instrument has an autoranging line voltage input; be sure the supply voltage is within the specified range. Keysight N9038A MXE Service Guide...

  • Page 26: Esd Information

    1 megohm of isolation from ground. These techniques for a static-safe workstation should not be used when working on circuitry with a voltage potential greater than 500 volts. Figure 1-1 Example of a Static-Safe Workstation Keysight N9038A MXE Service Guide...

  • Page 27: Handling Of Electronic Components And Esd

    For Additional Information about ESD For more information about preventing ESD damage, contact the Electrical Over Stress/Electrostatic Discharge (EOS/ESD) Association, Inc. The ESD standards developed by this agency are sanctioned by the American National Standards Institute (ANSI). Keysight N9038A MXE Service Guide...

  • Page 28: Service Equipment You Will Need

    Nut Driver 5/16 inch Nut Driver 9/16 inch Open-End Wrench 5/16 inch Torque Driver - Adjustable Multi Bit Torque Wrench - 10 inch-lbs 5/16 inch TORX Driver TORX Driver TORX Driver T-10 TORX Driver T-20 Keysight N9038A MXE Service Guide...

  • Page 29: Calibration Application Software

    Overview Service Equipment You Will Need Calibration Application Software Information regarding the Keysight MXE EMI Receiver Calibration Application Software can be found at the following web site: www.keysight.com/find/calibrationsoftware Keysight N9038A MXE Service Guide...

  • Page 30: Front End Controller Troubleshooting Kit

    A short Type-M male to BNC male cable has been created for this purpose, It is recommended that two of these be available for troubleshooting the instrument. The part number of this cable is N9039-60034. Keysight N9038A MXE Service Guide...

  • Page 31: After An Instrument Repair

    Keysight office listed in Table 1-1. In any correspondence or telephone conversations, refer to the instrument by its model number (N9038A) and full serial number (ex. MY49250887). With this information, the Keysight representative can quickly determine whether your unit is still within its warranty period.
  • Page 32 Other AP Countries (65) 6375 8100 Europe and Middle Country Phone Number Austria 0800 001122 Belgium 0800 58580 Finland 0800 523252 France 0805 980333 Germany 0800 6270999 Ireland 1800 832700 Israel 1 809 343051 Italy 800 599100 Keysight N9038A MXE Service Guide...
  • Page 33 +32 800 58580 Netherlands 0800 0233200 Russia 8800 5009286 Spain 0800 000154 Sweden 0200 882255 Switzerland 0800 805353 Opt. 1 (DE) Opt. 2 (FR) Opt. 3 (IT) United Kingdom 0800 0260637 For other unlisted countries: www.keysight.com/find/contactus Keysight N9038A MXE Service Guide...

  • Page 34: Instrument Serial Numbers

    Instrument Serial Numbers Keysight makes frequent improvements to its products enhancing performance, usability, or reliability. Keysight service personnel have access to complete records of design changes to each type of instrument, based on the instrument’s serial number and option designation.

  • Page 35: How To Return Your Instrument For Service

    How to Return Your Instrument for Service How to Return Your Instrument for Service Service Order Number If an instrument is being returned to Keysight for servicing, the phone numbers are mentioned in Table 1-1 on page 32. In order for Keysight to expedite the repair please be as specific as possible about the nature of the failure.

  • Page 36: Other Packaging

    5. Seal the shipping container securely with strong nylon adhesive tape. 6. Mark the shipping container “FRAGILE, HANDLE WITH CARE” to assure careful handling. 7. Retain copies of all shipping papers. Keysight N9038A MXE Service Guide...

  • Page 37: Boot Up And Initialization

    Fan(s) Are Not Operating on page 49 No Keysight Splash Screen Displayed on page 52 Instrument Hangs at the Keysight Splash Screen on page 53 Instrument Cannot Completely Load or Run the Operating System on page Troubleshooting a Blank Display on page 54...

  • Page 38: Check The Basics

    Boot Up and Initialization Check the Basics Check the Basics Before calling Keysight Technologies or returning the instrument for service, please make the following checks: 1. Is there power at the power outlet? At the power receptacle on the instrument? 2.

  • Page 39: Mxe Instrument Boot Up Process

    MXE Instrument Boot Up Process MXE Instrument Boot Up Process This section describes the N9038A EMI Receiver boot up process from initial AC power to a normal analyzer sweep. The boot process time from start to finish will take 6 to 8 minutes. This boot time will vary slightly depending on the analyzer hardware configuration, installed options and the number of measurement applications.

  • Page 40: Typical Instrument Boot-Up Process Flow

    If the analyzer AC power source was removed by the operator by pulling the power cord or by turning off the analyzer via a power main switch on a test rack, the analyzer will automatically power on without having to press the On/Off button on the front panel. Keysight N9038A MXE Service Guide...
  • Page 41 Operating” section in this chapter. 5. The Keysight Technologies splash screen is displayed in white font on a dark background for ~5-10 seconds after the analyzer is turned on. If the Keysight Technologies logo is not displayed refer to the “No Keysight...
  • Page 42 AC power to the spectrum analyzer application. If the power up state has been changed from the factory power on state by IMPORTANT the user, the analyzer will boot to that state. Figure 2-2 Typical Instrument State at Power-up Keysight N9038A MXE Service Guide...

  • Page 43: Potential Problems During Boot Process

    2. Remove the AC power cord and then remove the instrument cover. Refer Chapter 18, “Assembly Replacement Procedures”, on page 527 in this manual. 3. Referring to Figure 2-3, verify the +5.1VSB LED on the A7 Midplane board is on (green). Keysight N9038A MXE Service Guide...
  • Page 44 Standby LED back to the A4 Processor board are not at fault, replace the A4 Processor board. If not: Replace the A6 Power Supply assembly. Before replacing the power supply, verify the midplane and motherboard interconnects are mechanically secure. Keysight N9038A MXE Service Guide...

  • Page 45: Green Power On Led Does Not Illuminate

    Does the voltage at Test Point 518 measure 5 VDC? If yes: Proceed to step If not: Replace the A6 Power Supply assembly. Before replacing the power supply, verify the midplane and motherboard interconnects are mechanically secure. Keysight N9038A MXE Service Guide...
  • Page 46 TTL low level. The A4 Processor board assembly provides the voltage and the switch on the front panel pulls it low when it is pressed. Keysight N9038A MXE Service Guide...
  • Page 47 7. To verify that the A6 Power Supply is not in an over current condition, check the status of the FAULT_L status line by measuring the voltage level at Test Point 508 or viewing the FAULT_L LED, as shown in Figure 2-6. Keysight N9038A MXE Service Guide...
  • Page 48 If no assembly can be found that is causing the overcurrent condition, replace the A6 Power Supply assembly. Figure 2-6 A7 Midplane Board - Test Point 508/FAULT_L LED Keysight N9038A MXE Service Guide...

  • Page 49: Fan(S) Are Not Operating

    3. Are all three fans not spinning? If yes: Proceed to step If not: Proceed to step 4. Remove the Top Brace. Refer to Chapter 18, “Assembly Replacement Procedures”, on page 527 in this manual. Keysight N9038A MXE Service Guide...
  • Page 50 If not: Replace the A6 Power Supply assembly. Before replacing the power supply, verify the midplane and motherboard interconnects are mechanically secure. Figure 2-7 A7 Midplane Board - Fan_P Failure LED / Test Point 522 Keysight N9038A MXE Service Guide...
  • Page 51 If yes: Replace the fan(s) that is not working If not: After verifying that the connections between the A7 Midplane board and the A8 Motherboard are mechanically and electrically secure replace the A8 Motherboard. Keysight N9038A MXE Service Guide...

  • Page 52: No Keysight Splash Screen Displayed

    No Keysight Splash Screen Displayed (Black background with white “Keysight Technologies” text) A problem of not displaying the Keysight splash screen could be caused by many different things. It could be due to a down power supply, a processor hardware problem, an instrument boot-up process error, a display section failure, etc.

  • Page 53: Instrument Hangs At The Keysight Splash Screen

    Potential Problems During Boot Process Instrument Hangs at the Keysight Splash Screen A problem of the instrument hanging at the Keysight splash screen could be caused by many different things. It could be due to a down power supply, a processor hardware problem, an instrument boot-up process error, etc.

  • Page 54: Instrument Cannot Completely Load Or Run The Operating System

    It could be due to a down power supply, a processor hardware problem, an instrument boot-up process error, corrupt disk drive, etc. This procedure assumes that the instrument can get past the Keysight splash screen at power on. If it doesn't, refer to the “Instrument Hangs at the Keysight Splash Screen”...

  • Page 55: Verify Lcd Backlight Functionality

    5. Can the expected display information now be seen? If yes: The problem is backlight related. Proceed to step If not: The problem is not backlight related. Skip to “Verify Video Signal Path Integrity”. Keysight N9038A MXE Service Guide...
  • Page 56 If there is any question as to whether or not this has been set by the user prior to the current failure, and the “Backlight Enable” voltage measures too low, press a front panel key and see if the voltage level increases to the expected level. Keysight N9038A MXE Service Guide...
  • Page 57 >6 VDC Backlight Supply +12 VDC 12.Are all of the 3 voltage levels within their expected ranges? If yes: Replace the A1A4 Display Backlight Power Supply. If not: Replace the A1A2 Front Panel Interface board. Keysight N9038A MXE Service Guide...

  • Page 58: Verify Video Signal Path Integrity

    On the A1A2 Front Panel Interface board the LVDS signals are buffered and then sent to the LCD via the A1W1 Flex circuit. The most likely cause for a video problem is the A4 Processor assembly; however it could be the result of a defective LCD. Keysight N9038A MXE Service Guide...

  • Page 59: Initializations Did Not Complete

    Algorithm measures and displays all of the attenuator step values. In this case, you can view which steps fail, and by how much. Then based on the input attenuator drawing on the MXE RF Block Diagram, you can determine which Keysight N9038A MXE Service Guide...
  • Page 60 A2 Analog IF MechanicalAttenuatorAlgorithm A9 RF Attenuator A A16 Reference provides 50 MHz Calibrator signal A10 RF Attenuator B ElectricalAttenuatorAlgorithm A13 Front End A16 Reference provides 50 MHz calibrator Control signals from A15 Front End Controller Keysight N9038A MXE Service Guide...
  • Page 61 A13 Front End A16 Reference provides 50 MHz Calibrator signal LowBandElecAttenPathSystemGainAlgorithm A13 Front End A16 Reference provides 50 MHz Calibrator signal PreselectorTwoPointTuningAlgorithm A12 YTF Preselector Controlled by A15 Front End Control A15 Front End Control Keysight N9038A MXE Service Guide...
  • Page 62 BurstCarrierTriggerCurveFitAlignmentAlgorithm A2 Analog IF DIF25PulseStretcherAlignmentAlgorithm A3 Digital IF DIF40PulseStretcherAlignmentAlgorithm A3 Digital IF ConductedPreampAmplitudeAlgorithm A21 RF Presel Input ConductedAmplitudeAlgorithm A24 Conducted Filter RadiatedPreampAmplitudeAlgorithm A21 RF Presel Input RadiatedAmplitudeAlgorithm A22 Radiated Filter WBDIFPulseStretcherAlignmentAlgorithm A26 Wideband Digital IF Keysight N9038A MXE Service Guide...

  • Page 63: Signal Level Verification

    4. Place the marker on the peak of the calibrator signal by pressing Peak Search. 5. Verify that the on screen of the 50 MHz Calibrator signal is −25 dBm (+/-2 dB), as shown in Figure 2-10. Figure 2-10 50 MHz Calibrator Signal Keysight N9038A MXE Service Guide...
  • Page 64 3. Tune the instrument to 4.8 GHz with a span of 100 MHz by pressing Span, 100 MHz, Freq, 4.8 GHz. 4. Place the marker on the peak of the calibrator signal by pressing Peak Search. 5. Center the preselector filter by pressing Amptd, Presel Center. Keysight N9038A MXE Service Guide...
  • Page 65 2-11. Figure 2-11 4.8 GHz Calibrator Signal 7. If the signal level is not correct refer to Chapter 5, “RF Preselector Section.” Chapter 6, “RF Downconverter Section.” Chapter 15, “Block Diagrams.” for further troubleshooting information. Keysight N9038A MXE Service Guide...
  • Page 66 Boot Up and Initialization Potential Problems During Boot Process Keysight N9038A MXE Service Guide...

  • Page 67: Instrument Messages

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide Instrument Messages Introduction The Error and Status messaging system of the instrument reports events and conditions in a consistent fashion, as well as logging and reporting event history. Event vs. Condition Messages —...

  • Page 68: Event And Condition Categories

    Warnings are logged in the error queues. If the warning is a condition, both the Detected and Cleared event messages are logged. Keysight N9038A MXE Service Guide...
  • Page 69 It generates a special type of Advisory message. It also only appears on the front panel when the key is pressed. Remotely, the message will appear in the event queue as a warning “-221, Settings conflict; <conflict description>”. Keysight N9038A MXE Service Guide...

  • Page 70: Event Message Format

    An error event that is caused by a front panel action is not reported to any remote interface queue. However, a status condition is usually caused by an internal event that is not related to a particular interface, so the Detected/Cleared events for status conditions are reported to all the error queues. Keysight N9038A MXE Service Guide...
  • Page 71 Displayed in Message Line Grayout Advisory (Forced) Logged Displayed in Message Line See note a. Not logged, unless the cause of the Advisory was remotely generated, in which case a Warning mes- sage, type –221, is logged. Keysight N9038A MXE Service Guide...

  • Page 72: Advisory Messages

    User has canceled the cal either directly or indirectly by changing the setup Cal Cancelled; parameters. The current cal data has been erased. Perform a new user cal to obtain Calibration data cleared calibrated results again Keysight N9038A MXE Service Guide...
  • Page 73 DSB (for DSB measurements the setup uses LSB values) downconverter setup. Use the graph icon on the DUT setup form to clarify the setup required Logarithmic scaling cannot be used for time domain sweeps (0 Hz span) Freq Scale Type=Log is not available in Zero Span Keysight N9038A MXE Service Guide...
  • Page 74 IF Stop freq continuing. The LO fixed freq should be greater than the IF Stop freq for an LSB upconverter fixed LO setup. Use the graph icon on the DUT setup form to clarify the setup required Keysight N9038A MXE Service Guide...
  • Page 75 <port> The Keysight Smart Noise Source has been connected and the application is Reading SNS data… reading the device EEPROM data. Please wait until complete before continuing A file recall (open/load) was successfully completed Recalled File <filename>...
  • Page 76 DVB-T masks minimum. Results may be inaccurate. Zero span is a display at a single frequency, so there is no “sweeping” to set up Sweep Setup is not available in Zero Span Keysight N9038A MXE Service Guide...

  • Page 77: Event Messages

    –221 is defined as Settings Conflict, but in the X-Series you will often see a longer message appended to error –221, such as Settings Conflict; Function not available in Zero Span. This helps you understand the exact cause of the Settings Conflict error. Keysight N9038A MXE Service Guide...

  • Page 78: 800, Operation Complete Event

    The analyzer automatically discards output to correct the deadlock –440 A query was received in the same program message after a query requesting an Query UNTERMINATED indefinite response was executed after indefinite response Keysight N9038A MXE Service Guide...

  • Page 79: -300 To -399, Device-Specific Errors

    Verbose/Correction Information –300 An instrument error occurred and the exact problem cannot be specifically Device-specific error identified. Report this error to the nearest Keysight Technologies sales or service office –310 An internal system-type error has occurred. The exact problem cannot be System error;...
  • Page 80 There is a physical problem with the instrument memory, such as a parity error Memory error –312 Protected user data saved by the *PUD command has been lost PUD memory lost –313 The nonvolatile calibration data used by the *CAL? command has been lost Calibration memory lost Keysight N9038A MXE Service Guide...
  • Page 81 There was a problem with instrument remote communications. The exact Communication error problem cannot be specifically identified –360 The Keysight Smart Noise Source connected to the instrument has failed to be Communication error; read by the application. Please disconnect and reconnect the SNS. If this SNS data read continues to fail, then the SNS may have had its EEPROM corrupted or another failure.

  • Page 82: -221 Settings Conflict Errors

    Tracking Source mode –221 Base Transceiver Station gain correction is not available in some Modes, or in Settings conflict; some measurements (for example, the SA measurement) BTS gain is not available in this Mode Keysight N9038A MXE Service Guide...
  • Page 83 Continuous Peak is not available with Fixed marker –221 The continuous peak feature cannot be used while you are also using the Settings conflict; signal tracking function Continuous Peak is not available with Signal Track on Keysight N9038A MXE Service Guide...
  • Page 84 Settings conflict; View/Display under the key.) This error occurs if you send a SCPI Feature not available command or push a grayed-out key that is not available in the current in this View selected View Keysight N9038A MXE Service Guide...
  • Page 85 If Normalize is on the Amplitude scale is in dB units, so adjusting the Y value Settings conflict; of a Fixed marker is not possible Fixed Marker Y value is not adjustable with Normalize On Keysight N9038A MXE Service Guide...
  • Page 86 –221 If the Gate is On and you have the FFT Sweep Type manually selected, then Settings conflict; the Gate Method cannot be selected Gate Method is not compatible with current Sweep Type setting Keysight N9038A MXE Service Guide...
  • Page 87 Signal Track not available unless the trace containing Marker 1 is updating Settings conflict; Marker 1 Trace Update=off turns off Signal Track –221 A marker must be set relative to another marker, not to itself Settings conflict; Marker cannot be relative to itself Keysight N9038A MXE Service Guide...
  • Page 88 Burst Sync=RF Amptd –221 Mobile Station gain correction is not available in some Modes, or in some Settings conflict; MS measurements (for example, the SA measurement) gain is not available in this Mode Keysight N9038A MXE Service Guide...
  • Page 89 Fixed –221 SCPI only message. This parameter is only available when the Freq mode is Settings conflict; set to Fixed. Change the Freq Mode to Fixed Param only available when Frequency Mode is Fixed Keysight N9038A MXE Service Guide...
  • Page 90 The signal track functionality can be used when making a swept SA Settings conflict; measurement. It is not available in the SA measurement when you are using Signal Track is only FFT sweeps available in Swept SA measurement Keysight N9038A MXE Service Guide...
  • Page 91 –221 If you have selected gated FFT then you are using the FFT sweep type and Settings conflict; you cannot select the swept type of sweeping Swept Type=Swept is not available while in Gated FFT Keysight N9038A MXE Service Guide...
  • Page 92 –221 You must be logged in with administrator privileges to do this. Log out and Settings log back in as the Administrator, then restart the SA application conflict;Administrat or privileges required Keysight N9038A MXE Service Guide...
  • Page 93 –221 You cannot turn on all 3 EMI detectors together. You must turn off one of the Settings conflict;QPD EMI Detectors before you turn this on + EMI Average + RMS Average is not allowed Keysight N9038A MXE Service Guide...
  • Page 94 Step/Time Control. –221 The Step Size & Meas Time are not available when Step/Time Control is set to Settings Scan Time&Pts conflict;Step Size & Meas Time do not apply in current Step/Time Control. Keysight N9038A MXE Service Guide...

  • Page 95: -200 To -299, Execution Errors

    No signal peak was found within the defined parameters of the search. (Note: Execution Error; No for ESA/PSA compatibility, the Swept SA measurement uses 780 for this error peak found. number; all other measurements use –220) Keysight N9038A MXE Service Guide...
  • Page 96 No signal peak was added from the Search to Signal List as no signal peaks No Peak Added to were found within the defined parameters of the search criteria Signal List –200 Cannot perform the selected function because the signal list contains no data Signal List is Empty Keysight N9038A MXE Service Guide...
  • Page 97 –222 A source parameter has been entered that exceeds the range of the selected Data out of Range; source. The parameter has been clipped to match the range of the source clipped to source max/min Keysight N9038A MXE Service Guide...
  • Page 98 Sweep Type is set to –224 The gated video function is not available if you have selected the FFT sweep Illegal parameter type value; Gated Video is not available while Sweep Type is set to Keysight N9038A MXE Service Guide...
  • Page 99 Mode in question (for example, SA for Spectrum Analyzer resources to load System, Power On, Mode.) You can free up resources using the Mode <mode name> Configure Applications menu –225 Out of memory; Memory limit caused Data Acquisition to be truncated Keysight N9038A MXE Service Guide...
  • Page 100 –241 The hardware required is not part of this model Hardware missing; not available for this model number Keysight N9038A MXE Service Guide...
  • Page 101 –250 Cannot save trace because it contains no data. Check that the trace is turned Mass storage error; on and contains some valid data File empty Keysight N9038A MXE Service Guide...
  • Page 102 A removable media was found to be bad or incorrectly formatted. Any existing Corrupt media data on the media may have been lost –254 A legal command/query could not be executed because the media was full Media full Keysight N9038A MXE Service Guide...
  • Page 103 –276 Indicates that a syntactically legal macro program data sequence could not be Macro recursion error executed because the device found it to be recursive Keysight N9038A MXE Service Guide...
  • Page 104 Memory use errors –291   Out of memory –292   Referenced name does not exist –293   Referenced name already exists –294 Indicates that the type or structure of a memory item is inadequate Incompatible type Keysight N9038A MXE Service Guide...

  • Page 105: -100 To -199, Command Errors

    The mantissa of a decimal-numeric contained more than 255 digits, excluding Too many digits leading zeros –128 A legal numeric data element was found, but that is not a valid element at this Numeric data not position in the command allowed Keysight N9038A MXE Service Guide...
  • Page 106 A problem was found with a macro element. The exact problem cannot be Macro error specifically identified –181 Indicates that a macro parameter placeholder was encountered outside of a Invalid outside macro macro definition definition Keysight N9038A MXE Service Guide...

  • Page 107: Error

    Macro parameter error type of parameters 0 Error Err# Message Verbose/Correction Information The queue is empty. Either every error in the queue has been read, or the queue No error was cleared by power-on or *CLS Keysight N9038A MXE Service Guide...

  • Page 108: Condition Messages

    STATus:QUEStionable:CALibration register, as described in section “Condition Errors 36 to 64, Calibration Needed or Failed” on page 109. Err# Bit in Message Error or More Information status Warning register Align RF Skipped unused unused unused unused unused Keysight N9038A MXE Service Guide...
  • Page 109 PTRansition filter set, or a true-to-false transition with the NTRansition filter set, in any of the :CALibration sub-registers :SKIPped, :EXTended:NEEDed or :EXTended:FAILure. Keysight N9038A MXE Service Guide...
  • Page 110 This bit is the summary bit for the Align Skipped Sum Summary only STATus:QUEStionable:CALibration:SKIP ped sub-register. Align Now, RF required unused In PSA, this was error 64 Align Now, All required Keysight N9038A MXE Service Guide...
  • Page 111 Corrected measurements have been Input Attenuation not requested and the required RF front-end calibrated setting of x dB has not been calibrated. unused unused unused unused unused unused unused unused unused unused Keysight N9038A MXE Service Guide...
  • Page 112 Align 9kHz to 30MHz failed In PSA, this was error 13751 Align 30MHz to 1GHz failed The preselector characterization routine failed. Characterize Preselector failure unused unused unused unused unused unused unused unused unused unused unused unused Keysight N9038A MXE Service Guide...

  • Page 113: Condition Errors 101 To 199, Measurement Integrity

    No Result To calculate Timing and Phase results in the No Result;Turn on MCE Code Domain Power view of Mod Accuracy, the "Multi Channel Estimator" must be set to ON. Otherwise these results are invalid. Keysight N9038A MXE Service Guide...
  • Page 114 Meas or Cal). A measurement is attempted or a SCPI query Insufficient Data; Loss of a before or after loss table is made and there table empty are no entries in the relevant loss table Keysight N9038A MXE Service Guide...
  • Page 115 AF Spectrum RBW or the RF Spectrum RBW, decrease the Channel BW, and/or decrease the Demod Waveform Sweep Time. Keysight N9038A MXE Service Guide...

  • Page 116: Condition Errors 201 To 299, Signal Integrity

    When the condition is cleared, an event with the error number plus 1000 is generated. These error numbers can be viewed in the Show Errors screen, along with the DETECTED and CLEARED indicators. Keysight N9038A MXE Service Guide...
  • Page 117 WLAN: The instrument cannot find a valid WLAN burst. You may need to extend the search length. In PSA, this error was reported as one of the following error numbers: 10772, 13104, 10160, 10286, 10420, 10454, 10614, 10904, 10928, 13074, 10287 Keysight N9038A MXE Service Guide...
  • Page 118 Failed to find the uplink slot, which caused the Sync synchronization with the Midamble to fail. Error;Midamble sync fail Burst type is "Data" or "Preamble" and the Sync measurement cannot find a Preamble Error;Preamble length zero Keysight N9038A MXE Service Guide...
  • Page 119 This may be caused by an interval too incorrect data capture. short There is no active channel detected. Demod Error;No active channel There is no active slot detected. Demod Error;Not an active slot Keysight N9038A MXE Service Guide...

  • Page 120: Condition Errors 301 To 399, Uncalibrated Integrity

    Condition Errors 301 to 399, Uncalibrated Integrity This series of errors corresponds to the bits in the STATus:QUEStionable:INTegrity:UNCalibrated sub-register. The second column in the table shows the corresponding bit in that register. Keysight N9038A MXE Service Guide...
  • Page 121 Meas Uncal Signal ID on No Long Code Phase AC input coupling will function at lower AC coupled: Accy frequencies, but the performance is not specified unspec’d <10 MHz below 10 MHz. User cal Keysight N9038A MXE Service Guide...
  • Page 122 (UNCAL) The measurement frequency range has been User Cal; Cal will be changed such that it is a subset of the calibrated interpolated range. (~CAL) Keysight N9038A MXE Service Guide...
  • Page 123 Start Freq or narrow the RBW. Preamp will function at lower frequencies, but the Preamp: Accy unspec’d performance is not specified below XX kHz (XX is <XX kHz model number specific). unused unused unused unused unused unused unused Keysight N9038A MXE Service Guide...

