National Instruments NI PXIe-5171R Calibration Procedure

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CALIBRATION PROCEDURE

NI PXIe-5171R

This document contains the verification and adjustment procedures for the NI PXIe-5171R

(NI 5171R). Refer to

Contents

Required Software.....................................................................................................................1

Related Documentation.............................................................................................................2

Test Equipment..........................................................................................................................2

Test Conditions..........................................................................................................................5

Password................................................................................................................................... 6

Calibration Interval................................................................................................................... 6

As-Found and As-Left Limits................................................................................................... 6

Measurement Uncertainty......................................................................................................... 6

Calibration Overview................................................................................................................ 6

Test System Characterization....................................................................................................7

Zeroing the Power Sensor................................................................................................. 7

Characterizing Power Splitter Amplitude Imbalance....................................................... 7

Verification.............................................................................................................................. 11

Verifying Timebase Accuracy.........................................................................................12

Verifying DC Accuracy...................................................................................................13

Verifying AC Amplitude Accuracy.................................................................................15

Verifying Flatness and Bandwidth.................................................................................. 19

Adjustment.............................................................................................................................. 23

Adjusting DC.................................................................................................................. 23

Adjusting Timebase.........................................................................................................24

Reverification..........................................................................................................................25

Updating Verification Date and Time..................................................................................... 25

Worldwide Support and Services............................................................................................ 25

Required Software

Calibrating the NI 5171R requires you to install the following software on the calibration

system:

•

LabVIEW Instrument Design Libraries for Reconfigurable Oscilloscopes. The NI 5171R

was first supported in LabVIEW Instrument Design Libraries for Reconfigurable

Oscilloscopes 14.0.

You can download all required software from ni.com/downloads.

ni.com/calibration

for more information about calibration solutions.

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Summary of Contents for National Instruments NI PXIe-5171R

Page 1: Table Of Contents
CALIBRATION PROCEDURE NI PXIe-5171R This document contains the verification and adjustment procedures for the NI PXIe-5171R (NI 5171R). Refer to ni.com/calibration for more information about calibration solutions. Contents Required Software........................1 Related Documentation......................2 Test Equipment..........................2 Test Conditions..........................5 Password........................... 6 Calibration Interval........................6 As-Found and As-Left Limits....................
Page 2: Related Documentation
25 µV) into 50 Ω SMA (m)-to- Fairview Microwave Verifications: Frequency range: DC to BNC (f) adapter SM4723 11 MHz • Timebase accuracy Impedance: 50 Ω • DC accuracy Adjustments: • Timebase • 2 | ni.com | NI PXIe-5171R Calibration Procedure...
Page 3 BNC (f) • AC amplitude accuracy SMA (m)-to- — Verifications: Frequency range: DC to BNC (m) cable 275 MHz • AC amplitude (x2) accuracy Impedance: 50 Ω Length: <1 meter NI PXIe-5171R Calibration Procedure | © National Instruments | 3...
Page 4 VSWR: <1.08 • Flatness and Amplitude tracking: bandwidth <0.5 dB 50 Ω SMA Fairview Microwave Test system Frequency range: DC to terminator (f) ST1825F characterization 275 MHz VSWR: <1.05 Impedance: 50 Ω 4 | ni.com | NI PXIe-5171R Calibration Procedure...
Page 5: Test Conditions
Ensure that the PXI chassis fan speed is set to HIGH, that the fan filters (if present) are clean, and that the empty slots contain slot blockers and filler panels. For more NI PXIe-5171R Calibration Procedure | © National Instruments | 5...
Page 6: Password
GUM (Guide to the Expression of Uncertainty in Measurement), for a confidence level of 95%. The expressed uncertainty is based on the recommended measurement methodology, standards, metrology best practices and environmental conditions of the National Instruments laboratory. It should be considered as a guideline for the level of measurement uncertainty that can be achieved using the recommended method.
Page 7: Test System Characterization
The results of the characterization are later used as a correction in the Verifying Flatness and Bandwidth procedure. Table 2. Power Splitter Characterization Configuration Test Point Frequency (MHz) Amplitude (dBm) 0.05 -0.5 50.1 -0.5 100.1 -0.5 150.1 -0.5 NI PXIe-5171R Calibration Procedure | © National Instruments | 7...
Page 8 Connect the other SMA (m)-to-SMA (m) adapter to the other output port of the power splitter. Refer to this assembly as splitter output 2. Connect the power sensor to splitter output 2. The following figure illustrates the hardware setup. 8 | ni.com | NI PXIe-5171R Calibration Procedure...
Page 9 12. Disconnect the power sensor and 50 Ω SMA terminator (f) from splitter output 2 and splitter output 1. 13. Connect the power sensor to splitter output 1. NI PXIe-5171R Calibration Procedure | © National Instruments | 9...
Page 10 1 power, where each configuration has a corresponding value. 19. Calculate the splitter imbalance for each frequency point using the following equation: splitter imbalance = splitter output 2 power - splitter output 1 power 10 | ni.com | NI PXIe-5171R Calibration Procedure...
Page 11: Verification
Refer to the following figure for the names and locations of the NI 5171R front panel connectors. You can find information about the functions of these connectors in the device getting started guide. NI PXIe-5171R Calibration Procedure | © National Instruments | 11...
Page 12: Verifying Timebase Accuracy
Follow this procedure to verify the frequency accuracy of the NI 5171R onboard timebase using an oscilloscope calibrator. Table 3. Timebase Accuracy Verification As-Found Limit As-Left Limit Measurement Uncertainty 25 PPM 1.6 PPM 0.2 PPM 12 | ni.com | NI PXIe-5171R Calibration Procedure...
Page 13: Verifying Dc Accuracy
= 23 °C. Uncertainty of the 9500B includes long-term stability of 1 year (5 years for frequency), temperature coefficient, linearity, load, and line regulation and traceability of factory and National Calibration Standard. NI PXIe-5171R Calibration Procedure | © National Instruments | 13...
Page 14 Configure the NI 5171R with the following settings: • Bandwidth: the Bandwidth value from the DC Accuracy Verification table • Vertical range: the Vertical Range value from the DC Accuracy Verification table 14 | ni.com | NI PXIe-5171R Calibration Procedure...
Page 15: Verifying Ac Amplitude Accuracy
50 kHz AC voltage measured by the NI 5171R to the 50 kHz AC voltage measured by the DMM. Refer to the following table as you complete the following steps: NI PXIe-5171R Calibration Procedure