  • Page 124: Condition Errors 401 To 499, Power

    Warning register (not currently in use) RPP Tripped Source Unleveled (not currently in use) Source LO Unleveled (not currently in use) LO Unleveled unused unused unused unused unused unused unused unused unused unused unused Keysight N9038A MXE Service Guide...

  • Page 125: Condition Errors 501 To 599, Frequency

    External amplitude range. In PSA, this error was reported as error The pulse reference signal is missing or is Ref missing or out of not within the correct amplitude range. range; Pulse Keysight N9038A MXE Service Guide...

  • Page 126: Condition Errors 601 To 699, Error Summaries

    Err# Bit in Message Error or More Information status Warning register unused unused unused status bit This bit is the summary bit for the Power only STATus:QUEStionable:POWer sub-register. Keysight N9038A MXE Service Guide...

  • Page 127: Condition Errors 701 To 799, Operation

    Unless otherwise noted in the Error or Warning column below, these are status bits only, with no corresponding error message or number Err# Bit in Message Error or More Information status Warning register status bit Calibrating only status bit Settling only Keysight N9038A MXE Service Guide...
  • Page 128 In the EMI Receiver mode, it is used to indicate that scan results are available from the Frequency Scan measurement DC Coupled unused status bit Source Waiting for only Trigger unused unused Keysight N9038A MXE Service Guide...

  • Page 129: Condition Errors 801 To 899, Temperature

    126. Err# Bit in Message Error or More Information status Warning register (not currently in use) Reference Oscillator Oven Cold unused unused unused unused unused unused unused unused unused unused unused unused unused unused Keysight N9038A MXE Service Guide...
  • Page 130 Instrument Messages Condition Messages Keysight N9038A MXE Service Guide...

  • Page 131: Input Selection & Level Control

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide Input Selection & Level Control What You Will Find in This Chapter The following information is found in this chapter: 1. Theory of operation of the Input Selection and Level Control section.

  • Page 132: Input Selection & Level Control Section Purpose

    Refer to Chapter 15, “Block Diagrams.”. The components discussed in this chapter are: — A9 Input Attenuator A — A10 Input Attenuator B — A23 Limiter Assembly — SW1 Cal Switch — SW2 Transfer Switch Keysight N9038A MXE Service Guide...

  • Page 133: Input Selection & Level Control Assembly Descriptions

    Input Selection & Level Control Assembly Descriptions A9 Input Attenuator A There are two different A9 Input Attenuator A assemblies used in the N9038A. One is used in instruments with Option 503, 508, and 526 and the other with Option 544.

  • Page 134: A23 Limiter Assembly

    J102 IF Input RF Input J2 J103 RF Output SW1 Cal Switch P1 J108 JTAG Programming A21 RF Preselector Input Assembly J602 RF Input LED Control A1A5J1 & A1A6J1 Figure 4-1 A23 Limiter Assembly Connections Keysight N9038A MXE Service Guide...

  • Page 135: Sw1 Cal Switch

    This assembly is used to select whether or not to divert the input signal through the RF Preselector section of the instrument or not. Control for this assembly comes from the A21 RF Preselector Input assembly. Keysight N9038A MXE Service Guide...

  • Page 136: Input Selection & Level Control Section Troubleshooting

    — SW2 Transfer Switch A9 Attenuator A There are two different A9 Attenuator A assemblies used in the N9038A; one for the Option 503, 508, and 526 instruments and one for the Option 544 instruments. While the overall amount of attenuation is the same for all instruments, the distribution of the attenuator sections within the attenuators is not quite the same.
  • Page 137 4-3. These functions will be verified with the procedure in this section. They are: 1. RF Input Selection 2. Attenuation Selection (0 to 10 dB in 2 dB steps) Figure 4-3 A9 Attenuator A Functions - Option 544 Keysight N9038A MXE Service Guide...
  • Page 138 2. Referring to Figure 4-4 Figure 4-5, remove W25, W28, and W29 from A9 Attenuator A. Figure 4-4 A9 & A10 Cable Identification - Option 503, 508, and 526 Keysight N9038A MXE Service Guide...
  • Page 139 9. Connect a spectrum analyzer to the A9 Attenuator A RF Output. Refer to Figure 4-4. 10.Tune the spectrum analyzer to 1 MHz with a span of 1 MHz 11.Change the instrument input coupling to DC by pressing Input / Output, RF Input, RF Coupling DC. Keysight N9038A MXE Service Guide...
  • Page 140 If the signal level is incorrect the most likely cause of the problem is the A9 Attenuator A assembly itself. However, before replacing an A9 Attenuator A assembly for any failure, refer to Chapter 8, “Front End Control.” information on how to verify the control signals to it. Keysight N9038A MXE Service Guide...
  • Page 141 Attenuator A assembly itself. However, before replacing an A9 Attenuator A assembly for any failure, refer to Chapter 8, “Front End Control.” information on how to verify the control signals to it. Figure 4-7 A9 Attenuator A RF Input #1 Keysight N9038A MXE Service Guide...
  • Page 142 If the signal level is incorrect the most likely cause of the problem is the A9 Attenuator A assembly itself. However, before replacing an A9 Attenuator A assembly for any failure, refer to Chapter 8, “Front End Control.” information on how to verify the control signals to it. Keysight N9038A MXE Service Guide...
  • Page 143 If the signal level is incorrect the most likely cause of the problem is the A9 Attenuator A assembly itself. However, before replacing an A9 Attenuator A assembly for any failure, refer to Chapter 8, “Front End Control.” information on how to verify the control signals to it. Keysight N9038A MXE Service Guide...
  • Page 144 28.If no problem has been found with the functionality of the A9 Attenuator A assembly carefully reconnect W25, W28, and W29 to the A9 Attenuator A as shown if Figure 4-4. Torque all cable connections to 10 in-lbs. Keysight N9038A MXE Service Guide...

  • Page 145: A10 Attenuator B

    Input Selection & Level Control Section Troubleshooting A10 Attenuator B There are two different A10 Attenuator B assemblies used in the N9038A; one for the Option 503, 508, and 526 instruments and one for the Option 544 instruments. While the overall amount of attenuation is the same for all instruments, the distribution of the attenuator sections within the attenuators is not quite the same.
  • Page 146 A10 Attenuator B assembly itself. However, before replacing an A10 Attenuator B assembly for any failure, refer to Chapter 8, “Front End Control.” for information on how to verify the control signals to it. Figure 4-13 A10 Attenuator B −0 dB Keysight N9038A MXE Service Guide...
  • Page 147 A10 Attenuator B assembly itself. However, before replacing an A10 Attenuator B assembly for any failure, refer to Chapter 8, “Front End Control.” for information on how to verify the control signals to it. Figure 4-14 A10 Attenuator B −10 dB Keysight N9038A MXE Service Guide...
  • Page 148 16.If no problem has been found with the functionality of the A10 Attenuator B assembly carefully reconnect W29 and W30 to the A10 Attenuator B as shown in Figure 4-4. Torque all cable connections to 10 in-lbs. Keysight N9038A MXE Service Guide...

  • Page 149: A23 Limiter Assembly

    W8 which connects it to the A8 Motherboard assembly. Refer Chapter 18, “Assembly Replacement Procedures.” for instructions on removing the front frame assembly. 3. Referring to Figure 4-16, disconnect W27 from the A23 Limiter assembly Output (J103). Keysight N9038A MXE Service Guide...
  • Page 150 9. Tune the spectrum analyzer to a frequency of 100 MHz with a span of 10 MHz. 10.Verify that the signal level on the spectrum analyzer is at −29 dBm (±1.5 dB), as shown in Figure 4-17, allowing for any additional test cable loss. Keysight N9038A MXE Service Guide...
  • Page 151 This can be verified in the A21 RF Input Assembly section of the chapter. Figure 4-17 A23 Limiter Assembly - Signal Path Loss Keysight N9038A MXE Service Guide...
  • Page 152 If the voltage levels are incorrect verify that the A23 Limiter control voltages coming from the A21 RF Preselector Input assembly are correct before replacing the A23 Limiter assembly. This can be verified in the A21 RF Input Assembly section of this chapter. Keysight N9038A MXE Service Guide...
  • Page 153 A23 Limiter Assembly - P2 Pinout Table 4-3 A23 Limiter Assembly - LED Control Voltage Levels P2 Pin # RF Input Port RF Input 0.7 V 5.0 V RF Input 2 5.0 V 0.7 V Keysight N9038A MXE Service Guide...
  • Page 154 If the voltage levels are incorrect verify that the A23 Limiter control voltages coming from the A21 RF Preselector Input assembly are correct before replacing the A23 Limiter assembly. This can be verified in the A21 RF Input Assembly section of this chapter. Keysight N9038A MXE Service Guide...

  • Page 155: Sw1 Cal Switch

    A23 Limiter assembly. Refer to Chapter 18, “Assembly Replacement Procedures.” for instructions on removing the front frame assembly. 3. Referring to Figure 4-20, disconnect W27, W28, and W43 from the SW1 Cal Switch. Keysight N9038A MXE Service Guide...
  • Page 156 9. Tune the spectrum analyzer to 100 MHz with a span of 1 MHz. If there is a particular frequency of interest use that instead of the 100 MHz used in this example. The maximum frequency for the SW1 Cal Switch signal path is 1 GHz. Keysight N9038A MXE Service Guide...
  • Page 157 SW1 Cal Switch itself. However, before replacing an SW1 Cal Switch for any failure, refer to the “A21 RF Preselector Input Assembly” section on page 175 for information on how to verify the control signals to it. Keysight N9038A MXE Service Guide...
  • Page 158 15.If no problem has been found with the functionality of the SW1 Cal Switch carefully reconnect W27, W28, and W43 to the SW1 Cal Switch as shown Figure 4-20. Torque all cable connections to 10 in-lbs. Keysight N9038A MXE Service Guide...

  • Page 159: Sw2 Transfer Switch

    W8 which connects it to the A8 Motherboard assembly, or W1 which connects to the A23 Limiter assembly. Refer to Chapter 18, “Assembly Replacement Procedures.” for instructions on removing the front frame assembly. Keysight N9038A MXE Service Guide...
  • Page 160 SW2 Transfer Switch itself. However, before replacing an SW2 Transfer Switch for any failure, refer to the “A21 RF Preselector Input Assembly” section on page 175 for information on how to verify the control signals to Keysight N9038A MXE Service Guide...
  • Page 161 16.Move the spectrum analyzer to the SW2 Transfer Switch RF Output (P4), as shown in Figure 4-21. 17.Verify that the signal level on the spectrum analyzer is at −20 dBm (±0.25 dB), as shown in Figure 4-24, allowing for any additional test cable loss. Keysight N9038A MXE Service Guide...
  • Page 162 18.If no problem has been found with the functionality of the SW2 Transfer Switch carefully reconnect W30, W31, W36, and W37 to the SW2 Transfer Switch as shown in Figure 4-20. Torque all cable connections to 10 in-lbs. Keysight N9038A MXE Service Guide...
  • Page 163 Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide RF Preselector Section What You Will Find in This Chapter The following information is found in this chapter: 1. Theory of operation of the RF Preselection section. 2. Isolating the cause of an hardware problem by verifying the functionality of assemblies in the RF Preselector section signal path.

  • Page 164: Rf Preselector Section

    When routed through the RF Preselector section the input signal first goes to the A21 RF Preselector Input assembly where it is sent through a low pass filter before it is routed to the A24 Conducted Filter assembly. Keysight N9038A MXE Service Guide...
  • Page 165 A21 RF Preselector Input assembly. If the user selects to use it, the signal is then amplified before it reaches an overload detector. The signal then leaves the A21 RF Preselector Input assembly and is routed back to the SW2 Transfer switch. Keysight N9038A MXE Service Guide...

  • Page 166: Rf Preselector Section Assembly Descriptions

    3 dB roll-off at around 55 MHz. The purpose of this filter is to only allow input signals within the operating frequency range of the A24 Conducted Filter assembly to be sent to it. Keysight N9038A MXE Service Guide...
  • Page 167 Input assembly, a Direct Digital Synthesizer (DDS) and a broadband noise source. The Direct Digital Synthesizer provides a CW signal up to 50 MHz which is used by the system alignment routine to adjust the amplitude accuracy of the conducted filter path. Keysight N9038A MXE Service Guide...
  • Page 168 A22 Radiated Filter Assembly J300 J500 JTAG Programming J600 Bias and Control A8 Motherboard J71 J602 Limiter Assembly Control A23 Limiter Assembly J108 P600 SW1 & SW2 Control SW1 Cal Switch & SW2 Transfer Switch Keysight N9038A MXE Service Guide...
  • Page 169 RF Preselector Section RF Preselector Section Purpose Figure 5-1 A21 RF Preselector Input Assembly Connections Keysight N9038A MXE Service Guide...

  • Page 170: A22 Radiated Filter Assembly

    The Band 6 filter path consists of a fixed highpass filter. The through path has no filtering and is only used during the instrument alignment and calibration. There is a limiter and amplifier at the output of the fixed filter path section. Keysight N9038A MXE Service Guide...
  • Page 171 RF Preselection path, the gain of these amplifiers will be greater than any loss on the A22 Radiated Filter assembly. This means that there will be an overall gain through the A22 Radiated Filter assembly. Keysight N9038A MXE Service Guide...
  • Page 172 J100 IF Input A21 RF Preselector Input Assembly J102 J300 RF Output A21 RF Preselector Input Assembly J306 J400 JTAG Programming J500 Bias and Control A8 Motherboard J81 Figure 5-2 A22 Radiated Filter Assembly Connections Keysight N9038A MXE Service Guide...

  • Page 173: A24 Conducted Filter Assembly

    — Band 8 - 14 MHz to 17 MHz — Band 9 - 17 MHz to 20 MHz — Band 10 - 20 MHz to 24 MHz — Band 11 - 24 MHz to 28 MHz Keysight N9038A MXE Service Guide...
  • Page 174 J102 JTAG Programming J400 Bias & Control A8 Motherboard J61 J401 RF Output A21 RF Preselector Input Assembly J200 J402 RF Input A21 RF Preselector Input Assembly J103 Figure 5-3 A24 Conducted Filter Assembly Connections Keysight N9038A MXE Service Guide...

  • Page 175: Rf Preselector Section Troubleshooting

    1. Assembly Initialization 2. SW1 Cal Switch and SW2 Transfer Switch Control 3. A23 Limiter Assembly Control 4. Input Signal Routing and Pre-Filtering 5. Output Signal Routing and Preamplifiers 6. Alignment Signal Generation 7. Through Path Keysight N9038A MXE Service Guide...
  • Page 176 Both the SW1 Cal Switch and the SW2 Transfer Switch are controlled by a single ribbon cable (W2) that comes from P600 on the A21 RF Preselector Input assembly, as seen in Figure 5-4. Figure 5-4 A21 RF Preselector Input Assembly Connections Keysight N9038A MXE Service Guide...
  • Page 177 RF Calibrator Off as shown in Table 5-4. If the voltage levels are incorrect the most likely cause of the problem is the A21 RF Preselector Input assembly itself. Keysight N9038A MXE Service Guide...
  • Page 178 If the voltage levels are incorrect the most likely cause of the problem is the A21 RF Preselector Input assembly itself. SW2 Transfer Switch Control 10.Verify that the RF Preselector is turned off by pressing Input / Output, RF Input, RF Preselector Off. Keysight N9038A MXE Service Guide...
  • Page 179 6. Measure the DC voltages on pins 1 through 6 on J602 of the A21 RF Preselector Input assembly, as shown in Figure 5-7, and verify that they are what is expected for the RF Input Port being RF Input as shown in Table 5-6. Keysight N9038A MXE Service Guide...
  • Page 180 RF Input Port being RF Input 2 as shown in Table 5-6. If the voltage levels are incorrect the most likely cause of the problem is the A21 RF Preselector Input assembly itself. Keysight N9038A MXE Service Guide...
  • Page 181 8. Tune the spectrum analyzer to a frequency of 50.5 MHz with a span of 100 MHz. 9. Tune the instrument to a frequency of 10 MHz with a span of 0 Hz by pressing FREQ, 10 MHz, and SPAN, Zero Span. Keysight N9038A MXE Service Guide...
  • Page 182 Input Signal Routing Verification - Radiated Band 14.Tune the signal generator to 1 GHz with an amplitude of −20 dBm. 15.Move the spectrum analyzer to the A21 RF Preselector Input assembly Radiated Band Pre-Filtered Output (J102), as shown in Figure 5-4. Keysight N9038A MXE Service Guide...
  • Page 183 21.Verify that the filter shape on the spectrum analyzer display is similar to that shown in Figure 5-10. If the filter shape is incorrect the most likely cause of the problem is the A21 RF Preselector Input assembly itself. Keysight N9038A MXE Service Guide...
  • Page 184 2. Referring to Figure 5-4 Figure 5-5, remove W33, W35, and W36 from the A21 RF Preselector Input assembly. 3. Turn the instrument on and allow it to complete its boot up process, ignoring any error messages. Keysight N9038A MXE Service Guide...
  • Page 185 If the signal level is incorrect the most likely cause of the problem is the A21 RF Preselector Input assembly itself. Figure 5-12 A21 RF Preselector Input Assembly - Conducted Band Output 11.Turn on the Marker Delta function of the spectrum analyzer being used. Keysight N9038A MXE Service Guide...
  • Page 186 14.Turn the instrument Preamp off by pressing AMPTD, More, Internal Preamp, Off. Output Signal Routing Verification - Radiated Band If there is a particular frequency of interest use that instead of the 100 MHz used in this example Keysight N9038A MXE Service Guide...
  • Page 187 Figure 5-14 A21 RF Preselector Input Assembly - Radiated Band Output 20.Turn on the Marker Delta function of the spectrum analyzer being used. 21.Turn the instrument Preamp on by pressing AMPTD, More, Internal Preamp, Low Band. Keysight N9038A MXE Service Guide...
  • Page 188 A21 RF Preselector Input Assembly - Radiated Band Preamp Alignment Signal Generation There are two alignment signals generated on the A21 RF Preselector Input assembly to be verified, a Direct Digital Synthesizer and a Broad Band Noise Source, as seen in Figure 5-16. Keysight N9038A MXE Service Guide...
  • Page 189 8. Turn the Direct Digital Synthesizer on and tune it to 5 MHz by entering the Service menu and pressing More, RF Preselector, Calibrator, DDS Freq, 5 MHz. For information on how to access the instrument's Service menu see Chapter 16, “Service and Diagnostics Menus.”. Keysight N9038A MXE Service Guide...
  • Page 190 12.Tune the spectrum analyzer to a start frequency of 10 MHz and a stop frequency of 4 GHz. 13.Tune the instrument to a frequency of 100 MHz with a span of 0 Hz by pressing FREQ, 100 MHz, and SPAN, Zero Span. Keysight N9038A MXE Service Guide...
  • Page 191 A21 RF Preselector Input Assembly - Noise Source Output Through Path While it is not used during normal instrument operation, there is a signal through path on the A21 RF Preselector Input assembly, which will be verified in this section. Keysight N9038A MXE Service Guide...
  • Page 192 −30 dBm (±3 dB) across the frequency range, as shown in Figure 5-19, allowing for any additional test cable loss. If the signal level is incorrect the most likely cause of the problem is the A21 RF Preselector Input assembly itself. Keysight N9038A MXE Service Guide...
  • Page 193 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-19 A21 RF Preselector Input Assembly - Through Path Keysight N9038A MXE Service Guide...

  • Page 194: A22 Radiated Filter Assembly

    Solution: Replace the A22 Radiated Filter assembly Assembly Status LEDs There are six diagnostics LEDs visible on the A22 Radiated Filter Assembly, as shown in Figure 5-20. Table 5-7 lists the diagnostic LEDs and what their status indicates. Keysight N9038A MXE Service Guide...
  • Page 195 To verify the instrument power supply voltages see Chapter 12, “Power Supply & Midplane”. If the instrument power supply voltages are all correct try reload the FPGA code. See FPGA Keysight N9038A MXE Service Guide...
  • Page 196 5-5, remove W34 and W35 from the A22 Radiated Filter assembly. To remove W35 pinch the retainer clips on both ends of the cable and slide the retainers away from the connection as shown in Figure 5-21. Keysight N9038A MXE Service Guide...
  • Page 197 10.Tune the filter passband center frequency by pressing Tuned Frequency and entering the Center Frequency value found in Table 5-8 for the filter band selected, while in the Radiated band selection area of the Service menu. Keysight N9038A MXE Service Guide...
  • Page 198 600 MHz to 1 GHz 800 MHz 200 MHz +6.0 dB Band 5 1 GHz to 2 GHz 1.5 GHz 300 MHz +6.0 dB Band 6 2 GHz to 3.6 GHz 2.55 GHz 2.1 GHz +10.0 dB Keysight N9038A MXE Service Guide...
  • Page 199 A24 Conducted Filter Assembly - Through Signal Paths Service Menu Frequency Range Verification Start Verification Stop Typical Passband Selection Frequency Frequency Gain/Loss 30 MHz to 3.6 GHz 0 Hz 100 MHz +10.0 dB Band 2 a. Not used during normal instrument operation. Keysight N9038A MXE Service Guide...
  • Page 200 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-22 A22 Radiated Filter Assembly - Band 0 Filter Path Figure 5-23 A22 Radiated Filter Assembly - Band 1 Filter Path Keysight N9038A MXE Service Guide...
  • Page 201 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-24 A22 Radiated Filter Assembly - Band 2 Filter Path Figure 5-25 A22 Radiated Filter Assembly - Band 3 Filter Path Keysight N9038A MXE Service Guide...
  • Page 202 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-26 A22 Radiated Filter Assembly - Band 4 Filter Path Figure 5-27 A22 Radiated Filter Assembly - Band 5 Filter Path Keysight N9038A MXE Service Guide...
  • Page 203 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-28 A22 Radiated Filter Assembly - Band 6 Filter Path Figure 5-29 A22 Radiated Filter Assembly - Band 2 Through Path Keysight N9038A MXE Service Guide...

  • Page 204: A24 Conducted Filter Assembly

    — An instrument power supply voltage is not operating properly Solution: Verify all instrument power supply voltages. See Chapter 12, “Power Supply & Midplane”. — A24 Conducted Filter assembly is defective Solution: Replace the A24 Conducted Filter assembly Keysight N9038A MXE Service Guide...
  • Page 205 (J402), as shown in Figure 5-4. 6. Set the power level of the signal generator to −20 dBm. 7. Connect a spectrum analyzer to the A24 Conducted Filter assembly RF Output (J401), as shown in Figure 5-4. Keysight N9038A MXE Service Guide...
  • Page 206 Start Frequency, Verification Stop Frequency, and Typical Passband Gain/Loss shown in Table 5-10 for each band. Verify that the passband for each additional filter band is similar to that shown in the corresponding examples shown in Figure 5-31 through Figure 5-42. Keysight N9038A MXE Service Guide...
  • Page 207 18.Place one of the active traces on the spectrum analyzer into its Max Hold function. 19.Slowly vary the frequency of the signal generator between the Verification Start Frequency and the Verification Stop Frequency listed in Table 5-11 draw out the Band 0 through path shape. Keysight N9038A MXE Service Guide...
  • Page 208 −1.00 dB Band 0 2 MHz to 30 MHz 0 Hz 100 MHz +3.0 dB Band 1 a. Not used during normal instrument operation. Figure 5-30 A24 Conducted Filter Assembly - Band 0 Filter Path Keysight N9038A MXE Service Guide...
  • Page 209 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-31 A24 Conducted Filter Assembly - Band 1 Filter Path Figure 5-32 A24 Conducted Filter Assembly - Band 2 Filter Path Keysight N9038A MXE Service Guide...
  • Page 210 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-33 A24 Conducted Filter Assembly - Band 3 Filter Path Figure 5-34 A24 Conducted Filter Assembly - Band 4 Filter Path Keysight N9038A MXE Service Guide...
  • Page 211 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-35 A24 Conducted Filter Assembly - Band 5 Filter Path Figure 5-36 A24 Conducted Filter Assembly - Band 6 Filter Path Keysight N9038A MXE Service Guide...
  • Page 212 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-37 A24 Conducted Filter Assembly - Band 7 Filter Path Figure 5-38 A24 Conducted Filter Assembly - Band 8 Filter Path Keysight N9038A MXE Service Guide...
  • Page 213 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-39 A24 Conducted Filter Assembly - Band 9 Filter Path Figure 5-40 A24 Conducted Filter Assembly - Band 10 Filter Path Keysight N9038A MXE Service Guide...
  • Page 214 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-41 A24 Conducted Filter Assembly - Band 11 Filter Path Figure 5-42 A24 Conducted Filter Assembly - Band 12 Filter Path Keysight N9038A MXE Service Guide...
  • Page 215 RF Preselector Section RF Preselector Section Troubleshooting Figure 5-43 A24 Conducted Filter Assembly - Band 0 Through Path Figure 5-44 A24 Conducted Filter Assembly - Band 1 Through Path Keysight N9038A MXE Service Guide...
  • Page 216 RF Preselector Section RF Preselector Section Troubleshooting Keysight N9038A MXE Service Guide...

  • Page 217: Rf Downconverter Section

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide RF Downconverter Section What You Will Find in This Chapter The following information is found in this chapter: 1. Theory of operation of the RF section. 2. Isolating the cause of an hardware problem by verifying the functionality of assemblies in the RF section signal path.

  • Page 218: Rf Downconverter Section Description

    8.3 GHz to 13.6 GHz 13.5 GHz to 17.1 GHz 13.5 GHz to 17.1 GHz 17.0 GHz to 26.5 GHz 17.0 GHz to 26.5 GHz 26.4 GHz to 34.5 GHz 34.4 GHz to 44.0 GHz Keysight N9038A MXE Service Guide...
  • Page 219 While all of these assemblies are used for all of the different frequency range options, the Option 544 instruments use a different part number assembly than the Option 503, 508, and 526 instruments for each. Keysight N9038A MXE Service Guide...

  • Page 220: Rf Section Signal Paths

    2nd IF of 322.5 MHz. 2nd IF = 1st IF − 2nd LO 2nd IF = 5122.5 MHz − 4800 MHz = 322.5 MHz The 322.5 MHz 2nd IF output exits the A13 RF Front End assembly at J7. Keysight N9038A MXE Service Guide...
  • Page 221 After passing through the A12 YTF Preselector the signal is then routed to the A13 RF Front End assembly. The input switch in the A13 RF Front End assembly routes the RF input signal to the correct 1st mixer for the current tuned frequency. Keysight N9038A MXE Service Guide...
  • Page 222 (A9 & A10). The signal is then routed through the SW2 Transfer switch, where it could either be directed through the RF Preselector section of the instrument or bypass it. Keysight N9038A MXE Service Guide...
  • Page 223 A14 LO Synthesizer assembly after it has been doubled in frequency on the A13 RF Front End assembly to generate a 1st IF of 322.5 MHz. 1st IF = (1st LO x 2) - RF = 322.5 MHz Keysight N9038A MXE Service Guide...
  • Page 224 In this case the input signal is mixed with 8 times the output frequency of the A14 LO Synthesizer assembly to generate the 322.5 MHz 1st IF. The 322.5 MHz 1st IF output exits the A13 RF Front End assembly at J7. Keysight N9038A MXE Service Guide...

  • Page 225: Rf Section Assembly Descriptions

    Control for this assembly comes from the A15 Front End Controller assembly. There are two different A11 RF Switch / High Band Preamp assemblies used in the N9038A - one for instruments with Option 503, 508, or 526 and one for instruments with Option 544.
  • Page 226 RF Downconverter Section Description Figure 6-1 A11 RF Switch / High Band Preamp Assembly Connections - Option 503, 508, & 526 Figure 6-2 A11 RF Switch / High Band Preamp Assembly Connections - Option 544 Keysight N9038A MXE Service Guide...
  • Page 227 6.5 dB. Control for this assembly comes from the A15 Front End Controller assembly. There are two different A12 YTF Preselector assemblies used in the N9038A - one for instruments with Option 503, 508, or 526 and one for instruments with Option 544.
  • Page 228 RF Downconverter Section RF Downconverter Section Description Figure 6-3 A12 YTF Preselector Assembly Connections - Option 503, 508, & 526 Figure 6-4 A12 YTF Preselector Assembly Connections - Option 544 Keysight N9038A MXE Service Guide...
  • Page 229 Control for this assembly comes from the A15 Front End Controller assembly. The connections to and from the A15 Front End Control assembly are as listed Table 6-4 Table 6-5 and as illustrated in Figure 6-5 Figure 6-6. Keysight N9038A MXE Service Guide...
  • Page 230 5122.5 MHz Low Band 1st IF Input A13A1 BPF Output A13W2 5122.5 MHz Bias & Control A15 Front End Controller J102 Serial Prefix < MY/SG5322 A15 Front End Controller J104 Ext. IF Output no used Keysight N9038A MXE Service Guide...
  • Page 231 RF Downconverter Section RF Downconverter Section Description Figure 6-5 A13 Front End Assembly Connections - Option 503, 508, & 526 Keysight N9038A MXE Service Guide...
  • Page 232 Low Band 1st IF Input A13A1 BPF Output A13W2 5122.5 MHz Bias & Control A15 Front End Control J102 External IF Output Terminated into 50 Ω Figure 6-6 A13 Front End Assembly Connections - Option 544 Keysight N9038A MXE Service Guide...

  • Page 233: Rf Downconverter Section Troubleshooting

    A11 RF Switch / High Band Preamp There are two different A11 RF Switch / High Band Preamp assemblies used in the N9038A - one for instruments with Option 503, 508, or 526 and one for instruments with Option 544.
  • Page 234 −1.6 dB 0.5 GHz to 3.6 GHz High Band Thru 3.6 GHz to 44.0 GHz −7.0 dB 3.6 GHz to 15 GHz −5.0 dB 15 GHz to 35 GHz −7.0 dB 35 GHz to 44 GHz Keysight N9038A MXE Service Guide...
  • Page 235 6-8, remove W37 by disconnecting it from the A11 RF Switch / High Band Preamp assembly Input (J1) and the SW2 Output (P4). 5. Turn the instrument on and allow it to complete its boot up process. Keysight N9038A MXE Service Guide...
  • Page 236 RF Downconverter Section RF Downconverter Section Troubleshooting Figure 6-7 A11 RF Switch / High Band Preamp Connections - Option 503, 508, & 526 Keysight N9038A MXE Service Guide...
  • Page 237 FREQ, 50 MHz and SPAN, Zero Span. 12.Verify that the signal amplitude on the spectrum analyzer display is approximately what is expected, as outlined in Table 6-6 Table 6-7, allowing for any additional test cable loss, as seen in Figure 6-9. Keysight N9038A MXE Service Guide...
  • Page 238 13.Tune the signal generator and spectrum analyzer to any other frequency up to 3.6 GHz and verify that the loss through the low band signal path remains within a few dB of the values outlined in Table 6-6 Table 6-7. Keysight N9038A MXE Service Guide...
  • Page 239 Preamp when the input is switched to the low band path is less than 40 dB. Because of this, if the signal path appears to be less than 40 dB too low it could be that the switch control lines from the A15 Front End Control assembly are at fault. Keysight N9038A MXE Service Guide...
  • Page 240 28.Switch the A11 RF Switch / High Band Preamp assembly to the high band preamp signal path by pressing AMPTD, More, Internal Preamp, Full Range. 29.Verify that the signal amplitude increases by approximately what is expected, as outlined in Table 6-6 Table 6-7, as shown in Figure 6-11. Keysight N9038A MXE Service Guide...
  • Page 241 32.If the high band preamp signal path gain continues to be within the expected values, the A11 RF Switch / High Band Preamp is functioning properly. 33.Reconnect W37, W38, and W39 as shown in Figure 6-7 Figure 6-8. Keysight N9038A MXE Service Guide...

  • Page 242: A12 Ytf Preselector

    RF Downconverter Section RF Downconverter Section Troubleshooting A12 YTF Preselector There are two different A12 YTF Preselector assemblies used in the N9038A - one for instruments with Option 503, 508, or 526 and one for instruments with Option 544. There are 7 different aspects of the A12 YTF Preselector functionality that can be verified with the procedures in this section.
  • Page 243 After that, DS2 will turn off and DS3 will turn on. At the same time that DS3 turns on DS5 will start to blink. It Keysight N9038A MXE Service Guide...
  • Page 244 A6 Power Supply assembly or the A15 Front End Control assembly. Keysight N9038A MXE Service Guide...
  • Page 245 RF Downconverter Section RF Downconverter Section Troubleshooting Figure 6-13 A12 YTF Preselector Connector Locations - Option 503, 508, & 526 Figure 6-14 A12 YTF Preselector Connector Locations - Option 544 Keysight N9038A MXE Service Guide...
  • Page 246 If this voltage is not +30 volts ±0.5 there is most likely a problem with the A15 Front End Control assembly. See Chapter 8, “Front End Control.” to determine the cause of this failure. Keysight N9038A MXE Service Guide...
  • Page 247 -20 dBm, accounting for the loss of the cables being used. 14.Referring to Figure 6-15, use a volt meter to measure the DC voltage on pin 1 of J2 on the A12 YTF Preselector control board (this voltage is referenced to chassis ground). Keysight N9038A MXE Service Guide...
  • Page 248 17.If the tune voltage is not increasing in frequency similar to what is shown Table 6-9 the drive circuitry to the A12 YTF Preselector assembly needs to be verified. See Chapter 8, “Front End Control.” to determine the cause of this failure. Keysight N9038A MXE Service Guide...
  • Page 249 9. Tune the spectrum analyzer to 6 GHz with a span of 100 MHz. 10.Turn the instrument self-alignment routine off by pressing System, Alignments, Auto Align, Off. Keysight N9038A MXE Service Guide...
  • Page 250 13.Turn on trace 2 of the spectrum analyzer and set it to use the Maxhold function. 14.Slowly vary the frequency of the signal generator between 5.95 GHz and 6.05 GHz until the spectrum analyzer display looks like that of Figure 6-16. Figure 6-16 A12 YTF Preselector Passband Filter Shape Keysight N9038A MXE Service Guide...
  • Page 251 This routine should take less than 5 minutes to run. This routine needs to be run whenever the A12 YTF Preselector or A15 Front End Control assembly is replaced, and can be run if the alignment of the passband centering needs to be adjusted. Keysight N9038A MXE Service Guide...

  • Page 252: A13 Rf Front End Assembly

    Chapter 15, “Block Diagrams.”. There are two different A13 RF Front End assemblies used in the N9038A - one for instruments with Option 503, 508, or 526 and one for instruments with Option 544. There are also multiple frequency bands for each instrument, the number of which will depend on the frequency range option the instrument has.
  • Page 253 W8 which connects it to the A8 Motherboard assembly. Refer Chapter 18, “Assembly Replacement Procedures.” for instructions on removing the front frame assembly. 3. Referring to Figure 6-17 Figure 6-18, disconnect W14 from the A13 RF Front End assembly Output (J7). Keysight N9038A MXE Service Guide...
  • Page 254 RF Downconverter Section RF Downconverter Section Troubleshooting Figure 6-17 A13 RF Front End Assembly Connections - Option 503, 508, & 526 Keysight N9038A MXE Service Guide...
  • Page 255 11.Tune the signal generator to 100 MHz with an amplitude of -30 dBm. 12.Verify that the signal amplitude on the spectrum analyzer display is approximately -25 dBm (5 dB gain), allowing for any additional test cable loss, as seen in Figure 6-19. Keysight N9038A MXE Service Guide...
  • Page 256 Turn on trace 2 of the spectrum analyzer and set it to use the Maxhold function. h. Slowly vary the frequency of the signal generator between 5.0 GHz and 5.2 GHz until the spectrum analyzer display looks like that of Figure 6-20. Keysight N9038A MXE Service Guide...
  • Page 257 Replace the A13A1 Bandpass Filter if its shape or insertion loss does not meet these requirements. Before replacing an A13 RF Front End assembly for any failure, refer to Chapter 8, “Front End Control.” for information on how to verify the control signals to it. Keysight N9038A MXE Service Guide...
  • Page 258 A13 RF Front End assembly itself. Before replacing an A13 RF Front End assembly for any failure, refer to Chapter 8, “Front End Control.” for information on how to verify the control signals to it. Keysight N9038A MXE Service Guide...
  • Page 259 10 GHz and SPAN, Zero Span. 12.Verify that the signal amplitude on the spectrum analyzer display is at least -10 dBm (15 dB gain), allowing for any additional test cable loss, as seen in Figure 6-22. Keysight N9038A MXE Service Guide...
  • Page 260 A13 RF Front End assembly itself. Before replacing an A13 RF Front End assembly for any failure, refer to Chapter 8, “Front End Control.” for information on how to verify the control signals to it. Keysight N9038A MXE Service Guide...

  • Page 261: L.o. Synthesizer

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide L.O. Synthesizer What You Will Find in This Chapter The following information is found in this chapter: A14 L.O. Synthesizer Assembly Description on page 262 A14 L.O. Synthesizer Purpose on page 262 A14 L.O.

  • Page 262: A14 L.o. Synthesizer Assembly Description

    The A14 LO Synthesizer assembly also contains a Field Programmable Gate Array (FPGA) chip that is programmed from an onboard PROM chip when the instrument is powered on. This code is updated if necessary when the instrument software is updated. Keysight N9038A MXE Service Guide...

  • Page 263: A14 L.o. Synthesizer Assembly Connections

    Not Used J100 Bias & Control A8 Motherboard J101 J200 4800 MHz Reference Signal A16 Reference J703 J740 1st LO Output A13 Front End J4 J741 JTAG Programming Figure 7-1 A14 L.O. Synthesizer Assembly Connections Keysight N9038A MXE Service Guide...

  • Page 264: A14 L.o. Synthesizer Assembly Troubleshooting

    — An instrument power supply voltage is not operating properly Solution: Verify all instrument power supply voltages. See Chapter 12, “Power Supply & Midplane”. — A14 LO Synthesizer assembly is defective Solution: Replace the A14 LO Synthesizer assembly Keysight N9038A MXE Service Guide...

  • Page 265: Assembly Status Leds

    DS3 LED. If this LED is intermittently on by itself it may not be a problem. Frequency Unlocked Verify that the 4800 MHz reference signal from the A16 Reference assembly is of the correct frequency and power level (See Chapter 9, “Reference Assembly.”.) Keysight N9038A MXE Service Guide...

  • Page 266: Frequency And Amplitude Of The 1St Lo Output

    Freq, 50 MHz and SPAN, Zero Span. 6. Verify that the frequency of the 1st LO signal at J740 is 5172.5 MHz and that the amplitude is between +13 and +18 dBm as shown in Figure 7-3. Keysight N9038A MXE Service Guide...
  • Page 267 1st LO frequency and amplitude level across its tuning range. Table 7-3 Instrument Input versus 1st LO Tune Frequency Instrument Input Frequency 1st LO Frequency 50 MHz 5,172.5 MHz 3.5 GHz 8,622.5 MHz 3.65 GHz 3,922.5 MHz Keysight N9038A MXE Service Guide...
  • Page 268 L.O. Synthesizer A14 L.O. Synthesizer Assembly Troubleshooting Keysight N9038A MXE Service Guide...

  • Page 269: Front End Control

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide Front End Control What You Will Find in This Chapter The following information is found in this chapter: 1. Theory of operation for the Front End Controller Assembly at the assembly level.

  • Page 270: A15 Front End Control Description

    The A15 Front End Control assembly also contains a Field Programmable Gate Array (FPGA) chip that is programmed from an onboard PROM chip when the instrument is powered on. This code is updated if necessary when the instrument software is updated. Keysight N9038A MXE Service Guide...

  • Page 271: A15 Front End Control Assembly Connections

    A3 Digital IF J15 A25 Wideband Analog IF J101 (Option B85) J902 IF Input A13 Front End J7 J903 EXT IF IN A13 Front End J13 J1100 AUX IF Output Rear Panel AUX IF OUT J1300 Not Used Keysight N9038A MXE Service Guide...
  • Page 272 Front End Control A15 Front End Control Description Figure 8-1 A15 Enhanced Front End Control Assembly Connections Keysight N9038A MXE Service Guide...
  • Page 273 J300 Not Used J301 YTF Preselector Control A12 YTF J1 J302 Not Used J800 Not Used J801 Attenuator Control A9 & A10 Control Figure 8-2 A15 Front End Control Assembly Connections (Serial Prefix < MY/SG5322) Keysight N9038A MXE Service Guide...

  • Page 274: A15 Front End Control Assembly Troubleshooting

    — An instrument power supply voltage is not operating properly Solution: Verify all instrument power supply voltages. See Chapter 12, “Power Supply & Midplane.”. — A15 Front End Control assembly is defective Solution: Replace the A15 Front End Control assembly Keysight N9038A MXE Service Guide...

  • Page 275: Assembly Control Verification - (Option 503, 508, & 526 Only)

    Front End components of the instrument a test board is required and has been made available. A kit containing this test board and the required cables can be purchased as part number N9020-60005 from http://www.keysight.com/find/parts. The contents of this kit are contained in Table 8-3.
  • Page 276 Front End Control A15 Front End Control Assembly Troubleshooting Figure 8-3 Front End Control Test Board Keysight N9038A MXE Service Guide...

  • Page 277: A9 Input Attenuator A Control - (Option 503, 508, & 526 Only)

    LEDs, plus one for the status of the +25V power supply, as can be seen in Figure 8-5. Figure 8-4 A9 Input Attenuator A Diagram Figure 8-5 A9 Input Attenuator A Control Front End Test Board LEDs Keysight N9038A MXE Service Guide...
  • Page 278 6. Turn the instrument auto alignment routine off by pressing System, Alignments, Auto Align, Off. 7. Tune the instrument to a Center Frequency of 50 MHz with a Span of 0 Hz by pressing FREQ, 50 MHz and SPAN, Zero Span. Keysight N9038A MXE Service Guide...
  • Page 279 Attenuator - 2 dB instrument setting. If the state of the status LEDs is correct proceed to the next step. If not, there is most likely a problem with the A15 Front End Control assembly. Keysight N9038A MXE Service Guide...
  • Page 280 17.If no trouble has been found with the control logic coming from the A15 Front End Control assembly, yet there is still a problem with the A9 Input Attenuator A, refer to Chapter 5, “RF Preselector Section.” for further troubleshooting information on the A9 Input Attenuator A itself. Keysight N9038A MXE Service Guide...

  • Page 281: A10 Input Attenuator B Control - (Option 503, 508, & 526 Only)

    LEDs, plus one for the status of the +25V power supply, as can be seen in Figure 8-8. Figure 8-7 A10 Input Attenuator B Diagram Figure 8-8 A10 Input Attenuator B Control Front End Test Board LEDs Keysight N9038A MXE Service Guide...
  • Page 282 A10 Input Attenuator B Control Logic Instrument Setting DS18 DS17 DS19 DS20 DS10 Mode Preset Mechanical Attenuator - 6 dB Mechanical Attenuator - 10 dB Mechanical Attenuator - 20 dB Mechanical Attenuator - 30 dB Mechanical Attenuator - 66 dB Keysight N9038A MXE Service Guide...
  • Page 283 17.If no trouble has been found with the control logic coming from the A15 Front End Control assembly, yet there is still a problem with the A10 Input Attenuator B, refer to Chapter 5, “RF Preselector Section.” for further troubleshooting information on the A10 Input Attenuator B itself. Keysight N9038A MXE Service Guide...

  • Page 284: A11 Rf Switch / High Band Preamp Control - (Option 503, 508, & 526 Only)

    The status of these controls can be measured on the Front End Control Test board assembly with the use of four test points, In1A, In2A, In1B, and In2B, as can be seen in Figure 8-10. Figure 8-9 A11 RF Switch / High Band Preamp Diagram Keysight N9038A MXE Service Guide...
  • Page 285 4. Place the Front End Control Test board on a non-conductive surface. 5. Turn the instrument on and allow it to complete its boot up process, ignoring any alignment failures. 6. Turn the instrument auto alignment routine off by pressing System, Alignments, Auto Align, Off. Keysight N9038A MXE Service Guide...
  • Page 286 If not, there is most likely a problem with the A15 Front End Control assembly. 9. Tune the instrument to a frequency of 1 GHz with a span of 0 Hz by pressing FREQ, 1 GHz, and SPAN, Zero Span. Keysight N9038A MXE Service Guide...
  • Page 287 Front End Control assembly, yet there is still a problem with the A11 RF Switch / High Band Preamp assembly, refer to Chapter 6, “RF Downconverter Section.” for further troubleshooting information on the A11 RF Switch / High Band Preamp assembly itself. Keysight N9038A MXE Service Guide...

  • Page 288: A12 Ytf Preselector Control - (Option 508 & 526 Only)

    Test board can get VERY HOT. Be careful not to touch them or place any combustible objects in contact with them. Also, do not clip test leads to P8 and leave the instrument unattended while powered on. Figure 8-11 A12 YTF Preselector Control Front End Test Board Keysight N9038A MXE Service Guide...
  • Page 289 Test board can get VERY HOT. Be careful not to touch them or place any combustible objects in contact with them. Also, do not clip test leads to P8 and leave the instrument unattended while powered on. Keysight N9038A MXE Service Guide...
  • Page 290 A15 Front End Control assembly, yet there is still a problem with the A12 YTF Preselector assembly, refer to Chapter 6, “RF Downconverter Section.” for further troubleshooting information on the A12 YTF Preselector assembly itself. Keysight N9038A MXE Service Guide...

  • Page 291: A12 Ytf Preselector Alignment

    A15 Front End Control assembly. 2. Then turn the instrument on and allow it to complete its boot up process. 3. Run the A12 YTF Preselector alignment routine by pressing System, Alignments, More, Advanced, Characterize Preselector. Keysight N9038A MXE Service Guide...

  • Page 292: A13 Rf Front End Assembly Control - (Option 503, 508, & 526 Only)

    Front End Test board that can get VERY HOT. Be careful not to touch them or place any combustible objects in contact with them. Also, do not leave the instrument unattended while powered on with the Front End Test board connected in this manner. Keysight N9038A MXE Service Guide...
  • Page 293 If one or more of the power supplies is not on verify the A6 Power Supply output voltages before replacing the A15 Front End Control assembly. For information on verifying the A6 power supply output voltages see Chapter 12, “Power Supply & Midplane.”. Keysight N9038A MXE Service Guide...
  • Page 294 If neither the A11 RF Switch / High Band Preamp assembly nor the Front End Test board is connected to the A15 Front End Control assembly J103 the test point voltages for the A13 RF Front End assembly will not be correct. Keysight N9038A MXE Service Guide...
  • Page 295 15 step 16 for the rest of the Frequency values listed in Table 8-11. 18.Tune the instrument to a frequency of 20 GHz (1 GHz for Option 503 and 508) by pressing FREQ, 20 GHz. Keysight N9038A MXE Service Guide...
  • Page 296 A15 Front End Control assembly, yet there is still a problem with the A13 RF Front End assembly, refer to Chapter 6, “RF Downconverter Section.” for further troubleshooting information on the A13 RF Front End assembly itself. Keysight N9038A MXE Service Guide...

  • Page 297: If Switching

    The 322.5 MHz IF signal routing for the A2 Analog IF output of the A15 Enhanced Front End Control board can be seen in the solid heavy blue line in Figure 8-13. Figure 8-13 322.5 MHz IF Switching to A2 Analog IF Keysight N9038A MXE Service Guide...
  • Page 298 10.Verify that the amplitude of the 322.5 MHz signal at A15 J900 is equal to that shown in Figure 8-14, +/- 3 dB. Figure 8-14 A15 Enhanced Front End Control Assembly 322.5 MHz IF Output Keysight N9038A MXE Service Guide...
  • Page 299 The 300 MHz IF signal routing for the A25 Wideband Analog IF output of the A15 Enhanced Front End Control board can be seen in the solid heavy blue line in Figure 8-15. Figure 8-15 300 MHz IF Switching to A25 Wideband Analog IF Keysight N9038A MXE Service Guide...
  • Page 300 Attenuation, 10 dB. 10.Switch to the 85 MHz IF Path by pressing Mode Setup, IF Path, 85 MHz. 11.Disconnect W52 from A15 J901 as shown in Figure 8-6. 12.Connect a spectrum analyzer to A15 J901. Keysight N9038A MXE Service Guide...
  • Page 301 If the input signal is not at the correct level see Chapter 6, “RF Downconverter Section.” for instructions on how to determine the cause of this problem. 15.Reconnect W52 to A15 J901 as shown in Figure 8-6. Keysight N9038A MXE Service Guide...

  • Page 302: Aux If Output (Option Cr3)

    Attenuation, 10 dB. 7. Turn the Auxiliary IF Output on by pressing Input/Output, Output Config, Aux IF Out, Second IF (322.5 MHz). 8. Connect a spectrum analyzer to the rear panel AUX IF OUT port. Keysight N9038A MXE Service Guide...
  • Page 303 16.Set the input attenuation to 10 dB by pressing AMPTD Y Scale, Attenuation, 10 dB. 17.Turn the Auxiliary IF Output on by pressing Input/Output, Output Config, Aux IF Out, Second IF (322.5 MHz). 18.Disconnect W22 from A15 J1100 as shown in Figure 8-6. Keysight N9038A MXE Service Guide...
  • Page 304 Enhanced Front End Control Assembly has a problem. If the input signal is not at the correct level see Chapter 6, “RF Downconverter Section.” for instructions on how to determine the cause of this problem. Keysight N9038A MXE Service Guide...

  • Page 305: Reference Assembly

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide Reference Assembly What You Will Find in This Chapter The following information is presented in this chapter: 1. Theory of operation of the Reference section. 2. Isolating the cause of a hardware problem by verifying the functionality of assemblies in the Reference sections.

  • Page 306: A16 Reference Assembly Description

    100 MHz VCXO PLL and the 2400 MHz CRO PLL is phase locked or unlocked. Each oscillator (10 MHz, 100 MHz, 2400 MHz) is monitored for the presence of RF power (dead/alive status). Keysight N9038A MXE Service Guide...

  • Page 307: A16 Reference Assembly Description

    A25 Wideband Analog IF J301 J726 Step Calibrator Input A3 High Perf. Digital IF J17 Input Input A25 Wideband Analog IF J806 Serial Prefix < MY/SG5522 a. Only used for instruments with Option B85, 85 MHz Analysis Bandwidth Keysight N9038A MXE Service Guide...
  • Page 308 Reference Assembly A16 Reference Assembly Description Figure 9-1 A16 Reference Board Assembly Connections Keysight N9038A MXE Service Guide...

  • Page 309: A16 Reference Assembly Troubleshooting

    Table 9-2 lists the diagnostic LEDs and what their status indicates. A blinking red LED typically indicates that an unleveled condition exists. The number of blinks indicates what circuitry is unleveled, as indicated in Table 9-2. Keysight N9038A MXE Service Guide...
  • Page 310 Green 2.4 GHz Reference Locked On = Locked Off = Unlocked A16A1DS5 Green 2.4 GHz VCXO Alive On = Yes Off = No A16A1DS6 Yellow Program Code Loading On = Loading Code Off = Ready Keysight N9038A MXE Service Guide...

  • Page 311: Assembly Output Signal Frequency & Amplitude Verification

    −28 dBm 2nd LO (Low Band) J702 4800 MHz +11 dBm 1st LO Reference J703 4800 MHz +3 dBm Wideband IF Reference J718 2400 MHz +7 dBm Figure 9-3 A16 Reference Board Assembly Cable Locations Keysight N9038A MXE Service Guide...

  • Page 312: Digital If Reference (10 Mhz)

    2. Verify with a spectrum analyzer that the frequency and amplitude of the Digital IF Reference signal at J710 is equal to that specified for it in Table 9-3, as shown in Figure 9-4. Figure 9-4 A16 Reference Assembly Digital IF Reference (10 MHz) Keysight N9038A MXE Service Guide...

  • Page 313: 50 Mhz Calibrator

    3. Verify with a spectrum analyzer that the frequency and amplitude of the 50 MHz Calibrator signal at J701 is equal to that specified for it in Table 9-3, as shown in Figure 9-5. Figure 9-5 A16 Reference Assembly 50 MHz Calibrator Keysight N9038A MXE Service Guide...

  • Page 314: E-Cal Reference

    3. Verify with a spectrum analyzer that the frequency and amplitude of the E-Cal Reference signal at J705 is equal to that specified for it in Table 9-3, as shown in Figure 9-6. Figure 9-6 A16 Reference Assembly E-Cal Reference Keysight N9038A MXE Service Guide...

  • Page 315: Digital If Reference (100 Mhz)

    2. Verify with a spectrum analyzer that the frequency and amplitude of the Digital IF Reference signal at A16J716 is equal to that specified for it in Table 9-3, as shown in Figure 9-7. Figure 9-7 A16 Reference Assembly Digital IF Reference (100 MHz) Keysight N9038A MXE Service Guide...

  • Page 316: 3Rd Lo

    2. Verify with a spectrum analyzer that the frequency and amplitude of the 3rd LO signal at J711 is equal to that specified for it in Table 9-3, as shown Figure 9-8. Figure 9-8 A16 Reference Assembly 3rd LO Output Keysight N9038A MXE Service Guide...

  • Page 317: 4.8 Ghz Calibrator

    3. Verify with a spectrum analyzer that the frequency and amplitude of the 4.8 GHz Calibrator signal at J701 is equal to that specified for it in Table 9-3, as shown in Figure 9-9. Figure 9-9 A16 Reference Assembly 4.8 GHz Calibrator Keysight N9038A MXE Service Guide...

  • Page 318: 1St Lo Reference

    2. Verify with a spectrum analyzer that the frequency and amplitude of the 1st LO Reference signal at J703 is equal to that specified for it in Table 9-3, as shown in Figure 9-10. Figure 9-10 A16 Reference Assembly 1st LO Reference Keysight N9038A MXE Service Guide...

  • Page 319: 2Nd Lo (Low Band)

    2. Verify with a spectrum analyzer that the frequency and amplitude of the 2nd LO (Low Band) signal at J702 is equal to that specified for it in Table 9-3, as shown in Figure 9-11. Figure 9-11 A16 Reference Assembly 2nd LO (Low Band) Keysight N9038A MXE Service Guide...

  • Page 320: Wideband If Reference

    A16 Reference assembly itself, as long as the A6 Power Supply assembly is functioning properly. See Chapter 12, “Power Supply & Midplane” if there are any questions about this. Keysight N9038A MXE Service Guide...

  • Page 321: 10 Analog & Digital If

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide 10 Analog & Digital IF What You Will Find in This Chapter The following information is presented in this chapter: 1. Theory of operation of the IF section. 2. Isolating the cause of a hardware problem by verifying the functionality of assemblies in the IF section signal path.

  • Page 322: A2 Analog If Assembly Description

    — The through path is selected in IQ Analyzer Mode and wide-band demod. — The 12 MHz ceramic bandpass filter is used for normal Signal Analyzer swept and FFT operation. — The 300 kHz Surface Acoustic Wave (SAW) is used for ACP modes. Keysight N9038A MXE Service Guide...
  • Page 323 4.3 kHz to 27 kHz 75 kHz Crystal Narrow 1 Hz to 3.9 kHz 10 kHz In IQ Analyzer mode or in Spectrum Analyzer mode with Sweep Type of FFT, the analyzer span setting determines the pre-filter settings. Keysight N9038A MXE Service Guide...

  • Page 324: Overall A2 Analog If Assembly Resolution Bandwidth

    12 MHz 430 kHz to 8 MHz 1 MHz 180 kHz to 390 kHz 300 kHz 30 kHz to 160 kHz 75 kHz 4.3 kHz to 27 kHz 10 kHz 1 Hz to 3.9 kHz Keysight N9038A MXE Service Guide...

  • Page 325: A2 Analog If Assembly Connections

    Not Used J601 IF Output A3 Digital IF J19 22.5 MHz J800 JTAG Programming J810 Not Used J820 Bias and Control A3 Digital IF J20 J850 Not Used Figure 10-1 A2 Analog IF Assembly Connections Keysight N9038A MXE Service Guide...

  • Page 326: A2 Analog I.f. Troubleshooting

    Diagrams”) there are many different signal paths through this assembly, each of which includes a bandpass filter with a different bandwidth. There is also a step gain amplifier that can be used with any of these filter paths. Keysight N9038A MXE Service Guide...

  • Page 327: A2 Analog If Filter Path Switching

    J19 of the A3 Digital IF assembly. 2. Turn the instrument on and allow it to complete its boot up process. 3. Remove W17 from the A3 Digital IF assembly J19 as shown in Figure 10-2. Keysight N9038A MXE Service Guide...
  • Page 328 10.Set the step gain to Low by pressing Meas Setup, More, Swept IF Gain, Low Gain. 11.Verify that the 22.5 MHz IF output from the A2 Analog IF assembly measures between -21 and -29 dBm as shown in Figure 10-3. Keysight N9038A MXE Service Guide...
  • Page 329 12.Set the step gain to High by pressing Meas Setup, More, Swept IF Gain, High Gain. 13.Verify that the 22.5 MHz IF output from the A2 Analog IF assembly measures between -11 and -19 dBm as shown in Figure 10-4. Keysight N9038A MXE Service Guide...

  • Page 330: A2 Analog If Filter Path Passband Shape

    22.5 MHz output will be measured on the other end of the cable coming from this assembly, which is connected to J19 of the A3 Digital IF assembly. 2. Turn the instrument on and allow it to complete its boot up process. Keysight N9038A MXE Service Guide...
  • Page 331 Figure 10-5. 14.Repeat steps 9 through 13 for the remainder of the Filter Paths listed in Table 10-5 with the Resolution Bandwidth and Spectrum Analyzer Span listed in the table. Keysight N9038A MXE Service Guide...
  • Page 332 300 kHz 100 kHz 1 MHz Figure 10-7 75 kHz 10 kHz 500 kHz Figure 10-8 10 kHz 3 kHz 50 kHz Figure 10-9 Figure 10-5 A2 Analog IF 12 MHz Filter Path Passband Shape Keysight N9038A MXE Service Guide...
  • Page 333 Analog & Digital IF A2 Analog I.F. Troubleshooting Figure 10-6 A2 Analog IF 1 MHz Filter Path Passband Shape Figure 10-7 A2 Analog IF 300 kHz Filter Path Passband Shape Keysight N9038A MXE Service Guide...
  • Page 334 Analog & Digital IF A2 Analog I.F. Troubleshooting Figure 10-8 A2 Analog IF 75 kHz Filter Path Passband Shape Figure 10-9 A2 Analog IF 10 kHz Filter Path Passband Shape Keysight N9038A MXE Service Guide...

  • Page 335: A2 Analog If 25 Mhz Filter Path (Option B25 Only)

    12.Set the spectrum analyzer such that trace 1 is in Clear Write and trace 2 is in Maxhold. 13.Vary the frequency of the signal generator above and below 50 MHz until the resolution bandwidth filter shape has been drawn out on the spectrum analyzer screen as shown in Figure 10-10. Keysight N9038A MXE Service Guide...
  • Page 336 Analog & Digital IF A2 Analog I.F. Troubleshooting Figure 10-10 A2 Analog IF 25 MHz Filter Path Passband Shape Keysight N9038A MXE Service Guide...

  • Page 337: A3 Digital I.f. Assembly Description

    — Capture memory for complex signals — Noise Source Control — Dither for final IF — Provides the alignment sequence generator for wide band alignments — Provides wide band Comb Calibration Signal — Trigger interpolation and associated alignment Keysight N9038A MXE Service Guide...

  • Page 338: A3 Digital If Assembly Description

    Various external noise sources can be connected to the rear panel of the instrument. These noise sources require a very accurate 28 volt DC power supply. The 28 volt BNC output connector is used with the 346 series noise sources. Keysight N9038A MXE Service Guide...

  • Page 339: A3 Digital If Assembly Connections

    10 MHz Reference In A16 Reference J716 100 MHz IF Input 322.5 MHz A15 Front End Control J901 Not Used Step Cal Output A16 Reference J726 Not Used IF Input A2 Analog IF J601 22.5 MHz Keysight N9038A MXE Service Guide...
  • Page 340 Analog Card Cage A8 Motherboard J11 PCI Card Cage A8 Motherboard J12 a. IF Input comes from A25 Wideband Analog IF J102 if instrument has Option B85 Figure 10-11 A3 Digital IF Assembly Connections - Top Keysight N9038A MXE Service Guide...
  • Page 341 Analog & Digital IF A3 Digital I.F. Assembly Description Figure 10-12 A3 Digital IF Assembly Connections - Bottom Keysight N9038A MXE Service Guide...

  • Page 342: A3 Digital I.f. Troubleshooting

    — An instrument power supply voltage is not operating properly Solution: Verify all instrument power supply voltages. See Chapter 12, “Power Supply & Midplane”. — A3 Digital IF assembly is defective Solution: Replace the A3 Digital IF assembly Keysight N9038A MXE Service Guide...

  • Page 343: Assembly Functionality Verification

    Other than the 22.5 MHz IF input signal, these inputs and outputs can be found on the A3 Digital IF rear panel as illustrated in Figure 10-13. Figure 10-13 A3 Digital IF Assembly Rear Panel Connections Keysight N9038A MXE Service Guide...

  • Page 344: 22.5 Mhz If Signal Processing

    If both of these signals are of the correct frequency and amplitude and yet there is still no signal being processed and displayed on the instrument screen then the A3 Digital IF assembly is the most likely cause of the failure. Keysight N9038A MXE Service Guide...

  • Page 345: 10 Mhz Reference Output

    10 MHz. 3. Verify that the 10 MHz Reference Output frequency is accurate and that the amplitude is at least 0 dBm, as shown in Figure 10-14. Figure 10-14 A3 Digital IF 10 MHz Reference Output Keysight N9038A MXE Service Guide...

  • Page 346: Trigger Outputs

    Input/Output, More, Output Config, Trig 1 Out, Sweeping (HSWP). 6. Verify that the there is a signal on the oscilloscope screen who's voltage and width resembles that shown in Figure 10-15. Figure 10-15 A3 Digital IF Trigger Output Keysight N9038A MXE Service Guide...

  • Page 347: Trigger Inputs

    5. Change the instrument trigger to Trigger 1 In by pressing Trigger, External 6. Visually verify that the instrument is now sweeping once per second instead of the visually countless sweeps per second when the Trigger is set to Free Run. Keysight N9038A MXE Service Guide...

  • Page 348: Analog Output (Option Yas Only)

    8. Increase the instrument resolution bandwidth to 300 kHz by pressing BW, 300 kHz. 9. Verify that the on-screen signal resembles that shown in Figure 10-16. Figure 10-16 A3 Digital IF Analog Output Measurement Setup Keysight N9038A MXE Service Guide...
  • Page 349 11.Verify that the peak of the analog output has an amplitude of approximately +1 volt and resembles that shown in Figure 10-17. Figure 10-17 A3 Digital IF Analog Output 12.When finished, turn the instrument self-alignment routine back on by pressing System, Alignments, Auto Align, Normal. Keysight N9038A MXE Service Guide...

  • Page 350: Noise Source Output (Optional N9069A Software Required)

    Setup, Restore Mode Defaults. 6. Verify that the there is a signal on the oscilloscope screen who's voltage and pulse width resembles that shown in Figure 10-18. (The pulse width will vary as the instrument sweeps) Keysight N9038A MXE Service Guide...

  • Page 351: Smart Noise Source Interface (Optional N9069A Software Required)

    Meas Setup, ENR, Meas Table. The Serial # and Model ID softkey labels should be blank. 5. Verify that the current ENR Meas Table is blank by pressing Meas Setup, ENR, Meas Table, Edit. Keysight N9038A MXE Service Guide...
  • Page 352 A3 Digital IF Smart Noise Source - Model and Serial Numbers 8. Verify that the ENR Meas Table is now populated with the data from the Smart Noise Source, as illustrated in Figure 10-20, by pressing Meas Setup, ENR, Meas Table, Edit. Keysight N9038A MXE Service Guide...
  • Page 353 Analog & Digital IF A3 Digital I.F. Troubleshooting Figure 10-20 A3 Digital IF Smart Noise Source - ENR Data Keysight N9038A MXE Service Guide...
  • Page 354 Analog & Digital IF A3 Digital I.F. Troubleshooting Keysight N9038A MXE Service Guide...

  • Page 355: 11 Cpu & Disk Drive

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide 11 CPU & Disk Drive What You Will Find in This Chapter The following information is presented in this chapter: 1. Theory of operation of the CPU section. 2. Isolating the cause of a hardware problem by verifying the functionality of assemblies in the CPU section.

  • Page 356: A4 Processor Assembly Description

    A4 Processor Assembly Description A4 Processor Assembly Description There have been many different A4 Processor assemblies used in the N9038A MXE EMI Receiver over the years. The information in this chapter is for the N9038A-PC6 assembly, which is the current version of this assembly at the time this information was written.

  • Page 357: Power Supply Control

    — 1 x High Speed USB 2.0 Host Port — Gigabit Ethernet Port (RJ45) — DisplayPort Video Output — VGA Output — SD Memory Card Slot (Accessible only when A5 disk drive is removed) Figure 11-1 A4 Processor Assembly Rear Panel Connectivity Keysight N9038A MXE Service Guide...

  • Page 358: System Memory

    A5 disk drive assembly has been changed and the calibration database needs to be transferred to it. The SD memory card is field replaceable. See Chapter 17, “Replaceable Parts” for the correct replacement part number. Keysight N9038A MXE Service Guide...

  • Page 359: A4 Processor Board Assembly Troubleshooting

    Accessing BIOS Setup Utility To easily navigate the BIOS Setup Utility you will want to have an external USB keyboard connected to the instrument. Then, when the initial Keysight Technologies splash screen is displayed at power-up, press the key on the keyboard specified on the initial boot screen (typically the DEL key).

  • Page 360: A5 Disk Drive

    For information on how to backup this data see “Calibration Data Backup and Restore” on page 647. Keysight N9038A MXE Service Guide...

  • Page 361: Overview

    Data saved in this partition will not be lost if the recovery process is run. This partition is reserved for Keysight's use. The primary use of the E: drive is for storing of the instrument Calibration and Alignment data. Do not change or overwrite the files on this drive.

  • Page 362: Troubleshooting Software Related Issues

    To correct these issues there are two procedures that can be initiated to resolve a software related issue. — Reload the instrument application software. — Use the Recovery Process to reinstall the Windows operating system and instrument application software as it was when it left the factory. Keysight N9038A MXE Service Guide...

  • Page 363: Reloading The Instrument Application Software

    This procedure will not affect the instrument’s calibration or user files. If this does not resolve the boot issue, or the instrument never boots the Windows operating system proceed to the “Disk Drive Recovery Process”. Keysight N9038A MXE Service Guide...

  • Page 364: Disk Drive Recovery Process

    — Any data or programs saved on the D: or E: drives. This data will be retained on the drive and not altered by the recovery process. — Any updates that were made to the Keysight measurement application software. Calibration data is not lost during this process because it resides on the E drive partition.

  • Page 365: Using The Instrument Recovery System

    Using the Instrument Recovery System 1. Make sure the instrument is turned off. 2. Turn on the instrument. 3. After the “Keysight Technologies” screen is displayed the following screen contents will be displayed for 5 seconds. Figure 11-2 4. Press the down arrow key to move the highlight to “Instrument Image Recovery System”, press the Enter key.

  • Page 366: Replacing The Instrument Disk Drive

    Disk Drive Recovery Process Replacing the instrument disk drive If the above two procedures did not resolve the booting issue. The disk drive should be replaced. Refer to the “Disk Drive” replacement section on page 596. Keysight N9038A MXE Service Guide...

  • Page 367: 12 Power Supply & Midplane

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide 12 Power Supply & Midplane What You Will Find in This Chapter The following information is presented in this chapter: 1. Theory of operation of the Power Supply/Midplane section.

  • Page 368: A6 Power Supply Description

    A7 Midplane Board assembly. See the “A7 Midplane Board Assembly Description” on page 373 for detailed information on the location of each. Keysight N9038A MXE Service Guide...
  • Page 369 AC coupled analog signal going to the supply that is used to frequency modulate the power supply switching frequency for the purpose of lowering any power supply related interference. The DITHER signal is generated on the A7 Midplane board assembly. Keysight N9038A MXE Service Guide...
  • Page 370 Thermal Protection The A6 Power Supply assembly will protect itself by shutting down if it overheats. It will also reset itself with no user interaction after the temperature is reduced by approximately 10 degrees C. Keysight N9038A MXE Service Guide...

  • Page 371: A6 Power Supply Assembly Troubleshooting

    If all of these supplies are working properly this output line will be at a TTL high level. If this output is not at a TTL High level the instrument CPU will not come out of its reset state and will not Keysight N9038A MXE Service Guide...
  • Page 372 FAULT_L LED. See the A7 Midplane Board AssemblyTroubleshooting section in this chapter for detailed information on the location of this test point and LED as well as the expected status for both when the instrument is operating properly. Keysight N9038A MXE Service Guide...

  • Page 373: A7 Midplane Board Assembly Description

    A6 Power Supply assembly. This is used to frequency modulate the power supply switching frequency for the purpose of lowering any power supply related interference. — Circuitry to phase lock the A4 Processor assembly CPU clock to the instrument reference frequency. Keysight N9038A MXE Service Guide...

  • Page 374: A7 Midplane Assembly Connections

    A6 Power Supply Assembly A8 Motherboard Assembly J108 A6 Power Supply Assembly A8 Motherboard Assembly J109 A6 Power Supply Assembly A8 Motherboard Assembly J110 A6 Power Supply Assembly A8 Motherboard Assembly Figure 12-1 A7 Midplane Board Assembly Connections Keysight N9038A MXE Service Guide...

  • Page 375: A7 Midplane Board Assembly Troubleshooting

    If for some reason the level of the power supply related interference is higher than normal this circuitry, or the A6 Power Supply assembly, could be suspect. Keysight N9038A MXE Service Guide...
  • Page 376 FAN_P Fan Positive Voltage ACOM 9.2 - 14.5 +3.3VA +3.3 Volt ACOM +3.35 ± Analog Supply 0.75 -5.2VA -5.2 Volt ACOM -5.2 ± 0.75 Analog Supply FAULT_L Power Supply Fault ACOM TTL High TTL High Keysight N9038A MXE Service Guide...
  • Page 377 Power Switch ACOM TTL High Green TTL High Pressed a. With AC mains connected to the instrument b. POWER_SW_L should only be at a TTL Low state when the front panel power switch is being pressed Keysight N9038A MXE Service Guide...
  • Page 378 Power Supply & Midplane A7 Midplane Board Assembly Troubleshooting Figure 12-2 A7 Midplane Board Assembly LEDs and Test Points Keysight N9038A MXE Service Guide...

  • Page 379: 13 Motherboard & Front Panel

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide 13 Motherboard & Front Panel What You Will Find in This Chapter The following information is found in this chapter: 1. Theory of operation of the Motherboard Assembly. 2. Theory of operation of the Front Panel Assembly.

  • Page 380: A8 Motherboard Assembly Description

    Chassis Fan - B1 J81/J82 A22 Radiated Filter J500 A1A2 Front Panel P1 (W8) J91/J92 Option Slot A3 Digital IF P1 J101 A14 LO Synthesizer J100 A3 Digital IF P2 J111 A15 Front End Controller J100 Keysight N9038A MXE Service Guide...
  • Page 381 Motherboard & Front Panel A8 Motherboard Assembly Description Figure 13-1 A8 Motherboard Assembly Connectors Keysight N9038A MXE Service Guide...

  • Page 382: A1 Front Panel Assembly

    The backlight power supply board provides the voltage required by the LCD backlights. A1A5 Front Panel Daughter Board The Front Panel Daughter Board provides the front panel USB connections as well as the headphone jack, probe power, and RF Input 1 LED. Keysight N9038A MXE Service Guide...

  • Page 383: 14 Optional Assemblies

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide 14 Optional Assemblies What You Will Find in This Chapter The following information is found in this chapter: A25 Wideband Analog IF Assembly Description page 384 A25 Wideband Analog IF Assembly Troubleshooting...

  • Page 384: A25 Wideband Analog If Assembly Description

    RF Burst Trigger The A25 Wideband Analog IF assembly also generates a built in RF Burst Trigger that is available when the 85 MHz IF path is selected in IQ Analyzer (Basic) mode. Keysight N9038A MXE Service Guide...
  • Page 385 2400 MHz J502 PCI Bus A8 Motherboard J32 J801 FPGA Diag J802 Bias and Control A8 Motherboard J31 J803 JTAG Programming J805 Step Cal Input A3 Digital IF J17 J806 Calibrator Output A16 Reference J726 Keysight N9038A MXE Service Guide...
  • Page 386 Optional Assemblies A25 Wideband Analog IF Assembly Description Figure 14-1 A25 Wideband Analog IF Connections Keysight N9038A MXE Service Guide...

  • Page 387: A25 Wideband Analog If Assembly Troubleshooting

    — An instrument power supply voltage is not operating properly Solution: Verify all instrument power supply voltages. See Chapter 12, “Power Supply & Midplane”. — A25 Wideband Analog IF assembly is defective Solution: Replace the A25 Wideband Analog IF assembly Keysight N9038A MXE Service Guide...

  • Page 388: Overall Wideband Signal Path Verification

    8. If the signal level measured is correct the overall basic functionality of the A25 Wideband Analog IF assembly is working as it should. If not, proceed with the rest of the verification listed in this section. Keysight N9038A MXE Service Guide...

  • Page 389: 2400 Mhz Reference Input Verification

    7. If the signal level measured is correct the reference input signal going to the A25 Wideband Analog IF assembly is of the correct level. If not, refer to Chapter 9, “Reference Assembly” and determine why the signal level coming from it is not correct Keysight N9038A MXE Service Guide...

  • Page 390: Input Signal Level Verification

    6. If the signal level measured is correct the input signal going to the A25 Wideband Analog IF assembly is of the correct level. If not, refer to Chapter 8, “Front End Control” and determine why the signal level coming from it is not correct. Keysight N9038A MXE Service Guide...

  • Page 391: Input Switching Verification

    J102 to be used by the A3 Digital IF 40 MHz IF path. However, since the N9038A MXE EMI Receiver does not have an option for a 40 MHz analysis bandwidth there is no time other than during internal alignments that this signal path is used.
  • Page 392 Figure 14-5 Input Switching Verification 8. If a signal similar to what is seen in Figure 14-5 is seen at some point during the alignment then the input switching circuitry would appear to be working properly. Keysight N9038A MXE Service Guide...

  • Page 393: A26 Wideband Digital If Assembly Description

    The FPGA is programmed both at power up as well as on the fly whenever the behavior of the signal processing needs to be altered. Multiple images used for programming the FPGA are stored locally in flash and can be swapped by the Power PC in 20 msec. Keysight N9038A MXE Service Guide...
  • Page 394 PCI bus whenever necessary without causing problems for the rest of the instrument. The local PCI bus connects to the Non-Transparent PCI Bridge, the FPGA, and the PCI to PCIe Bridge. Both PCI busses are 32 bit running at 33 MHz. Keysight N9038A MXE Service Guide...

  • Page 395: A26 Wideband Digital If Assembly Connections

    To/From Cable Frequency J501 Bias & Control A8 Motherboard J51 J502 PCI Bus A8 Motherboard J52 J778 Digital Signal Input A25 Wideband Analog IF J2 Digital J9000 PCIe/LVDS Figure 14-6 A26 Wideband Digital IF Connections Keysight N9038A MXE Service Guide...

  • Page 396: A26 Wideband Digital If Assembly Troubleshooting

    — An instrument power supply voltage is not operating properly Solution: Verify all instrument power supply voltages. See Chapter 12, “Power Supply & Midplane”. — A26 Wideband Digital IF assembly is defective Solution: Replace the A26 Wideband Digital IF assembly Keysight N9038A MXE Service Guide...

  • Page 397: Internal Alignment Failures

    Analog IF assembly by pressing Mode Setup, IF Path, 85 MHz 7. Measure the signal level by pressing Peak Search. The level of the 50 MHz calibrator should be -25.0 dBm ±0.3 dB, as shown in Figure 14-7. Keysight N9038A MXE Service Guide...
  • Page 398 A25 Wideband Analog IF troubleshooting information in this chapter and verify that the inputs to it are correct. If they are, the problem could be either the A25 Wideband Analog IF assembly or the A26 Wideband Digital IF assembly. Keysight N9038A MXE Service Guide...

  • Page 399: A30 Lisn Control Assembly Description

    The connections to and from the A30 LISN Control assembly are as listed in Table 14-3 and as illustrated in Figure 14-8. Table 14-3 A30 LISN Control Assembly Connections Port Description To/From Cable Control Output Rear Panel AUX I/O JTAG Programming Bias and Control A8 Motherboard J51 Keysight N9038A MXE Service Guide...
  • Page 400 Optional Assemblies A30 LISN Control Assembly Description Figure 14-8 A30 LISN Control Assembly Connectors Keysight N9038A MXE Service Guide...

  • Page 401: A30 Lisn Control Assembly Troubleshooting

    To verify the presence of the Option LSN license key press System, Show, System and look for the presence of N9038A-LSN LISN Hardware Support. If there is no entry for this a valid license will need to be obtained and installed.

  • Page 402: Output Data Line Status Leds

    Pin Number State Data 0 5 VDC Data 1 5 VDC Data 2 5 VDC Data 3 5 VDC Data 4 5 VDC Data 5 0 VDC Data 6 0 VDC Data 7 0 VDC Keysight N9038A MXE Service Guide...

  • Page 403: Rear Panel Aux I/O Outputs

    14-4. Verify that the output data line status LEDs on the A30 LISN Control assembly are also incorrect. If they are replace the A30 LISN Control assembly. If they are operating correctly replace the W9 ribbon cable assembly. Keysight N9038A MXE Service Guide...
  • Page 404 Optional Assemblies A30 LISN Control Assembly Troubleshooting Figure 14-9 Rear Panel AUX I/O Pinout Keysight N9038A MXE Service Guide...

  • Page 405: 15 Block Diagrams

    N9038A RF Preselector Conducted Band Signal Path N9038A RF Preselector Radiated Band Signal Path N9038A RF Section Option 503, 508, and 526 Band 0 N9038A RF Section Option 508, and 526 Band 1 N9038A RF Section Option 526 Band 2...
  • Page 406 Block Diagrams Block Diagrams Block Diagrams Keysight N9038A MXE Service Guide...

  • Page 407: Block Diagrams

    Block Diagrams Block Diagrams N9038A RF Input Option 503, 508, 526 Block Diagram Keysight N9038A MXE Service Guide...

  • Page 408: N9038A Rf Input Option 544 Block Diagram

    Block Diagrams Block Diagrams N9038A RF Input Option 544 Block Diagram Keysight N9038A MXE Service Guide...
  • Page 409 N9038A RF Preselector A21 RF Preselector Input Assembly Conducted Band Signal Path Alignment Sources C-Band Preamp & Overload Detector 20 Hz to 30 MHz -4 dB Broad Band Noise +20 dB - 8 dB Source (10 MHz – 4 GHz) -19.6 dB...
  • Page 410 N9038A RF Preselector A21 RF Preselector Input Assembly Radiated Band Signal Path Alignment Sources C-Band Preamp & Overload Detector 30 MHz to 3.6 GHz -4 dB Broad Band Noise +20 dB - 8 dB Source (10 MHz – 4 GHz) -19.6 dB...
  • Page 411 N9038A RF Section Option 503, 508 and 526 A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 3.6 to 26.5 GHz Path W3 to A9 & A10 Attenuator Control Sweep Ramp Output Not Used...
  • Page 412 N9038A RF Section Option 503, 508 and 526 Band 0 (20 Hz to 3.6 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 3.6 to 26.5 GHz Path W3 to A9 & A10...
  • Page 413 N9038A RF Section Option 508 and 526 Band 1 (3.5 to 8.4 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 -50 dBm 3.6 to 26.5 GHz Path W3 to A9 & A10...
  • Page 414 N9038A RF Section Option 526 Band 2 (8.3 to 13.6 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 -33 dBm 3.6 to 26.5 GHz Path W3 to A9 & A10 Attenuator Control...
  • Page 415 N9038A RF Section Option 526 Band 3 (13.5 to 17.1 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 -36 dBm 3.6 to 26.5 GHz Path W3 to A9 & A10 Attenuator Control...
  • Page 416 N9038A RF Section Option 526 Band 4 (17.0 to 26.5 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 -38 dBm 3.6 to 26.5 GHz Path W3 to A9 & A10 Attenuator Control...
  • Page 417 N9038A RF Section Option 544 A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 3.6 to 44 GHz Path W3 to A9 & A10 Attenuator Control Sweep Ramp Output Not Used J301 J800 High Band Preamp Ext.
  • Page 418 N9038A RF Section Option 544 Band 0 (20 Hz to 3.6 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 3.6 to 44 GHz Path W3 to A9 & A10 Attenuator Control...
  • Page 419 N9038A RF Section Option 544 Band 1 (3.6 to 8.4 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 -53 dBm 3.6 to 44 GHz Path W3 to A9 & A10 Attenuator Control...
  • Page 420 N9038A RF Section Option 544 Band 2 (8.3 to 13.6 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 -35 dBm 3.6 to 44 GHz Path W3 to A9 & A10 Attenuator Control...
  • Page 421 N9038A RF Section Option 544 Band 3 (13.5 to 17.1 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 -35 dBm 3.6 to 44 GHz Path W3 to A9 & A10 Attenuator Control...
  • Page 422 N9038A RF Section Option 544 Band 4 (17.0 to 26.5 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 -36 dBm 3.6 to 44 GHz Path W3 to A9 & A10 Attenuator Control...
  • Page 423 N9038A RF Section Option 544 Band 5 (26.4 to 34.5 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 -39 dBm 3.6 to 44 GHz Path W3 to A9 & A10 Attenuator Control...
  • Page 424 N9038A RF Section Option 544 Band 6 (34.4 to 44 GHz) A11 RF Switch / High Band Preamp A12 YTF A15 Front End Control From SW2 P4 -40 dBm 3.6 to 44 GHz Path W3 to A9 & A10 Attenuator Control...
  • Page 425 To A16J726 IF SYSTEM BLOCK DIAGRAM (A25J805 if Option B85) To A16J726 From A15J901 (A25J102 if Option B85) A3 DIGITAL IF STEP ALIGN OUT WB_ALIGN_DATA N.C. N.C. From A15J901 40 MHz BW ST GT PECL -> ECL FELDSPAR_CLK 250 MHz CF FELDSPAR Noise Source ADC2...
  • Page 426 N9038A Wideband IF Section Option B85 To A3 J15 250 MHz J102 A25 Wideband Analog IF From A15 J901 J101 Amplified Bandpass Filter FPGA 140 MHz BW REF Detector 1 REF Detector 2 ADC Diag BCT Trigger Diag J803 Trigger Level...
  • Page 427 IF SYSTEM BLOCK DIAGRAM (Serial Prefix < MY/SG5322) A3 DIGITAL IF 10 MHz 10 MHz OUT From (BNC) A16J710 Capture IF 10 MHz REF Memory 10 MHz LVDS NOISE SOURCE To A3 DRIVE +28V Noise (BNC) 300 kHz/800 kHz A2 ANALOG IF Source 12 MHz Drive...

  • Page 428: Lo Synthesizer Block Diagram

    Block Diagrams Block Diagrams LO Synthesizer Block Diagram Keysight N9038A MXE Service Guide...

  • Page 429: Reference Block Diagram

    Block Diagrams Block Diagrams Reference Block Diagram Keysight N9038A MXE Service Guide...

  • Page 430: Mxe Computer Block Diagram

    Block Diagrams Block Diagrams MXE Computer Block Diagram Keysight N9038A MXE Service Guide...
  • Page 431 Block Diagrams Block Diagrams Keysight N9038A MXE Service Guide...

  • Page 432: 16 Service And Diagnostics Menus

    2. “Secure Service Access” - Access to the Service menu is restricted to the service technician. This prevents the casual user from accessing and using these features. The intention is to provide this level of access to Keysight Service Centers as well as any self-maintaining customer who purchases the Service Guide.

  • Page 433: Secure Service Access

    Once access has been gained, it will persist within the current instance of the instrument application. If the user exits the instrument application, the Service Code will need to be entered again in order to gain access to the Service Menu. Keysight N9038A MXE Service Guide...

  • Page 434: Service Menus

    Service and Diagnostics Menus Service Menus Service Menus Figure 16-1 Service Menu Figure 16-2 Diagnostics Menu Diagnostics Diagnostics Hardware Show Hdwr Statistics Statistics Keysight N9038A MXE Service Guide...
  • Page 435 Service and Diagnostics Menus Service Menus Figure 16-3 Corrections Menu Figure 16-4 Lock Functions Menu Keysight N9038A MXE Service Guide...
  • Page 436 Service and Diagnostics Menus Service Menus Figure 16-5 Alignments Menu Keysight N9038A MXE Service Guide...
  • Page 437 30MHz–3.6GHz All Bands Band 3 20Hz-3.6GHz Band 0 Calibrator 30MHz-70MHz DDS Freq (DC–60 MHz) 30.00 MHz Band 1 70MHz-150MHz Noise Source (10MHz–4GHz) Band 2 150MHz-300MHz Band 3 300MHz-600MHz Band 4 600 MHz-1GHz Band 5 1GHz-2GHz Keysight N9038A MXE Service Guide...
  • Page 438 Band 2 Band 8 150kHz-1MHz 14MHz-17MHz Band 3 Band 9 1MHz-2MHz 17MHz-20MHz Band 4 Band 10 2MHz-5MHz 20MHz-24MHz Band 5 Band 11 5MHz-8MHz 24MHz-28MHz More More More 1 of 3 2 of 3 3 of 3 Keysight N9038A MXE Service Guide...
  • Page 439 Radiated Radiated Radiated Band Bands Tuned Band 0 Frequency 30MHz-70MHz 50.00 MHz Radiated Band Band 1 Band 0 70MHz-150MHz Band 2 150MHz-300MHz Band 3 300MHz-600MHz Band 4 600 MHz-1GHz Band 5 1GHz-2GHz Band 6 2GHz-3.6GHz Keysight N9038A MXE Service Guide...
  • Page 440 Service and Diagnostics Menus Service Menus Figure 16-9 Data Acquisition Control Menu Figure 16-10 AUX I/O Control Menu Keysight N9038A MXE Service Guide...

  • Page 441: Service Key Descriptions

    If an invalid Service Code is entered access will not be granted and you will see the message shown in Figure 16-12. You will need to accept this prompt and press the Service key again to re-enter the Service Code correctly. Figure 16-12 Incorrect Service Code Entry Keysight N9038A MXE Service Guide...

  • Page 442: Timebase

    Save permanently saves the current Timebase DAC setting to non-volatile memory. When this key is pressed a confirmation prompt, as shown in Figure 16-14, must be accepted in order for the new DAC value to be saved. Figure 16-14 Timebase DAC Save Confirmation Keysight N9038A MXE Service Guide...

  • Page 443: Corrections

    When Temperature Gain & Tilt is OFF, the Advisory Event “Flatness Temperature Gain & Tilt OFF” will be displayed. When Temperature Gain & Tilt is ON, the Advisory Event “Flatness Temperature Gain & Tilt OFF” will be cleared. Keysight N9038A MXE Service Guide...

  • Page 444: Lock Functions

    LO Band Lock is only available when the Band Lock is active. When LO band lock is selected, the Advisory Event “LO Band Locked: Band <x>” is displayed, where “x” is a value between 0 and 3. Keysight N9038A MXE Service Guide...

  • Page 445: Lo Control

    This menu contains items for controlling the operating behavior of alignment and the alignment reporting capabilities. Visible Align This replaces the “Aligning 1 or 10” alignment progress messages with messages that describe the alignment segment being executed. Align Log… Keysight N9038A MXE Service Guide...
  • Page 446 A failure of LO will set the Error Condition “Align LO failed”. A failure will not employ new LO alignment data. Successful completion of LO will clear the Error Condition “Align LO failed”. Keysight N9038A MXE Service Guide...
  • Page 447 This is exactly the same as the customer accessible System, Alignments, Align Now, RF with one exception: the alignment can be invoked even if a previous Align Now, All has not been executed (this key is available not grayed-out if using default alignment data). Keysight N9038A MXE Service Guide...

  • Page 448: Diagnostics

    Radiated Band, to run the Radiated filer alignments, and the turn the RF preselector alignment signals on and off. Band Lock Allows access to select either one the conducted, radiated, or through signal paths of the instrument for troubleshooting purposes. Keysight N9038A MXE Service Guide...
  • Page 449 Selects the 17 MHz to 20 MHz filter path Band 10 Selects the 20 MHz to 24 MHz filter path Band 11 Selects the 24 MHz to 28 MHz filter path Band 12 Selects the 28 MHz to 32 MHz filter path Keysight N9038A MXE Service Guide...
  • Page 450 Selects the 150 MHz to 300 MHz tunable filter path Band 3 Selects the 300 MHz to 600 MHz tunable filter path Band 4 Selects the 600 MHz to 1 GHz tunable filter path Band 5 Keysight N9038A MXE Service Guide...
  • Page 451 So these routines should only be run when absolutely necessary. Keysight N9038A MXE Service Guide...
  • Page 452 Will align the 300 MHz to 600 MHz radiated filter band Band 4 Will align the 600 MHz to 1 GHz radiated filter band Band 5 Will align the 1 GHz to 2 GHz radiated filter band Keysight N9038A MXE Service Guide...
  • Page 453 4 GHz. This is used to align the tunable filters of the A22 Radiated Filter assembly when a filter Characterization is run. It is also used when a 30 MHz to 3.6 GHz RF Preselector alignment is run. Turns off whatever calibrator source might be turned on Keysight N9038A MXE Service Guide...

  • Page 454: Aux I/O Control

    Rear Panel AUX I/O Connector Pinout With the use of a voltmeter along with the service menu the operation of each of the individual data lines to the rear panel connector as well as the supply voltages can be verified. Keysight N9038A MXE Service Guide...

  • Page 455: Diagnostics Key Description

    As shown in Figure 16-17, this will display the following instrument hardware statistics: — Mechanical relay switch counts — Mechanical attenuator switch counts — Instrument temperature extremes — Elapsed instrument on-time Figure 16-17 Hardware Statistical Information Keysight N9038A MXE Service Guide...

  • Page 456: 17 Replaceable Parts

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide 17 Replaceable Parts What You Will Find in This Chapter The following information is found in this chapter: 1. Part number tables for assemblies, mechanical parts, cables, front panel connectors, and labels.

  • Page 457: How To Order Parts

    — Description of where the part is located, what it looks like, and its function (if known) — Quantity required For a list of Keysight Technologies sales and service office locations, refer to “Contacting Keysight Technologies” on page Keysight N9038A MXE Service Guide...

  • Page 458: Replaceable Parts

    A1A4 Display Backlight Power Supply (Serial # ≥ MY/SG52260000) 0950-5235 (Serial # < MY/SG52260000) 0950-4635 A1A5 Front Panel Daughter Board N9038-63005 A1A6 Input 2 LED Board N9038-63006 A1MP1 Main Keypad E4410-40100 A1MP2 Display Keypad E4410-40101 Keysight N9038A MXE Service Guide...
  • Page 459 Backlight Power Supply (Serial # ≥ MY/SG52260000) W1312-60130 (Serial # < MY/SG52260000) W1312-60113 A1W3 Cable Assembly, Wire Harness, W1312-60131 Backlight Power Supply to LCD Analog IF Assembly (Serial # ≥ MY/SG53220000) N9020-60011 (Serial # < MY/SG53220000) E4410-60104 Keysight N9038A MXE Service Guide...
  • Page 460 33325-60020 RF Switch/High Band Preamp Assembly (Option 503, 508, and 526) E4410-60170 (Option 544) N9020-60051 YIG Tuned Filter (Option 503, 508, and 526) 5087-7382 (YTF) (Option 544) 5087-7383 A12MP1 Gap Pad - YTF Mounting 5022-7179 Keysight N9038A MXE Service Guide...
  • Page 461 (Serial # ≥ MY/SG55260000) N9020-60118 ( Serial # < MY/SG55260000) E4410-60188 Front End Control Assembly (Serial # ≥ MY/SG53220000) N9020-60172 (Serial # ≥ MY/SG52130014 & < MY/SG53220000) N9020-60098 ( Serial # < MY/SG52130014) E4410-60101 Reference Assembly N9020-60188 Keysight N9038A MXE Service Guide...
  • Page 462 Nut, Hex 1/4 - 36 thread, 0.125 in. thick (Option EXM) 2950-0223 J3MP3 Washer, lock, internal tooth, 1/4 in, 0.256 in (Option EXM) 2190-0067 Chassis Base N9038-00015 Chassis Side, Left (inner) W1312-00117 Chassis Side, Left (outer) - Fan Bracket W1312-00118 Keysight N9038A MXE Service Guide...
  • Page 463 W1312-40001 MP53-54 Retainer, Type-M Cable, Top N9038-40001 MP55-56 Retainer, Type-M Cable, Bottom N9038-40007 MP57 Cable Hold Down 1 (158 mm) 5023-1397 MP58 Cable Hold Down 2 (48 mm) 5023-1379 MP59 Label, Blank, (rear panel) N9020-80057 Keysight N9038A MXE Service Guide...
  • Page 464 Cable, Ribbon, Wideband Analog IF (A25) J2 8121-1854 to Wideband Digital IF (A26) J778 Reserved Cable, Wire Harness, (Serial # ≥ MY/SG52130014) N9020-60059 Front End Ctrl (A15) J300 to YTF (A12) J1 (Serial # < MY/SG52130014) E4410-60158 Reserved Keysight N9038A MXE Service Guide...
  • Page 465 Cable, Coaxial, Digital IF (A3) J17 to (Option B85) 8121-1401 Wideband Analog IF (A25) J805 Cable, Coaxial, Front End Assy (A13) J13 to (Option 503, 508, 526) 8121-2027 Front End Ctrl (A15) J903 (Option 544) 8121-2025 Keysight N9038A MXE Service Guide...
  • Page 466 Cable, Semi-Rigid, Radiated Filter Assy (A22) J300 to N9038-21308 RF Presel Input Assy (A21) J306 Cable, Semi-Rigid, RF Presel Input Assy (A21) J101 to Transfer (Option 503, 508, and 526) N9038-21307 Switch (SW2) Port 3 (Option 544) N9038-21335 Keysight N9038A MXE Service Guide...
  • Page 467 Cable, Coaxial, Reference (A16) J718 to (Option B85) Wideband Analog IF (A25) J301 8121-0152 Cable, Coaxial, Front End Control (A15) (Option B85) J901 to Wideband Analog IF (A25) J101 8121-1865 Hole Plug, Nylon, 0.5 D (BNC) 6960-0149 Keysight N9038A MXE Service Guide...
  • Page 468 Hole Plug, Nylon, 0.25 D (SMA) 6960-0076 Hole Plug, Nylon, 0.875 D (Type-N) 6960-0177 Edge Protector, Chassis Left and Right 0400-0018 Spiral Wrap, 0.250 IN OD; 0.160 IN ID, 0890-0025 Digital IF cables a. Not orderable. See A1A1. Keysight N9038A MXE Service Guide...
  • Page 469 Required Instrument Bottom Feet Kit (Standard) 5000-0913 Bottom Feet 5041-9167 Bottom Feet Key Lock 5021-2840 Rackmount Kit w/o Handles (Option 1CM) 5063-9215 Rackmount Kit w/ Handles (Option 1CP) 5063-9222 Instrument Front Handles (Option 1CN) 5063-9228 Keysight N9038A MXE Service Guide...
  • Page 470 Table 17-3 Attaching Hardware Attach Part Number Type Type Tool Torque Analog IF Assembly (A2) Digital IF Assembly (A3) 0515-0372 Pan Head M3 X 0.5 Torx T-10 9 inch-lbs (8 mm) Attenuators (A9 & A10) Attenuator Brackets 2 per 0515-0372 Pan Head M3 X 0.5 Torx T-10...
  • Page 471 Table 17-3 Attaching Hardware Attach Part Number Type Type Tool Torque Chassis Front Bracket Chassis Base (MP1) 0515-0372 Pan Head M3 X 0.5 Torx T-10 9 inch-lbs (MP8) (8 mm) Chassis Sides, Inner 0515-0372 Pan Head M3 X 0.5 Torx T-10 9 inch-lbs (MP2 &...
  • Page 472 Table 17-3 Attaching Hardware Attach Part Number Type Type Tool Torque Display Bracket (A1MP14) Front Frame (A1A1MP1) 0515-0372 Pan Head M3 X 0.5 Torx T-10 9 inch-lbs (8 mm) Disk Drive (A5) Disk Drive Tray (A5MP1) 0515-0372 Pan Head M3 X 0.5 Torx T-10 9 inch-lbs (8 mm)
  • Page 473 Table 17-3 Attaching Hardware Attach Part Number Type Type Tool Torque Front Panel Interface Board Front Frame (A1A1MP1) 0515-1521 Flat Head M3 X 0.5 Torx T-10 9 inch lbs. (A1A2) (5 mm) Front Panel Shield Front Frame (A1A1MP1) 0515-0372 Pan Head M3 X 0.5 Torx T-10 9 inch-lbs...
  • Page 474 Table 17-3 Attaching Hardware Attach Part Number Type Type Tool Torque Power Supply Bracket Chassis Sides, Inner 0515-0372 Pan Head M3 X 0.5 Torx T-10 9 inch-lbs (MP9) (MP2 & MP4) (8 mm) Chassis Sides, Outer 0515-0372 Pan Head M3 X 0.5 Torx T-10 9 inch-lbs (MP3 &...
  • Page 475 Table 17-3 Attaching Hardware Attach Part Number Type Type Tool Torque Top Brace (MP10) Chassis Sides, Inner 0515-0372 Pan Head M3 X 0.5 Torx T-10 9 inch-lbs (MP2 & MP4) (8 mm) Chassis Sides, Outer 0515-0372 Pan Head M3 X 0.5 Torx T-10 9 inch-lbs (MP3 &...

  • Page 476: Hardware

    A15 Front End Control Assembly N9020-60172 A25 Wideband Analog IF Assembly N9020-60044 A26 Wideband Digital IF Assembly N9020-60257 a. Most current part numbers shown. See Table 17-1 for a complete list of part numbers for older instruments. Keysight N9038A MXE Service Guide...
  • Page 477 External Hardware Item Description Part Number 1, 2 Strap Handle (includes screws) E8251-60067 Screw M4 X 0.7 (25 mm) 0515-1619 Instrument Rear Feet 5041-9611 Dress Cover W1312-00119 Bottom Feet 5041-9167 Bottom Feet Key Lock 5021-2840 Keysight N9038A MXE Service Guide...
  • Page 478 Screw M3 X 0.5 (8 mm) 0515-0372 Screw M3 X 0.5 (6 mm) 0515-1227 Screw M3 X 0.5 (8 mm) 0515-0372 Screw M3 X 0.5 (6 mm) 0515-1227 Screw M3 X 0.5 (6 mm) 0515-1227 Keysight N9038A MXE Service Guide...
  • Page 479 A4BT1 Battery, 3V, LI Manganese Dioxide (CR2032) 1420-0356 A4A1 Disk Drive Interconnect Board W1312-63079 Screw M3 x 0.5 (8 mm) 0515-0372 a. Most current part numbers shown. See Table 17-1 for a complete list of part numbers for older instruments. Keysight N9038A MXE Service Guide...
  • Page 480 Disk Drive Tray W1312-40078 A5MP2 Disk Drive Rear Panel W1312-00103 A5MP3 Disk Drive Assembly Handle 1440-0421 Screw M3 x 0.5 (8 mm) 0515-0372 Screw M2.5 x 0.45 (5 mm) 0515-2219 Screw M3 x 0.5 (6 mm) 0515-1227 Keysight N9038A MXE Service Guide...
  • Page 481 Cable, Semi-Rigid, Limiter Assy (A23) J103 to Coaxial Switch (SW1) Port 1 N9038-21301 Cable, Semi-Rigid, Coaxial Switch (SW1) Port C to Atten A (A9) Port 2 N9038-21303 Cable, Semi-Rigid, Atten A (A9) Port 3 to Atten B (A10) Port 2 N9020-20025 Keysight N9038A MXE Service Guide...
  • Page 482 Cable, Semi-Rigid, RF Switch/High Band Preamp (A11) J3 to YTF (A12) Input N9020-20123 Cable, Semi-Rigid, YTF (A12) Output to Front End Assy (A13) J9 N9020-20124 Cable, Semi-Rigid, Reference Assy (A16) J701 to Coaxial Switch (SW1) Port 2 N9038-21304 Keysight N9038A MXE Service Guide...
  • Page 483 Cable, Semi-Rigid, Atten B (A10) Port 1 to Transfer Switch (SW2) N9038-21333 Port 1 Cable, Semi-Rigid, RF Switch/High Band Preamp (A11) J3 to YTF N9010-20005 (A12) Input Cable, Semi-Rigid, YTF (A12) Output to Front End Assy (A13) J9 N9038-21338 Keysight N9038A MXE Service Guide...
  • Page 484 Cable, Semi-Rigid, RF Switch/High Band Preamp (A11) J2 to Front End N9038-21339 Assy (A13) J2 Cable, Semi-Rigid, RF Switch/High Band Preamp (A11) J3 to YTF (A12) N9010-20005 Input Cable, Semi-Rigid, Reference Assy (A16) J701 to Coaxial Switch (SW1) N9038-21304 Port 2 Keysight N9038A MXE Service Guide...
  • Page 485 Cable, Ribbon, RF Presel Input Assy (A21) J602 to Limiter Assy (A23) J108 N9038-60009 Cable, Ribbon, Front End Control (A15) J102 to Front End Assy (A13) J12 E4410-60156 Cable, Ribbon, Limiter Assy (A23) P2 to A1A5J1 & A1A6J1 N9038-60011 Keysight N9038A MXE Service Guide...
  • Page 486 Option 503, 508, & 526 N9020-20124 Option 544 N9038-21338 Cable, Semi-Rigid, Reference Assy (A16) J702 to Front End Assy (A13) J1 N9020-20022 Cable, Semi-Rigid, LO Synth Assy (A14) J740 to Front End Assy (A13) J4 N9020-20087 Keysight N9038A MXE Service Guide...
  • Page 487 Cable, Coaxial, Digital IF (A3) J17 to Reference Assy (A16) J726 8121-1859 Cable, Coaxial, Front End Control (A15) J901 to Wideband Analog IF (A25) 8121-1865 J101 a. Most current part numbers shown. See Table 17-1 for a complete list of part numbers for older instruments. Keysight N9038A MXE Service Guide...
  • Page 488 Cable, Semi-Rigid, Reference Assy (A16) J703 to LO Synth Assy (A14) N9038-21306 J200 Cable, Semi-Rigid, Reference Assy (A16) J702 to Front End Assy (A13) J1 N9020-20022 Cable, Semi-Rigid, Reference Assy (A16) J701 to Coaxial Switch (SW1) N9038-21304 Port 2 Keysight N9038A MXE Service Guide...
  • Page 489 Cable, Coaxial, Wideband Analog IF (A25) J806 to Reference (A16) J726 8121-0152 Cable, Coaxial, Reference (A16) J718 to Wideband Analog IF (A25) J301 8121-0152 Cable, Coaxial, Front End Control (A15) J901 to Wideband Analog IF (A25) 8121-1865 J101 Keysight N9038A MXE Service Guide...
  • Page 490 Cable, Semi-Rigid, RF Presel Input Assy (A21) J102 to Radiated Filter Assy N9038-21309 (A22) J100 Cable, Semi-Rigid, RF Presel Input Assy (A21) J101 to Transfer Switch (SW2) Port 3 Option 503, 508, & 526 N9038-21307 Option 544 N9038-21335 Keysight N9038A MXE Service Guide...
  • Page 491 Replaceable Parts Hardware Figure 17-14 AIF/DIF Cables Figure 17-15 AIF/DIF Cables, bottom Keysight N9038A MXE Service Guide...
  • Page 492 Cable, Coaxial, Reference Assy (A16) J711 to Analog IF (A2) J300 8121-1861 Cable, Coaxial, Reference Assy (A16) J716 to Digital IF (A3) J14 8121-1861 Cable, Coaxial, Digital IF (A3) J17 to Reference Assy (A16) J726 8121-1401 Keysight N9038A MXE Service Guide...
  • Page 493 Cable, Ribbon, Digital IF (A3) J100 to Analog IF (A2) J820 E4410-60162 A3W1 Cable Assembly, Wire Harness, Smart Noise Source N9020-60090 a. Most current part numbers shown. See Table 17-1 for complete list of part numbers for older instruments. Keysight N9038A MXE Service Guide...
  • Page 494 MP5 Chassis Side, Right (outer) N9020-00014 MP6 Rear Panel N9038-00100 MP19 Bracket, Attenuator A (Option 503, 508, & 526) E4449-00103 MP19 Bracket, Attenuator A and B (Option 544) N9038-01202 MP20 Bracket, Attenuator B (Option 503, 508, & 526) E4449-00103 Keysight N9038A MXE Service Guide...
  • Page 495 Replaceable Parts Hardware Figure 17-18 Cable Hold Downs Item Description Part Number MP57 Cable Hold Down 1 (158 mm) 5023-1397 MP58 Cable Hold Down 2 (48 mm) 5023-1379 Screw M3 X0.5 (8 mm) 0515-0372 Keysight N9038A MXE Service Guide...
  • Page 496 Replaceable Parts Hardware Figure 17-19 Motherboard Item Description Part Number A8 Motherboard Assembly N9030-63002 Screw M3 X0.5 (8 mm) 0515-0372 Keysight N9038A MXE Service Guide...
  • Page 497 Replaceable Parts Hardware Figure 17-20 Fan Hardware Item Description Part Number B1, B2, B3 3160-4199 MP15-17 Fan Guard 3160-0281 Rivet, Fan Mounting 0361-1272 Keysight N9038A MXE Service Guide...
  • Page 498 3.5 mm Input Connector Assembly (Option C35) N9038-60019 2.4 mm Input Connector Assembly (Option 544) N9030-60011 Cable, Semi-Rigid, RF Input 1 (J1) to Atten A (A9) Port 1 Standard N9038-21302 Option C35 N9038-21312 Option 544 N9038-21331 Keysight N9038A MXE Service Guide...
  • Page 499 Description Part Number Screw M3 X 0.5 (8 mm long) 0515-0372 J2MP1 EMI O-Ring 18.75 mm ID 8160-1637 Type-N Input Connector Assembly N9038-60021 Cable, Semi-Rigid, RF Input 2 (J2) to Limiter Assy (A23) J102 N9038-21300 Keysight N9038A MXE Service Guide...
  • Page 500 Replaceable Parts Hardware Figure 17-23 Front Frame Exploded View - LED Backlight Keysight N9038A MXE Service Guide...
  • Page 501 A1W2 Cable Assembly, Wire Harness, Front Panel Interface to Backlight W1312-60130 Power Supply A1W3 Cable Assembly, Wire Harness, Backlight Power Supply to LCD W1312-60131 A1MP20 Bracket, Input 2 LED Board N9038-21202 a. Non-orderable item, see A1A1. Keysight N9038A MXE Service Guide...
  • Page 502 Front Frame Parts - LED Backlight Item Description Part Number A1MP14 Display Bracket W1312-00145 A1A5 Front Panel Daughter Board N9038-63005 A1MP19 Shield, Front Panel Interface N9020-00051 Screw, M3 X 0.5 (8 mm) 0515-0372 A1A6 Input 2 LED Board N9038-63006 Keysight N9038A MXE Service Guide...
  • Page 503 A1A2 Front Panel Interface Board W1312-60137 A1A2MP1 Speaker 9164-0453 A1A2MP2 Speaker Foam N9038-40088 A1W1 Flex Circuit, Front Panel Interface to LCD W1312-60122 A1W2 Cable Assembly, Wire Harness, Front Panel Interface to Backlight Power Supply W1312-60130 Keysight N9038A MXE Service Guide...
  • Page 504 Replaceable Parts Hardware Figure 17-26 Front Frame Exploded View - CCFL Backlight Keysight N9038A MXE Service Guide...
  • Page 505 A1A4 Display Backlight Power Supply 0950-4635 A1MP15 Shield, Inverter Board W1312-00024 A1MP16 Shield, Inverter Assembly, Top N9020-00010 A1A6 Input 2 LED Board N9038-63006 A1MP20 Bracket, Input 2 LED Board N9038-21202 a. Non-orderable item, see A1A1. Keysight N9038A MXE Service Guide...
  • Page 506 A1W2 Cable Assembly, Wire Harness, Front Panel Interface to Backlight Power Supply W1312-60113 A1MP16 Shield, Inverter Assembly, Top N9020-00010 Screw M3 X 0.5 (8 mm) 0515-0372 Screw M3 X 0.5 (8 mm) 0515-0372 A1A6 Input 2 LED Board N9038-63006 A1MP6 Grommet, A1W2 0400-0333 Keysight N9038A MXE Service Guide...
  • Page 507 A1MP10-13 Cable Clamp 1400-1439 A1W2 Cable Assembly, Wire Harness, Front Panel Interface to Backlight Power Supply W1312-60113 A1MP17 Shield, Inverter Assembly, Bottom N9020-00011 A1A4 Display Backlight Power Supply 0950-4635 Screw M3 X 0.5 (5 mm) 0515-1521 Keysight N9038A MXE Service Guide...

  • Page 508: 18 Assembly Replacement Procedures

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide 18 Assembly Replacement Procedures What You Will Find in This Chapter Procedures in this chapter enable you to locate, remove, and replace the following major assemblies in your instrument.
  • Page 509 Input Connector Assembly on page 618 Front Frame Assembly on page 622 Front Frame Assembly Components - LED on page 625 Front Frame Assembly Components - CCFL Backlight on page 633 Input 2 LED Board on page 642 Keysight N9038A MXE Service Guide...

  • Page 510: Before Starting

    The instrument contains potentially hazardous voltages. Refer to the safety symbols on the instrument and the general safety considerations at the beginning of this service guide before operating the unit with the cover removed. Failure to heed the safety precautions can result in severe or fatal injury. Keysight N9038A MXE Service Guide...

  • Page 511: Tools You Will Need

    Adjustments Tests after an instrument repair Refer to Chapter 19, “Post-Repair Procedures” for information about post-repair procedures. If one or more instrument assemblies have been repaired or replaced, perform the related adjustments and performance verification tests. Keysight N9038A MXE Service Guide...

  • Page 512: Major Assembly Locations

    A30 LISN Control Assembly A24 Conducted Filter Assembly A21 RF Preselector Input Assembly A22 Radiated Filter Assembly A14 LO Synthesizer Assembly A15 Front End Control Assembly A25 Wideband Analog IF Assembly A26 Wideband Digital IF Assembly Keysight N9038A MXE Service Guide...

  • Page 513: Instrument Outer Case

    4. Using the T-20 driver, remove the four screws (including washers) (3) that hold the rear feet (4) in place. 5. Pull the instrument cover (5) off towards the rear of the instrument. Keysight N9038A MXE Service Guide...

  • Page 514: Replacement

    4. Replace the bottom feet by sliding into place until they snap in. Install the locks by pressing in flat. 5. Replace the handle straps on both sides of the instrument. Torque the handle strap screws to 21 inch pounds. Keysight N9038A MXE Service Guide...

  • Page 515: Top Brace And Power Supply Bracket

    (5) (0515-0372) attaching the power supply bracket to the instrument and the three screws (6) (0515-1227) attaching the power supply bracket to the power supply. Figure 18-4 Top Brace and Power Supply Bracket Removal Keysight N9038A MXE Service Guide...

  • Page 516: Replacement

    18-4. To replace the top brace or the power supply bracket, place them into the correct position and attach the screws referred to in the removal process. Reinstall wire hold down 1. Torque to 9 inch-pounds. Keysight N9038A MXE Service Guide...

  • Page 517: Rf Area - Option 503, 508, & 526

    3. Remove the top brace. Refer to the Top Brace and Power Supply Bracket removal procedure. 4. Refer to Figure 18-7. Remove the Chassis Right Side Outer bracket (1) by removing the eleven screws (2) (0515-0372) using the T-10 driver. Keysight N9038A MXE Service Guide...

  • Page 518: Attenuators - Option 503, 508, & 526

    3. Remove the two screws (3) or (4) (0515-0372) for each attenuator bracket to remove from the chassis using the T-10 driver. 4. Remove the attenuator from the bracket by removing the two screws (0515-0372). Keysight N9038A MXE Service Guide...
  • Page 519 Assembly Replacement Procedures RF Area - Option 503, 508, & 526 Figure 18-8 Attenuators Removal - Option 503, 508, & 526 Item Keysight Part Number N9038-21302 N9038-21312 (Option C35) N9038-21303 N9020-20025 N9038-21314 N9038-21304 Keysight N9038A MXE Service Guide...
  • Page 520 Top Brace and Power Supply Bracket replacement procedure. 7. Replace the front panel. Refer to the Front Frame Assembly replacement procedure. 8. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 521: Rf Switch/High Band Preamp Assembly - Option 503, 508, & 526

    18-11. To separate the switch from the bracket, remove the four screws (3) (0515-0372) using the T-10 driver. Figure 18-9 RF Switch/High Band Preamp Assembly Cable Removal - Option 503, 508, & 526 Item Keysight Part Number N9038-21315 N9020-20101 N9020-20123 Keysight N9038A MXE Service Guide...
  • Page 522 Assembly Replacement Procedures RF Area - Option 503, 508, & 526 Figure 18-10 RF Switch/High Band Preamp Assembly Bracket Removal - Option 503, 508, & 526 Keysight N9038A MXE Service Guide...
  • Page 523 Assembly Replacement Procedures RF Area - Option 503, 508, & 526 Figure 18-11 RF Switch/High Band Preamp Assembly and Bracket Separation - Option 503, 508, & 526 Keysight N9038A MXE Service Guide...
  • Page 524 Top Brace and Power Supply Bracket replacement procedure. 7. Replace the front panel. Refer to the Front Frame Assembly replacement procedure. 8. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 525: Ytf Preselector - Option 503, 508, & 526

    (1) (0515-0372). The YTF Preselector can now be removed from the chassis (may require lifting up slightly on the RF Switch/High Band Preamp assembly). Figure 18-12 YTF Preselector Removal - Option 503, 508, & 526 Item Keysight Part Number N9038-21302 N9020-20123 N9020-20124 N9038-21304 Keysight N9038A MXE Service Guide...
  • Page 526 Assembly Replacement Procedures RF Area - Option 503, 508, & 526 Figure 18-13 YTF Preselector Screws - Option 503, 508, & 526 Keysight N9038A MXE Service Guide...
  • Page 527 Top Brace and Power Supply Bracket replacement procedure. 8. Replace the front panel. Refer to the Front Frame Assembly replacement procedure. 9. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 528: Cal Switch And Transfer Switch - Option 503, 508, & 526

    1. Refer to Figure 18-15. Remove rigid cables W28, W36, W37, and W43. Figure 18-15 W28, W36, W37, W43 Cable Removal - Option 503, 508, & 526 Item Keysight Part Number N9038-21303 N9038-21307 N9038-21315 N9038-21304 Keysight N9038A MXE Service Guide...
  • Page 529 RF Area - Option 503, 508, & 526 2. Refer to Figure 18-16. Remove cables W27, W30, and W31. Figure 18-16 W27, W30, and W31 Cables Removal - Option 503, 508, & 526 Item Keysight Part Number N9038-21301 N9038-21314 N9038-21305 Keysight N9038A MXE Service Guide...
  • Page 530 Switches/Bracket Removal - Option 503, 508, & 526 4. To separate the Cal Switch (1) from the bracket (5) (N9020-80057), remove the two screws (2) (0515-1410). To separate the Transfer Switch (3) from the bracket (5), remove the three screws (4) (0515-1940). Keysight N9038A MXE Service Guide...
  • Page 531 Assembly Replacement Procedures RF Area - Option 503, 508, & 526 Figure 18-18 Bracket Mount to Switch - Option 503, 508, & 526 Keysight N9038A MXE Service Guide...
  • Page 532 18-19. Place the switch/bracket assembly onto the chassis and use the three screws (1) to attach the bracket to the chassis. Torque the screws to 9 inch-lbs. Figure 18-19 Switches/Bracket Replacement - Option 503, 508, & 526 Keysight N9038A MXE Service Guide...
  • Page 533 RF Area - Option 503, 508, & 526 3. Refer to Figure 18-20. Replace cables W27, W30, and W31.Torque to 10 inch-lbs. Figure 18-20 W27, W30, and W31 Cables Replacement - Option 503, 508, & 526 Keysight N9038A MXE Service Guide...
  • Page 534 Top Brace and Power Supply Bracket replacement procedure. 7. Replace the front panel. Refer to the Front Frame Assembly replacement procedure. 8. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...
  • Page 535 18-23. The RF area consists of A9 Attenuator A, A10 Attenuator B, A11 RF Switch/High Band Preamp assembly, A12 YTF, SW1 Cal Switch, and SW2 Transfer Switch. Figure 18-22 RF Area Components and Cables - Option 544 Keysight N9038A MXE Service Guide...
  • Page 536 1. Remove the instrument outer case. Refer to the Instrument Outer Case removal procedure. 2. Remove the front panel. Refer to the Front Frame Assembly removal procedure. 3. Remove the top brace. Refer to the Top Brace and Power Supply Bracket removal procedure. Keysight N9038A MXE Service Guide...
  • Page 537 RF Area - Option 544 4. Refer to Figure 18-24. Remove the Chassis Right Side Outer bracket (1) by removing the eleven screws (2) (0515-0372) using the T-10 driver. Figure 18-24 Chassis Right Side Outer - Option 544 Keysight N9038A MXE Service Guide...

  • Page 538: Attenuators - Option 544

    3. To remove just the attenuator, remove the two screws (3) for each attenuator. The attenuator can now be removed from the instrument. 4. To remove the attenuator bracket, remove the four screws (4) (0515-0372). The attenuator bracket can now be removed from the chassis. Keysight N9038A MXE Service Guide...
  • Page 539 Assembly Replacement Procedures RF Area - Option 544 Figure 18-25 Attenuators Removal - Option 544 Item Keysight Part Number N9038-21331 N9038-21332 N9038-21337 N9038-21333 Keysight N9038A MXE Service Guide...
  • Page 540 Top Brace and Power Supply Bracket replacement procedure. 7. Replace the front panel. Refer to the Front Frame Assembly replacement procedure. 8. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 541: Rf Switch/High Band Preamp Assembly - Option 544

    18-28. To separate the switch from the bracket, remove the five screws (3) (0515-0372) using the T-10 driver. Figure 18-26 RF Switch/High Band Preamp Assembly Cable Removal - Option 544 Item Keysight Part Number N9038-21336 N9038-21339 N9010-20005 Keysight N9038A MXE Service Guide...
  • Page 542 Assembly Replacement Procedures RF Area - Option 544 Figure 18-27 RF Switch/High Band Preamp Assembly Bracket Removal - Option 544 Figure 18-28 RF Switch/High Band Preamp Assembly and Bracket Separation - Option 544 Keysight N9038A MXE Service Guide...
  • Page 543 Top Brace and Power Supply Bracket replacement procedure. 7. Replace the front panel. Refer to the Front Frame Assembly replacement procedure. 8. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 544: Ytf Preselector - Option 544

    (1) (0515-0372). The YTF Preselector can now be removed from the chassis (may require lifting up slightly on the RF Switch/High Band Preamp assembly). Figure 18-29 YTF Preselector Removal - Option 544 Item Keysight Part Number N9010-20005 N9038-21338 Keysight N9038A MXE Service Guide...
  • Page 545 Assembly Replacement Procedures RF Area - Option 544 Figure 18-30 YTF Preselector Screws Keysight N9038A MXE Service Guide...
  • Page 546 Top Brace and Power Supply Bracket replacement procedure. 8. Replace the front panel. Refer to the Front Frame Assembly replacement procedure. 9. Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 547: Cal Switch And Transfer Switch - Option 544

    18-32. Remove rigid cables W27, W28, W30, W31, W36, W37, W38, W39, and W43. Figure 18-32 Cal Switch and Transfer Switch Cables - Option 544 Item Keysight Part Number N9038-21301 N9038-21332 N9038-21333 N9038-21334 N9038-21335 N9038-21336 N9038-21339 N9010-20005 N9038-21304 Keysight N9038A MXE Service Guide...
  • Page 548 RF Area - Option 544 2. Refer to Figure 18-33. Remove the two screws (1) and remove the switch/bracket assembly from the chassis. Remove the ribbon cables from the switches. Figure 18-33 Switches/Bracket Removal - Option 544 Keysight N9038A MXE Service Guide...
  • Page 549 3. To separate the Cal Switch (1) from the bracket (5) (N9020-80057), remove the two screws (2) (0515-1410). To separate the Transfer Switch (3) from the bracket (5), remove the three screws (4) (0515-1940). Figure 18-34 Bracket Mount to Switch - Option 544 Keysight N9038A MXE Service Guide...
  • Page 550 Top Brace and Power Supply Bracket replacement procedure. 6. Replace the front panel. Refer to the Front Frame Assembly replacement procedure. 7. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 551: Rf Front End Assembly

    RF Front End Assembly, with the exception of A13W1 and A13W2. 5. Remove the W5 ribbon cable from A13J12. Figure 18-35 RF Front End Assembly Cable Removal - Option 503, 508, & 526 Keysight N9038A MXE Service Guide...
  • Page 552 Assembly Replacement Procedures RF Front End Assembly Figure 18-36 RF Front End Assembly Cable Removal - Option 544 6. Remove the 50 Ω terminators from RF Front End Assembly. Keysight N9038A MXE Service Guide...

  • Page 553: Replacement

    Front Frame Assembly replacement procedure. 5. Replace the instrument top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 6. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 554: Limiter Assembly

    W6, W26, and W27 attached to the Limiter Assembly. 5. Remove the four screws (1) (0515-0372) using the T-10 driver. The Limiter Assembly can now be removed from the chassis. Figure 18-38 Limiter Assembly Cable Removal Keysight N9038A MXE Service Guide...

  • Page 555: Replacement

    Front Frame Assembly replacement procedure. 4. Replace the instrument top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 5. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 556: Front End Control Assembly

    2. Remove the instrument top brace. Refer to the Top Brace and Power Supply Bracket removal procedure. 3. Refer to Figure 18-39. Locate the Front End Control assembly (1). Figure 18-39 Assembly Locations Keysight N9038A MXE Service Guide...

  • Page 557: Replacement

    3. Reattach the ribbon cables W3, W4, W5, and W12 to the Front End Control assembly. 4. Replace the instrument top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 5. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 558: Lo Synthesizer Assembly

    4. Remove the cables W41 and W44 from the LO Synthesizer assembly (2) using the 5/16 inch wrench. 5. Pull up on the LO Synthesizer assembly to unplug from the motherboard and lift out of the chassis. Figure 18-41 LO Synthesizer Assembly Removal Keysight N9038A MXE Service Guide...

  • Page 559: Replacement

    Torque to 10 inch-pounds. 3. Replace the instrument top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 4. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 560: Radiated Filter Assembly

    Radiated Filter, RF Preselector Input, and Conducted Filter Cables 5. The Radiated Filter assembly can now be unplugged from the motherboard by using the ejector on the Radiated Filter assembly to disconnect from the motherboard and lift out of the chassis. Keysight N9038A MXE Service Guide...

  • Page 561: Replacement

    18-42. Replace cable W34. Torque to 10 inch-pounds. 3. Replace the top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 4. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 562: Rf Preselector Input Assembly

    18-42. Replace cables W31, W32, W33, W34, and W36. Torque to 10 inch-pounds. 3. Replace the top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 4. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 563: Conducted Filter Assembly

    18-42. Replace cables W32 and W33. Torque to 10 inch-pounds. 3. Replace the top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 4. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 564: Lisn Control Assembly

    4. Remove cable W9 from the LISN Control assembly. 5. Using the board extractors, pull up on the LISN Control assembly to unplug from the motherboard and lift out of the chassis. Figure 18-43 LISN Control Assembly Removal Keysight N9038A MXE Service Guide...

  • Page 565: Replacement

    2. Reattach cable W9 to the LISN Control assembly. 3. Replace the top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 4. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 566: Wideband Analog If And Wideband Digital If Assemblies

    5. Remove ribbon cable W10. 6. The Wideband Analog IF and Wideband Digital IF assemblies can now be removed by pulling up on the ejectors to remove from the chassis. Figure 18-44 Option B85 Cables Keysight N9038A MXE Service Guide...

  • Page 567: Replacement

    4. Reattach ribbon cable W10. 5. Replace the top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 6. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 568: Reference Assembly

    5. Remove cables W18, W19, W20, W21, and W23 from the Reference assembly (6). Figure 18-45 Reference Board Cables 6. Remove the two screws (1). 7. Remove the Reference board by pulling up to disconnect from the motherboard and pull out of the chassis. Keysight N9038A MXE Service Guide...

  • Page 569: Replacement

    4. Replace cables W18, W19, W20, W21, and W23 to the correct locations. 5. Replace the top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 6. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 570: Midplane Board Assembly

    18-46. Remove the six screws (2) (0515-0375) attaching the midplane board assembly (1) to the midplane bracket. The midplane board assembly can now be pulled up from the chassis by use of the ejectors. Figure 18-46 Midplane Board Assembly Removal Keysight N9038A MXE Service Guide...

  • Page 571: Replacement

    4. Replace the processor assembly. Refer to the CPU Assembly replacement procedure. 5. Replace the top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 6. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 572: Rear Panel

    4. If present, remove W22 (3) from the rear panel using the 5/16” nut driver. 5. Using the T-10 driver, remove the sixteen screws (4) (0515-0372) attaching the rear panel (1) to the chassis. The rear panel can now be removed. Figure 18-47 Rear Panel Removal Keysight N9038A MXE Service Guide...

  • Page 573: Replacement

    4. Place the rear panel into position in the chassis. Replace the sixteen screws (0515-0372) to attach the rear panel to the chassis. Torque to 9 inch-pounds. 5. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 574: Power Supply Assembly

    18-48. Remove the three screws (1) (0515-1227) attaching the power supply to the chassis. 4. The power supply assembly can be removed from the chassis by pulling straight out the back. Figure 18-48 Power Supply Assembly Removal Keysight N9038A MXE Service Guide...

  • Page 575: Replacement

    Torque to 9 inch-pounds. 3. Replace the rear panel. Refer to the Rear Panel replacement procedure. 4. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 576: Cpu Assembly

    Secure the board with the ejectors. 2. Refer to Figure 18-49. Replace the six screws (1) (0515-0372) that attach the CPU assembly to the chassis. Torque to 9 inch-pounds. Keysight N9038A MXE Service Guide...

  • Page 577: Disk Drive

    If this data cannot be backed up because the instrument will not fully boot, go ahead and change the A5 Disk Drive and perform all adjustments listed in Chapter 19, “Post-Repair Procedures” for the A5 assembly. Keysight N9038A MXE Service Guide...
  • Page 578 Disk Drive 3. Refer to Figure 18-50. Locate and remove the existing disk drive carrier assembly (2) from the instrument by loosening the rear panel screw (1). Figure 18-50 Removing the Disk Drive Carrier Assembly Keysight N9038A MXE Service Guide...
  • Page 579 Assembly Replacement Procedures Disk Drive 4. Refer to Figure 18-51. Remove the 4 machine screws (1) (0515-0372) from the disk drive carrier assembly that secure the drive (2). Figure 18-51 Disk Drive Screws Keysight N9038A MXE Service Guide...
  • Page 580 18-50. Replace the disk drive carrier assembly (2) into the instrument and tighten the screw to 9 in-pounds. 8. Refer to Chapter 19, “Post-Repair Procedures” and perform all of the specified tasks for replacing the A5 Disk Drive assembly. Keysight N9038A MXE Service Guide...

  • Page 581: Disk Drive Interconnect

    3. Refer to Figure 18-52. Remove the A4 CPU assembly cover (1) by first removing the 19 flat-head screws (2) (0515-1227) and 3 pan-head screws (3) (0515-0372). Figure 18-52 A4A1 Disk Drive Interconnect Board Removal Keysight N9038A MXE Service Guide...
  • Page 582 (0515-0372). Torque all screws to 9 inch-pounds. 4. Re-install the A4 CPU assembly into the instrument. Refer to the CPU Assembly installation procedure. 5. Re-install the A5 Disk Drive assembly into the instrument. Refer to the Disk Drive installation procedure. Keysight N9038A MXE Service Guide...

  • Page 583: Aif/Dif Assembly

    18-53. Remove cable W15, W17, W20, and W23 from the bottom of the DIF assembly. Figure 18-53 DIF Cables 4. Refer to Figure 18-54. Pull the AIF/DIF assembly part way out of the chassis. Remove cables W16, W17, and W19 from the AIF assembly. Keysight N9038A MXE Service Guide...
  • Page 584 Assembly Replacement Procedures AIF/DIF Assembly Figure 18-54 AIF Cables 5. The AIF/DIF assembly can be removed from the chassis by pulling straight out the back. Keysight N9038A MXE Service Guide...

  • Page 585: Separate Aif/Dif Assembly

    1. To pair the AIF and DIF together again, set the DIF in position over the AIF. Reinstall the three screws (0515-0372) removed before. Torque to 9 inch-pounds, starting with the middle screw. 2. Reconnect the ribbon cable W7. Keysight N9038A MXE Service Guide...

  • Page 586: Replacement

    18-53. Replace cable W15, W17, W20, and W23 to the bottom of the DIF assembly. 4. Replace the rear panel. Refer to the Rear Panel replacement procedure. 5. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 587: Motherboard Assembly

    16.Remove the reference assembly. Refer to the Reference Assembly removal procedure. 17.Remove the Midplane assembly. Refer to the Midplane Board Assembly removal procedure. 18.Remove the Chassis Right Side Outer bracket. Refer to Figure 18-7 on page 537. Keysight N9038A MXE Service Guide...
  • Page 588 19.Remove the fan assembly. Refer to the Assemblyremoval procedure. 20.Refer to Figure 18-56 Figure 18-57. Remove the midplane bracket (1) by removing the eight screws (2) (0515-0372) (two on each side and four on the bottom). Figure 18-56 Midplane Bracket Removal Keysight N9038A MXE Service Guide...
  • Page 589 Assembly Replacement Procedures Motherboard Assembly Figure 18-57 Bottom Screws Keysight N9038A MXE Service Guide...
  • Page 590 Assembly Replacement Procedures Motherboard Assembly 21.Refer to Figure 18-58. Remove the left side chassis (1) (same side as the fan) by removing the nine screws (2) (0515-0372) (six on the bottom). Figure 18-58 Chassis Side Removal Keysight N9038A MXE Service Guide...

  • Page 591: Replacement

    (0515-0372). Torque to 9 inch-pounds. 3. Refer to Figure 18-56. Replace the midplane bracket (1) by replacing the eight screws (2) (0515-0372). Torque to 9 inch-pounds. 4. Replace the fan assembly. Refer to the Fan Assembly replacement procedure. Keysight N9038A MXE Service Guide...
  • Page 592 16.Replace the CPU assembly. Refer to the CPU Assembly replacement procedure. 17.Replace the power supply assembly. Refer to the Power Supply Assembly replacement procedure. 18.Replace the rear panel. Refer to the Rear Panel replacement procedure. Keysight N9038A MXE Service Guide...
  • Page 593 Front Frame Assembly replacement procedure. 22.Replace the top brace and reference bracket. Refer to the Top Brace and Power Supply Bracket replacement procedure. 23.Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 594: W35 Removal

    Figure 18-61. 2. Replace W35 by pressing into place until the retainers click into place. Figure 18-60 W35 Location Figure 18-61 W35 Removal Keysight N9038A MXE Service Guide...

  • Page 595: Fan Assembly

    3. Remove the Front Frame Assembly. Refer to the Front Frame Assembly removal procedure. 4. Refer to Figure 18-62. Remove the twelve remaining screws (1) (0515-0372) that attach the fan assembly to the chassis. Figure 18-62 Fan Assembly Removal Keysight N9038A MXE Service Guide...
  • Page 596 Assembly Replacement Procedures Fan Assembly 5. Refer to Figure 18-63. Unplug the fan wires from the motherboard. The fan assembly can now be lifted from the chassis. Figure 18-63 Fan Wires Keysight N9038A MXE Service Guide...
  • Page 597 4. With the rivets center posts raised, snap the rivets into place through the fan grill and fan bracket and into the fan. Screw the center posts into place. This may require a small hammer or push tool to push the rivets in. Keysight N9038A MXE Service Guide...

  • Page 598: Replacement

    Front Frame Assembly replacement procedure. 4. Replace the top brace. Refer to the Top Brace and Power Supply Bracket replacement procedure. 5. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 599: Input Connector Assembly

    Input Connector Assembly. Figure 18-65 RF 1 Input Connector Assembly Removal 4. Remove the two screws (1) (0515-0372) that attach the Input Connector Assembly to the chassis. The connector assembly can now be lifted from the chassis. Keysight N9038A MXE Service Guide...
  • Page 600 2. Reconnect the semi-rigid cable W25 to the Input Connector Assembly. Torque to 10 inch-pounds. 3. Replace the Front Frame Assembly. Refer to the Front Frame Assembly replacement procedure. 4. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 601: Rf Input 2 Connector

    Input Connector Assembly. Figure 18-66 RF 2 Input Connector Assembly Removal 4. Remove the two screws (1) (0515-0372) that attach the Input Connector Assembly to the chassis. The connector assembly can now be lifted from the chassis. Keysight N9038A MXE Service Guide...
  • Page 602 2. Reconnect the semi-rigid cable W25 to the Input Connector Assembly. Torque to 10 inch-pounds. 3. Replace the Front Frame Assembly. Refer to the Front Frame Assembly replacement procedure. 4. Replace the instrument outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 603: Front Frame Assembly

    Remove the ribbon cable W8 from the motherboard. The cable has locking tabs on each side, pinch and pull to release. 5. Refer to Figure 18-68. Remove W6 from the A23 Limiter Assembly. Figure 18-67 Front Frame Assembly Removal Keysight N9038A MXE Service Guide...
  • Page 604 Assembly Replacement Procedures Front Frame Assembly Figure 18-68 Front Panel Cable Keysight N9038A MXE Service Guide...

  • Page 605: Replacement

    Be sure to hold the connector on the end of W45 still when tightening this connection. Only rotate the connector on W46 to tighten. Doing otherwise will damage W45. Figure 18-69 EXM Cables 5. Replace the outer case. Refer to the Instrument Outer Case replacement procedure. Keysight N9038A MXE Service Guide...

  • Page 606: Front Frame Assembly Components - Led

    Access to any of the Front Frame assemblies requires removal of the Front Frame Assembly from the chassis. Figure 18-70 Front Frame Parts - LED Item Description A1MP14 Display Bracket A1A5 Front Panel Daughter Board A1MP19 Shield, Front Panel Interface A1A6 Input 2 LED Board Keysight N9038A MXE Service Guide...
  • Page 607 Front Frame Parts (shields off) - LED Item Description A1A2 Front Panel Interface Board A1A2MP1 Speaker A1A2MP2 Speaker Foam A1W1 Flex Circuit, Front Panel Interface to LCD A1W2 Cable Assembly, Wire Harness, Backlight Power Supply to LCD Keysight N9038A MXE Service Guide...
  • Page 608 Assembly Replacement Procedures Front Frame Assembly Figure 18-72 Front Frame Exploded View - LED Keysight N9038A MXE Service Guide...
  • Page 609 Nameplate Label, 8.4 GHz or 26.5 GHz A1MP8 LCD Lens Gasket A1MP7 LCD Glass Filter A1A4 Display Backlight Power Supply A1MP19 Shield, Front Panel Interface A1MP14 Display Bracket A1A6 Input 2 LED Board A1MP20 Bracket, Input 2 LED Board Keysight N9038A MXE Service Guide...
  • Page 610 Assembly Replacement Procedures Front Frame Assembly Figure 18-73 Front Frame Assembly Shields - LED Item Description A1MP19 Shield, Front Panel Interface Screw M3 X 0.5 (5 mm) (0515-0372) Keysight N9038A MXE Service Guide...
  • Page 611 (1), remove the four screws (3) (0515-0367). When reassembling, torque the four screws to 5 inch-pounds. 5. To separate the DC to DC Converter (4) from the display bracket (1), remove the two screws (5). When reassembling, torque the two screws to 9 inch-pounds. Keysight N9038A MXE Service Guide...
  • Page 612 Frame Assembly. Reconnect the flex circuit A1W1 (1) and A1W3 (2) to the front panel interface board (4). 2. Replace the screw (3) (0515-0372) that secures the display bracket to the Front Frame Assembly. Torque to 9 inch pounds. 3. Replace the front panel shield. Keysight N9038A MXE Service Guide...
  • Page 613 (30) (0515-0372). Torque to 9 inch-pounds. 4. Replace the display. Refer to the Display Assembly - LED replacement procedure. 5. Replace the RPG knob by firmly pressing it on. Keysight N9038A MXE Service Guide...

  • Page 614: Front Frame Assembly Components - Ccfl Backlight

    A1W2 Cable Assembly, Wire Harness, Front Panel Interface to Backlight Power Supply A1MP16 Shield, Inverter Assembly, Top Screw M3 X 0.5 (8 mm) (0515-0372) Screw M3 X 0.5 (8 mm) (0515-0372) A1A6 Input 2 LED Board A1MP6 Grommet, A1W2 Keysight N9038A MXE Service Guide...
  • Page 615 A1W2 Cable Assembly, Wire Harness, Front Panel Interface to Backlight Power Supply A1MP17 Shield, Inverter Assembly, Bottom A1A4 Display Backlight Power Supply Screw M3 X 0.5 (5 mm) (0515-1521) Screw M3 X 0.5 (8 mm) (0515-0372) Keysight N9038A MXE Service Guide...
  • Page 616 Assembly Replacement Procedures Front Frame Assembly Figure 18-78 Front Frame Exploded View - CCFL Backlight Keysight N9038A MXE Service Guide...
  • Page 617 A1W2 Cable Assembly, Wire Harness, Front Panel Interface to Backlight Power Supply A1MP17 Shield, Inverter Assembly, Bottom A1A4 Display Backlight Power Supply A1MP15 Shield, Inverter Board A1MP16 Shield, Inverter Assembly, Top A1A6 Input 2 LED Board A1MP20 Input 2 LED Board Bracket Keysight N9038A MXE Service Guide...
  • Page 618 Assembly Replacement Procedures Front Frame Assembly Figure 18-79 Front Frame Assembly Shields - CCFL Backlight Item Description Screw M3 X 0.5 (5 mm) (0515-0372) Screw M3 X 0.5 (8 mm) (0515-0372) Keysight N9038A MXE Service Guide...
  • Page 619 Replace the two screws (0515-0372). Torque to 9 inch pounds. 2. Reattach the wires to their correct locations. 3. Place the inverter top shield into position. Replace the eight screws (32) (0515-0372) as shown in Figure 18-79. Torque to 9 inch pounds. Keysight N9038A MXE Service Guide...
  • Page 620 6. Refer to Figure 18-82. To separate the LCD (1) from the display bracket (2), remove the four screws (3) (0515-0367). When reassembling, torque the four screws to 5 inch-pounds. Keysight N9038A MXE Service Guide...
  • Page 621 Frame Assembly. Reconnect the flex circuit A1W1 (2) to the front panel interface board (4). 2. Replace the two screws (2) (0515-0372) that secure the display bracket to the Front Frame Assembly. Torque to 9 inch pounds. 3. Replace the Inverter board. Keysight N9038A MXE Service Guide...
  • Page 622 (32) (0515-0372). Torque to 9 inch pounds. 4. Replace the display. Refer to the Display Assembly - CCFL Backlight replacement procedure. 5. Replace the RPG knob by firmly pressing it on. Keysight N9038A MXE Service Guide...

  • Page 623: Input 2 Led Board

    18-83. Place the LED board bracket (4) into position in the Front Frame Assembly. Secure it with the single screw (3), Torque to 9 inch-pounds. 2. Place the LED board (2) onto the bracket and secure with two screws (1) (0515-0372). Torque to 3 inch-pounds. Keysight N9038A MXE Service Guide...

  • Page 624: Post-Repair Procedures

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide Post-Repair Procedures What You Will Find in This Chapter This chapter provides information that will enable you to return an instrument to full operation following the replacement of any instrument assembly. This information includes a table that shows which adjustments and/or performance tests must be executed after replacing an assembly.
  • Page 625 Restore” on page 647. “Calibration Data Backup and Restore” on page 647 “BIOS Settings Verification” on page 651 “Operating System Initialization” on page 652 “FPGA Synchronization” on page 655 “Programming Model and Serial Numbers” on page 657 Keysight N9038A MXE Service Guide...
  • Page 626 Conducted Band VSWR Radiated Band VSWR Calibration Software required for all performance tests, adjustments and utilities. For details see http://www.keysight.com/find/calibrationsoftware See the "Additional Tasks" section in this chapter for detailed instructions on these tasks To set the instrument time and date select Start, Control Panel, Date Time Language and Regional Options, Date and Time Before replacing the A5 Disk Drive, see the “Calibration Data Backup and Restore”...
  • Page 627 Post-Repair Procedures Post-Repair Procedures Keysight N9038A MXE Service Guide...

  • Page 628: Calibration Data Backup And Restore

    2. Connect a USB FLASH drive to one of the front panel USB port. 3. Press System, Alignments, Backup or Restore Align Data. 4. The Alignment Data Wizard window as shown in Figure 19-1 will appear. Keysight N9038A MXE Service Guide...
  • Page 629 Post-Repair Procedures Post-Repair Procedures Figure 19-1 Alignment Data Wizard 5. Follow the on-screen instruction to backup the calibration data to the USB FLASH drive. Keysight N9038A MXE Service Guide...
  • Page 630 3. Using the mouse go to Start, Computer, and navigate to the following folder: C:\Program Files\Agilent\SignalAnalysis\Infrastructure 4. Double-click on BackupRestoreAlignDataWizard and the window shown in Figure 19-1 will appear. 5. Follow the on-screen instructions to backup the calibration data to the USB FLASH drive. Keysight N9038A MXE Service Guide...
  • Page 631 3. Restore the instrument calibration data by pressing: System, Alignments, Backup or Restore Align Data... The Alignment Data Wizard window as shown in Figure 19-1 will appear. 4. Follow the on-screen instruction to restore the previously saved calibration data from the USB FLASH drive. Keysight N9038A MXE Service Guide...
  • Page 632 1. Connect an external USB keyboard to one of the front panel USB ports. 2. Turn on instrument power. 3. Confirm Keysight Technologies splash screen comes up within a few seconds. 4. Press the key on the keyboard specified on the initial boot screen to enter the setup utility.
  • Page 633 Initialization 1. With the new disk drive installed power the instrument on. 2. Within a few seconds you will see the initial Keysight Technologies splash screen, and then the boot selection menu as seen in Figure 19-2.
  • Page 634 Once this process has completed the Anti-Virus Message will appear, as shown in Figure 19-4. At this point the operating system initialization process will be completed and either selection can be made, or the instrument can be powered off. Keysight N9038A MXE Service Guide...
  • Page 635 Post-Repair Procedures Post-Repair Procedures Figure 19-4 Anti-Virus Message 7. The disk drive in use is now ready for further configuration. Keysight N9038A MXE Service Guide...
  • Page 636 3. Using the mouse go to Start, Computer and navigate to the following folder: C:\Program Files\Agilent\SignalAnalysis\Physics 4. In this folder find and execute the file named: FPGA_Prog.bat 5. The FPGA Programming Utility will start and a window as shown in Figure 19-5 will appear. Keysight N9038A MXE Service Guide...
  • Page 637 7. The programming of the FPGA code could take a few minutes to complete. Once it has finished the instrument will reboot itself to use the new code and this process will then be completed. Keysight N9038A MXE Service Guide...
  • Page 638 A7 Midplane board assembly replacement. To program the model and serial numbers into a replacement A7 Midplane board assembly the N7818A Keysight MXE EMI Receiver Calibration Application Software will be required. Information regarding N7818A Keysight MXE EMI Receiver Calibration Application Software can be found at: http://www.keysight.com/find/calibrationsoftware...
  • Page 639 Post-Repair Procedures Post-Repair Procedures Keysight N9038A MXE Service Guide...

  • Page 640: 20 Instrument Software

    Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide 20 Instrument Software What You Will Find in This Chapter Instrument Software Overview on page 660 Software Licensing on page 660 Software Updates on page 661 Instrument Measurement Application Software on page 661...

  • Page 641: Instrument Software Overview

    One of the benefits of this is that you cannot have revisions that are incompatible with each other installed in an instrument. Software Licensing All application software needs to have a valid license in order to be available for use. This also includes the spectrum analyzer application (N9060B). Keysight N9038A MXE Service Guide...

  • Page 642: Software Updates

    Software Updates Software Updates Instrument Measurement Application Software Updates are installed much like most other types of commercial software packages. The latest revision of the software, along with complete installation instructions, can be downloaded from: www.keysight.com/find/mxe_software Keysight N9038A MXE Service Guide...
  • Page 643 Instrument Software Software Updates Keysight N9038A MXE Service Guide...

  • Page 644: 21 Performance Verification And Adjustment Software

    21 Performance Verification and Adjustment Software Test Software Overview The N9038A MXE EMI Receiver can be fully tested and adjusted with the use of the N7818A MXE EMI Receiver Calibration Application software. To download a copy of the Performance Verification & Adjustment software as well as find information on software licensing, visit the Keysight Calibration &...

  • Page 645: Required Test Equipment

    Performance Verification and Adjustment Software Test Software Overview Required Test Equipment A complete list of test equipment required to perform both the performance verification testing as well as all adjustments can be found at: http://cal.software.keysight.com/ Keysight N9038A MXE Service Guide...
  • Page 646 Keysight Technologies X-Series Signal Analyzers N9038A MXE Signal Analyzer Service Guide Tests What You Will Find in This Chapter The following information is found in this chapter: Functional Test Versus Performance Verification on page 666 Before Performing a Functional Test on page 667...

  • Page 647: Tests

    Performance verification tests span a wide range of instrument parameters and provide the highest level of confidence that the instrument conforms to published specifications. These tests can be time consuming and require extensive test equipment. Keysight N9038A MXE Service Guide...

  • Page 648: Before Performing A Functional Test

    System, Alignments, More, RF Preselector, Align Now, 20 Hz to 3.6 GHz. Functional test accuracy depends on the precision of the test equipment used. Ensure that all of the test equipment is calibrated before running a functional test. Keysight N9038A MXE Service Guide...

  • Page 649: Test Equipment

    Attenuator, 30 dB Accuracy: < 0.5 dB @ 50 MHz 11708A Type-N (m) to Type-N (f) Attenuator, 30 dB Accuracy: < 0.5 dB @ 50 MHz 8493C 3.5 mm (m) to 3.5 mm (f)) Option 030 Keysight N9038A MXE Service Guide...
  • Page 650 BNC (m) to BNC (f) Rejection at 65 MHz: > 40 dB Rejection at 75 MHz: > 60 dB Power Splitter Frequency Range: 50 MHz to 26.5 GHz 11667B 3.5 mm (f) Tracking Between Ports: < 0.25 dB Keysight N9038A MXE Service Guide...
  • Page 651 2.4 mm (f) a. Quantity of 2 required for Option C35 (3.5 mm RF Input 1) b. Required for Option 544 (44 GHz Frequency Range) c. Only required for Option C35 (3.5 mm RF Input 1) Keysight N9038A MXE Service Guide...

  • Page 652: Displayed Average Noise Level (Danl)

    Frequency: DC to 50 GHz 85138B Termination, 50 Ω 2.4 mm (f) a. Only required for Option C35 (3.5 mm RF Input 1) b. Only required for Option 544 (44 GHz Frequency Range) Figure 22-1 DANL Test Setup Keysight N9038A MXE Service Guide...

  • Page 653: Procedure

    10 kHz span. Ignore the residual response if one appears when taking the measurement. g. Enter the value of the display line as the Measured Average Noise Level in Table 22-3. Keysight N9038A MXE Service Guide...
  • Page 654 6. Attach a 50 Ω termination to RF Input 2. 7. Select RF Input 2 on the receiver by pressing Input/Output, RF Input, RF Input Port, RF Input 2. 8. Tune the receiver to 10 MHz by pressing Freq Channel, Center Freq, 10 MHz. Keysight N9038A MXE Service Guide...
  • Page 655 Displayed Average Noise Level (DANL) Results - RF Input 2 Measured Average Noise Level Normalized Average Noise Level Test Limits Center Frequency (dBm) /(1 Hz BW) (dBm) (dBm) 10 MHz –139 100 MHz –140 500 MHz –142 1 GHz –140 Keysight N9038A MXE Service Guide...

  • Page 656: Frequency Readout Accuracy

    Frequency: 10 MHz to 1.51 GHz 11901B Adapter VSWR: < 1.4:1 2.4 mm (f) to 3.5 mm (f) a. Quantity of 2 required for Option C35 (3.5 mm RF Input 1) b. Required for Option 544 (44 GHz Frequency Range) Keysight N9038A MXE Service Guide...

  • Page 657: Procedure

    6. Set up the receiver by pressing: Mode Setup, EMC Standard, None Input/Output, More, Freq Ref In, External FREQ Channel, Center Freq, 1505, MHz SPAN X Scale, Span, 2990, MHz Trace/Detector, More, Detector, Sample Single Keysight N9038A MXE Service Guide...
  • Page 658 127.2 1504.56 MHz 1505.44 MHz 1505 54.1 1504.8122 MHz 1505.1878 MHz 1505 7.95 1504.97240 MHz 1505.0276 MHz 1505 0.106 1504.999630 MHz 1505.000370 MHz 517.59 1.98 517.58316 MHz 517.59684 MHz 832.50 1.98 832.49316 MHz 832.50684 MHz Keysight N9038A MXE Service Guide...

  • Page 659: Second Harmonic Distortion (Shd)

    Rejection at 75 MHz: > 60 dB Signal Generator Frequency: 50 MHz Spectral Purity: Better than –30 dBc a. Quantity 2 required for Option C35 (3.5 mm RF Input 1) or Option 544 (44 GHz Frequency Range) Keysight N9038A MXE Service Guide...

  • Page 660: Procedure

    Mode Setup, EMC Standard, None Input/Output, More, Freq Ref In, External FREQ Channel, Center Freq, 40, MHz SPAN X Scale, Span, 1, MHz AMPTD Y Scale, Attenuation, Mech Atten, 10, dB 6. On the receiver, press Peak Search. Keysight N9038A MXE Service Guide...
  • Page 661 10.Press Peak Search. Enter the displayed value under the Measured Second Harmonic Distortion (dBc) heading in Table 22-9. Table 22-9 Second Harmonic Distortion Results Applied Frequency Mixer Level Measured Second Harmonic Distortion Specification (MHz) (dBm) (dBc) (dBc) –15 –55 Keysight N9038A MXE Service Guide...

  • Page 662: Amplitude Accuracy At 50 Mhz

    Power Splitter Frequency Range: 50 MHz to 26.5 GHz 11667B 3.5 mm (f) Tracking between ports: < 0.25 dB Signal Generator Typical Temperature Stability: 0.01 dBc/°C a. Required for Option 544 (44 GHz Frequency Range) Keysight N9038A MXE Service Guide...

  • Page 663: Procedure

    Power Level, −4, dBm RF On 5. Select RF Input 1 on the receiver by pressing Input/Output, RF Input, RF Input Port, RF Input. 6. Preset the receiver by pressing Mode, Spectrum Analyzer, Mode Preset. Keysight N9038A MXE Service Guide...
  • Page 664 Measured Power Meter Amplitude Test Limit Source (dB) Amplitude Amplitude Accuracy (dB) Amplitude (dBm) (dBm) Error (dBm) Meas_Amp Power_Meter (dB) −4 2 MHz ±1.13 dB 1 MHz ±1.13 dB −9 −14 500 kHz ±1.13 dB Keysight N9038A MXE Service Guide...
  • Page 665 Test Limit Source (dB) Amplitude Amplitude Accuracy (dB) Amplitude (dBm) (dBm) Error (dBm) Meas_Amp Power_Meter (dB) 100 kHz ±1.13 dB −4 100 kHz ±1.13 dB −14 −4 100 kHz ±1.13 dB 100 kHz ±1.13 dB −14 Keysight N9038A MXE Service Guide...
  • Page 666 −4 2 MHz ±1.16 dB 1 MHz ±1.16 dB −9 −14 500 kHz ±1.16 dB 100 kHz ±1.16 dB −4 −14 100 kHz ±1.16 dB 100 kHz ±1.16 dB −4 −14 100 kHz ±1.16 dB Keysight N9038A MXE Service Guide...

  • Page 667: Amplitude Accuracy - Preamp On

    Signal Generator Typical Temperature Stability: 0.01 dBc/°C a. Only required for Option 544 (44 GHz Frequency Range) b. Only required for Option C35 (3.5 mm RF Input 1) or Option 544 (44 GHz Frequency Range) Keysight N9038A MXE Service Guide...

  • Page 668: Procedure

    4. On the signal generator, press PRESET, then set the controls as follows: FREQUENCY, 50, MHz Power Level, −13, dBm RF On 5. Select RF Input 1 on the receiver by pressing Input/Output, RF Input, RF Input Port, RF Input. Keysight N9038A MXE Service Guide...
  • Page 669 22-14: Table 22-14 Amplitude Accuracy Results (RF Input 1 - Preamp Off) Nominal Measured Power Meter Amplitude Test Limit Source Amplitude Amplitude Accuracy (dB) Amplitude (dBm) (dBm) Error (dBm) Meas_Amp Power_Meter (dB) ±1.30 dB −13 Keysight N9038A MXE Service Guide...
  • Page 670 Amplitude Accuracy Error = Meas_Amp + 30 dB − Power_Meter Table 22-15 Amplitude Accuracy Results (RF Input 2 - Preamp Off) Nominal Measured Power Meter Amplitude Test Limit Source Amplitude Amplitude Accuracy (dB) Amplitude (dBm) (dBm) Error (dBm) Meas_amp Power_meter (dB) ±1.33 dB −13 Keysight N9038A MXE Service Guide...

  • Page 671: Frequency Response (Flatness)

    Tracking between ports: < 0.4 dB 2.4 mm (f) Signal Generator Frequency Range: 50 MHz to 26 GHz a. Required for Option 503, 508, and 526 b. Required for Option 544 (44 GHz Frequency Range) Keysight N9038A MXE Service Guide...

  • Page 672: Procedure

    Power level, –4, dBm RF, On RF Input 1 5. Select RF Input 1 on the receiver by pressing Input/Output, RF Input, RF Input Port, RF Input. 6. Preset the receiver by pressing Mode, Spectrum Analyzer, Mode Preset. Keysight N9038A MXE Service Guide...
  • Page 673 Calculate the frequency response error normalized to 50 MHz using the following equation, and record the results under the Flatness Normalized the 50 MHz column in Table 22-17: Normalized to 50 MHz = Meas_Error − Meas_Error @ 50 MHz Keysight N9038A MXE Service Guide...
  • Page 674 20 GHz ±3.0 dB 23 GHz ±3.0 dB 26 GHz ±3.0 dB 29 GHz ±3.5 dB 32 GHz ±3.5 dB 35 GHz ±4.5 dB 38 GHz ±4.5 dB 41 GHz ±4.5 dB 44 GHz ±4.5 dB Keysight N9038A MXE Service Guide...
  • Page 675 Calculate the frequency response error normalized to 50 MHz using the following equation, and record the results under the Normalized to 50 MHz column in Table 22-18: Normalized to 50 MHz = Meas_Error − Meas_Error @ 50 MHz Keysight N9038A MXE Service Guide...
  • Page 676 Measurement Normalized Normalized Center Amplitude Amplitude Error to 50 MHz Test Limit Frequency (dBm) (dBm) (dB) (dB) (dB) Meas_Amp Power_Meter Meas_Error 50 MHz 300 MHz ±1.75 dB 600 MHz ±1.75 dB 1.0 GHz ±1.75 dB Keysight N9038A MXE Service Guide...

  • Page 677: Frequency Response (Flatness) - Preamp On

    Frequency Range: 50 MHz to 44 GHz 11667C Power Splitter Tracking between ports: < 0.4 dB 2.4 mm (f) Signal Generator Frequency Range: 50 MHz to maximum frequency of a. Required for Option 503, 508, and 526 Keysight N9038A MXE Service Guide...

  • Page 678: Procedure

    4. On the signal generator, press PRESET, then set the controls as follows: FREQUENCY, 50, MHz Power level, –54, dBm RF, On RF Input 1 5. Select RF Input 1 on the receiver by pressing Input/Output, RF Input, RF Input Port, RF Input. Keysight N9038A MXE Service Guide...
  • Page 679 Enter the receiver marker amplitude value into the Receiver Amplitude column of Table 22-20. i. Calculate the measurement error using the following equation, and record the results under the Measurement Error column in Table 22-20: Measurement Error = Meas_Amp − Power_Meter Keysight N9038A MXE Service Guide...
  • Page 680 20 GHz ±3.5 dB 23 GHz ±3.5 dB 26 GHz ±3.5 dB 29 GHz ±4.0 dB 32 GHz ±4.0 dB 35 GHz ±4.0 dB 38 GHz ±5.5 dB 41 GHz ±5.5 dB 44 GHz ±5.5 dB Keysight N9038A MXE Service Guide...
  • Page 681 Calculate the frequency response error normalized to 50 MHz using the following equation, and record the results under the Normalized to 50 MHz column in Table 22-21: Normalized to 50 MHz = Meas_Error − Meas_Error @ 50 MHz Keysight N9038A MXE Service Guide...
  • Page 682 Measurement Normalized Normalized Center Amplitude Amplitude Error to 50 MHz Test Limit Frequency (dBm) (dBm) (dB) (dB) (dB) Meas_Amp Power_Meter Meas_Error 50 MHz 300 MHz ±2.0 dB 600 MHz ±2.0 dB 1.0 GHz ±2.0 dB Keysight N9038A MXE Service Guide...

  • Page 683: Scale Fidelity

    Required for Option CNF (Type-N RF Input 1) b. Quantity of 2 required for Option C35 (3.5 mm RF Input 1) c. Required for Option 544 (44 GHz Frequency Range) d. Quantity of 2 required Keysight N9038A MXE Service Guide...

  • Page 684: Procedure

    Mode Setup, EMC Standard, None Input/Output, More, Freq Ref In, External FREQ Channel, Center Freq, 50, MHz SPAN X Scale, Span, 1, MHz AMPTD Y Scale, Ref Level, 0, dBm Meas Setup, Average/Hold Number, 10, Enter Keysight N9038A MXE Service Guide...
  • Page 685 Record the delta marker amplitude value into the Marker Delta Value column of Table 22-23. Table 22-23 Scale Fidelity Results External Attenuator Setting Minimum Marker Delta Value Maximum (dB) (dB) (dB) (dB) Reference −11.0 −9.0 −21.0 −19.0 −31.0 −29.0 −41.0 −39.0 −51.0 −49.0 Keysight N9038A MXE Service Guide...

  • Page 686: Cispr Resolution Bandwidth Shape Accuracy

    BNC (m) to BNC (m) Signal Generator Frequency: 10 MHz to 1.51 GHz a. Quantity of 2 required for Option C35 (3.5 mm RF Input 1) b. Required for Option 544 (44 GHz Frequency Range) Keysight N9038A MXE Service Guide...

  • Page 687: Procedure

    Sweep/Control, Sweep Setup, Swp Time Rules, SA-Accuracy 6. Perform the following steps for each Resolution Bandwidth listed in Table 22-25: a. Set the signal generator frequency to the value listed in the Center Frequency column in Table 22-25. Keysight N9038A MXE Service Guide...
  • Page 688 N dB Points value in Table 22-25 for the Resolution Bandwidth being measured. i. Turn off the N dB Points function by pressing Marker, Off. j. Turn off trace averaging by pressing Trace/Detector, Clear Write. Keysight N9038A MXE Service Guide...
  • Page 689 -20 dB 100 kHz 280 kHz 1.0 MHz 1.2 GHz 2.70 MHz -3.0 dB 500 kHz 1.1 MHz -6.0 dB 750 kHz 1.1 MHz -9.0 dB 900 kHz 2 MHz -20.0 dB 900 kHz 2.7 MHz Keysight N9038A MXE Service Guide...

  • Page 690: Quasi-Peak Detector Accuracy

    Amplitude Range: −60 to 0 dBm a. Quantity of 2 required for Option CNF (Type-N RF Input) b. Only required for Option C35 (3.5 mm RF Input 1) c. Required for Option 544 (44 GHz Frequency Range) Keysight N9038A MXE Service Guide...

  • Page 691: Sine Wave Generator Characterization

    5. Set the IGUU 2916 EMI pulse generator to output a 10 MHz Sine Wave signal. 6. After allowing the power meter to settle, record the reading in Table 22-30 under the Power Meter column. Keysight N9038A MXE Service Guide...

  • Page 692: Initial Setup

    10.Turn on the marker by pressing Marker. 11.Record the marker value in Table 22-27 as the Measured value for Band A. 12.Calculate the Error with the following formula and enter the value in Table 22-27 Keysight N9038A MXE Service Guide...
  • Page 693 21.Put the marker in Delta mode by pressing Marker, Delta. 22.Turn on the continuous peak function by pressing Peak Search, More, Continuous Peak Search On. 23.Change the Pulse Frequency on the IGUU 2916 EMI pulse generator to 100 Hz. Keysight N9038A MXE Service Guide...

  • Page 694: Band B Testing

    5. Set the Sweeptime to 2 seconds by pressing Sweep / Control, 2 s. 6. Set the RF Coupling to DC by pressing Input / Output, RF Input, RF Coupling DC (instruments with Option 544 are always DC coupled so this step is skipped for them.) Keysight N9038A MXE Service Guide...
  • Page 695 18.Once the sweep has completed find the peak of the detector output by pressing Peak Search. 19.Record the marker value in Table 22-31 as the Measured value for the Band B reference PRF. 20.Calculate the Error with the following formula and enter the value in Table 22-31. Keysight N9038A MXE Service Guide...
  • Page 696 (dB) 1000 Reference −8.0 −5.0 −12.0 −8.0 −23.0 −18.0 −25.0 −20.0 −26.0 −21.0 Isolated (0.1 Hz) a. Due to the slow pulse rate you may need to take multiple sweeps to capture a complete pulse. Keysight N9038A MXE Service Guide...

  • Page 697: Band C Testing

    9. Turn on the marker by pressing Marker. 10.Record the marker value in Table 22-33 as the Measured value for Band C. 11.Calculate the Error with the following formula and enter the value in Table 22-33 Keysight N9038A MXE Service Guide...
  • Page 698 20.Put the marker in Delta mode by pressing Marker, Delta. 21.Turn on the continuous peak function by pressing Peak Search, More, Continuous Peak Search On. 22.Change the Pulse Frequency on the IGUU 2916 EMI pulse generator to 20 Keysight N9038A MXE Service Guide...
  • Page 699 (dB) 1000 Reference −10.5 −7.5 −16.0 −12.0 −28.5 −23.5 −31.0 −26.0 −34.0 −29.0 Isolated (0.1 Hz) a. Due to the slow pulse rate you may need to take multiple sweeps to capture a complete pulse. Keysight N9038A MXE Service Guide...

  • Page 700: Band D Testing

    Pulse Frequency: 100 Hz c. Amplitude: 60 dBμV 2. Connect the IGUU 2916 EMI pulse generator Output Main Generator Band C/D to the EMI receiver RF Input. 3. Preset the EMI receiver by pressing Mode Preset. Keysight N9038A MXE Service Guide...
  • Page 701 17.Take a single sweep on the EMI receiver by pressing Restart. 18.Once the sweep on the EMI receiver has completed and the auto peak value is found record the marker delta amplitude value for the pulse frequency being measured in Table 22-37. Keysight N9038A MXE Service Guide...
  • Page 702 25.Setup the IGUU 2916 EMI pulse generator as follows: a. Aux. Generator: Band C/D b. Pulse Frequency: 100 Hz c. Amplitude: 40 dBμV 26.Move the cable on the IGUU 2916 EMI pulse generator to Output Auxiliary Generator Band A/B/C/D. Keysight N9038A MXE Service Guide...
  • Page 703 31.Take a single sweep on the EMI receiver by pressing Restart. 32.Once the sweep on the EMI receiver has completed and the auto peak value is found record the marker delta amplitude value for the pulse frequency of 1000 Hz in Table 22-37. Keysight N9038A MXE Service Guide...

  • Page 704: Peak Detector Accuracy

    Amplitude Range: -60 to 0 dBm a. Quantity 2 required for Option CNF (Type-N RF Input) b. Only required for Option C35 (3.5 mm RF Input) c. Only required for Option 544 (44.0 GHz Frequency Range) Keysight N9038A MXE Service Guide...

  • Page 705: Sine Wave Generator Characterization

    6. After allowing the power meter to settle, record the reading in Table 22-41 under the Power Meter column. 7. Set the IGUU 2916 EMI pulse generator to output a 100 MHz Sine Wave signal. Keysight N9038A MXE Service Guide...

  • Page 706: Initial Setup

    10.Turn on the marker by pressing Marker. 11.Record the marker value in Table 22-39 as the Measured value for Band A. 12.Calculate the Error with the following formula and enter the value in Table 22-39. Keysight N9038A MXE Service Guide...
  • Page 707 20.Without changing any other setting on the EMI receiver or the IGUU 2916 EMI pulse generator change the Pulse Frequency on the pulse generator and the Sweeptime of the EMI receiver to the other values listed in Table 22-40 and repeat steps 18 and 19 for each. Keysight N9038A MXE Service Guide...

  • Page 708: Band B Testing

    9. Change the detector used by the EMI receiver to Peak by pressing Trace / Detector, More, Detector, Peak. 10.Turn on the marker by pressing Marker. 11.Record the marker value in Table 22-41 as the Measured value for Band B. Keysight N9038A MXE Service Guide...
  • Page 709 21.Without changing any other setting on the EMI receiver or the IGUU 2916 EMI pulse generator change the Pulse Frequency on the pulse generator and the Sweeptime of the EMI receiver to the other values listed in Table 22-42 and repeat steps 19 and 20 for each. Keysight N9038A MXE Service Guide...

  • Page 710: Band C Testing

    8. Change the detector used by the EMI receiver to Peak by pressing Trace / Detector, More, Detector, Peak. 9. Turn on the marker by pressing Marker. 10.Record the marker value in Table 22-43 as the Measured value for Band C. Keysight N9038A MXE Service Guide...
  • Page 711 20.Without changing any other setting on the EMI receiver or the IGUU 2916 EMI pulse generator change the Pulse Frequency on the pulse generator and the Sweeptime of the EMI receiver to the other values listed in Table 22-44 and repeat steps 18 and 19 for each. Keysight N9038A MXE Service Guide...

  • Page 712: Band D Testing

    Attenuation, 10 dB. 7. Set the amplitude units to dBµV by pressing AMPTD Y Scale, More, Y Axis Unit, More, dBµV. 8. Set the reference level to 80 dBµV by pressing AMPTD Y Scale, 80 dBµV. Keysight N9038A MXE Service Guide...
  • Page 713 +2.0 -2.0 +2.0 15.Calculate the Error for each of the Measured values in Table 22-45 with the following formula and enter the value in Table 22-45. Error = Measured – 40 dBµV – 12.61 dB Keysight N9038A MXE Service Guide...

  • Page 714: Emi Average Detector Accuracy

    Amplitude Range: -60 to 0 dBm a. Quantity 2 required for Option CNF (Type-N RF Input) b. Only required for Option C35 (3.5 mm RF Input) c. Only required for Option 544 (44 GHz RF Frequency Range) Keysight N9038A MXE Service Guide...

  • Page 715: Sine Wave Generator Characterization

    6. After allowing the power meter to settle, record the reading in Table 22-50 under the Power Meter column. 7. Set the IGUU 2916 EMI pulse generator to output a 100 MHz Sine Wave signal. Keysight N9038A MXE Service Guide...

  • Page 716: Initial Setup

    10.Turn on the marker by pressing Marker. 11.Record the marker value in Table 22-47 as the Measured value for Band A. 12.Calculate the Error with the following formula and enter the value in Table 22-47. Keysight N9038A MXE Service Guide...
  • Page 717 Lower Limit Error Upper Limit (dBµV) (dB) (dB) (dB) -2.0 +2.0 21.Put the marker in Delta mode by pressing Marker, Delta. 22.Turn on the continuous peak function by pressing Peak Search, More, Continuous Peak Search On. Keysight N9038A MXE Service Guide...

  • Page 718: Band B Testing

    7. Set the amplitude units to dBµV by pressing AMPTD Y Scale, More, Y Axis Unit, More, dBµV. 8. Set the reference level to 80 dBµV by pressing AMPTD Y Scale, 80 dBµV. Keysight N9038A MXE Service Guide...
  • Page 719 18.Once the sweep has completed find the peak of the detector output by pressing Peak Search. 19.Record the marker value in Table 22-51 as the Measured value for the Band B reference PRF. 20.Calculate the Error with the following formula and enter the value in Table 22-51. Keysight N9038A MXE Service Guide...

  • Page 720: Band C Testing

    Band C Testing 1. Set the IGUU 2916 EMI pulse generator to output a 100 MHz Sine Wave signal. 2. Connect the IGUU 2916 EMI pulse generator Output Sine Wave Generator to the EMI receiver RF Input. Keysight N9038A MXE Service Guide...
  • Page 721 17.Once the sweep has completed find the peak of the detector output by pressing Peak Search. 18.Record the marker value in Table 22-54 as the Measured value for the Band C reference PRF. 19.Calculate the Error with the following formula and enter the value in Table 22-54. Keysight N9038A MXE Service Guide...
  • Page 722 Table 22-55 EMI Average Variation with Repetition Frequency Band C – CISPR 16-1-1 :2010 Section 6.5.3 Band C Pulse Frequency (Hz) Lower Limit Measured Upper Limit (dB) (dB) (dB) 10000 5000 Reference 1000 -15.5 -10.5 Keysight N9038A MXE Service Guide...

  • Page 723: Band D Testing

    EMI Average Amplitude Relationship Band D – CISPR 16-1-1 :2010 Section 6.5.2 Band D Pulse Frequency (Hz) Measured Lower Limit Error Upper Limit (dBµV) (dB) (dB) (dB) 5000 -2.0 +2.0 15.Put the marker in Delta mode by pressing Marker, Delta. Keysight N9038A MXE Service Guide...
  • Page 724 Table 22-57 EMI Average Variation with Repetition Frequency Band D – CISPR 16-1-1 :2010 Section 6.5.3 Band D Pulse Frequency (Hz) Lower Limit Measured Upper Limit (dB) (dB) (dB) 10000 5000 Reference 1000 -15.5 -10.5 Keysight N9038A MXE Service Guide...

  • Page 725: Rms Average Detector Accuracy

    Amplitude Range: -60 to 0 dBm a. Quantity 2 required for Option CNF (Type-N RF Input) b. Only required for Option C35 (3.5 mm RF Input) c. Only required for Option 544 (44 GHz Frequency Range) Keysight N9038A MXE Service Guide...

  • Page 726: Sine Wave Generator Characterization

    6. After allowing the power meter to settle, record the reading in Table 22-69 under the Power Meter column. 7. Set the IGUU 2916 EMI pulse generator to output a 100 MHz Sine Wave signal. Keysight N9038A MXE Service Guide...

  • Page 727: Initial Setup

    10.Put the EMI receiver in single sweep operation by pressing Single. 11.Take a single sweep on the EMI receiver by pressing Restart. 12.Turn on the marker by pressing Marker. 13.Record the marker value in Table 22-59 as the Measured value for Band A. Keysight N9038A MXE Service Guide...
  • Page 728 Lower Limit Error Upper Limit (dBµV) (dB) (dB) (dB) -2.0 +2.0 22.Put the marker in Delta mode by pressing Marker, Delta. 23.Turn on the continuous peak function by pressing Peak Search, More, Continuous Peak Search On. Keysight N9038A MXE Service Guide...

  • Page 729: Band B Testing

    3. Preset the EMI receiver by pressing Mode Preset. 4. Tune the receiver to 10 MHz with a span of 0 Hz by pressing FREQ Channel, Center Freq, 10 MHz then SPAN X Scale, Zero Span. Keysight N9038A MXE Service Guide...
  • Page 730 18.Take a single sweep on the EMI receiver by pressing Restart. 19.Once the sweep has completed find the peak of the detector output by pressing Peak Search. 20.Record the marker value in Table 22-63 as the Measured value for the Band B reference PRF. Keysight N9038A MXE Service Guide...

  • Page 731: Band C Testing

    Measured Upper Limit (dB) (dB) (dB) 1000 Reference -11.5 -8.5 -18.1 -13.9 -22.5 -17.5 -27.8 -22.2 Band C Testing 1. Set the IGUU 2916 EMI pulse generator to output a 100 MHz Sine Wave signal. Keysight N9038A MXE Service Guide...
  • Page 732 16.Set the EMI receiver input attenuator to 0 dB by pressing AMPTD Y Scale, Attenuation, 0 dB. 17.Take a single sweep on the EMI receiver by pressing Restart. 18.Once the sweep has completed find the peak of the detector output by pressing Peak Search. Keysight N9038A MXE Service Guide...
  • Page 733 Table 22-67 RMS Average Variation with Repetition Frequency Band C – CISPR 16-1-1 :2010 Section 7.5.3 Band C Pulse Frequency (Hz) Lower Limit Measured Upper Limit (dB) (dB) (dB) 10000 11.5 1000 Reference -11.5 -8.5 Keysight N9038A MXE Service Guide...

  • Page 734: Band D Testing

    RMS Average Amplitude Relationship Band D – CISPR 16-1-1 :2010 Section 7.5.2 Band D Pulse Frequency (Hz) Measured Lower Limit Error Upper Limit (dBµV) (dB) (dB) (dB) 5000 -2.0 +2.0 15.Put the marker in Delta mode by pressing Marker, Delta. Keysight N9038A MXE Service Guide...
  • Page 735 Table 22-69 RMS Average Variation with Repetition Frequency Band D – CISPR 16-1-1 :2010 Section 7.5.3 Band D Pulse Frequency (Hz) Lower Limit Measured Upper Limit (dB) (dB) (dB) 10000 11.5 1000 Reference -11.5 -8.5 Keysight N9038A MXE Service Guide...

  • Page 736: Intermittent, Unsteady, Drifting Disturbances

    Amplitude Range: -40 to 0 dBm Narrow Pulse Modulation a. Quantity 2 required for Option CNF (Type-N RF Input) b. Only required for Option C35 (3.5 mm RF Input) c. Only required for Option 544 (44 GHz Frequency Range) Keysight N9038A MXE Service Guide...

  • Page 737: Initial Setup

    Amplitude: -20 dBm d. Pulse Period: 1.6 seconds e. Pulse Width: 0.16 seconds f. Pulse: On g. RF Output: On h. Modulation: Off 3. Connect the Signal Generator output to the EMI receiver RF Input. Keysight N9038A MXE Service Guide...
  • Page 738 Sine Wave Pulsed RF Lower Limit Delta Upper Limit Frequency (sec) Measured Measured (dB) (dB) (dB) (MHz) (dBm) (dBm) 0.125 0.16 -10.5 -7.5 0.16 -10.5 -7.5 0.10 -10.5 -7.5 0.10 -10.5 -7.5 1100 0.10 -10.5 -7.5 Keysight N9038A MXE Service Guide...

  • Page 739: Rms Average Detector Testing

    11.Take a single sweep on the EMI receiver by pressing Restart. 12.Once the sweep on the EMI receiver has completed and the auto peak value is found record the marker amplitude as the Sine Wave Measured value for the frequency being measured in Table 22-72. Keysight N9038A MXE Service Guide...
  • Page 740 18.Change the Pulse Width on the signal generator to the corresponding value for the Frequency being tested listed in Table 22-72. 19.Repeat steps 11 through 19 for the rest of the frequencies in Table 22-72. Keysight N9038A MXE Service Guide...
  • Page 741 Tests Intermittent, Unsteady, Drifting Disturbances Keysight N9038A MXE Service Guide...
  • Page 742 A1A5 front panel daughter board troubleshooting, connector part number, A7 midplane assembly see RF input connector removal, 632, part number, contacting Keysight, A1A5 Front Panel USB Interface Board A8 motherboard corrections menu description, description, description, CPU assembly A2 analog IF assembly...
  • Page 743 A13 RF front end assembly keypad front end control board part number, see A15 front end control assembly removal, 632, front end troubleshooting kit, Keysight Technologies front frame contacting, description, Sales and Service offices, packaging, part number, splash screen,...
  • Page 744 Index see A6 power supply, tools, 28, preload measurement service key description, applications, service menus, preselector service strategy, see A12 YTF Snapshot Alignments menu description, software licensing, software overview, specifications, splash screen, 40, 52, quasi-peak detector test, standby LED, static-safe workstation, status messages, support URL, support web site,...
  • Page 745 This information is subject to change without notice. © Keysight Technologies 2013-2019 Edition 1, April 2019 N9038-90029 www.keysight.com...

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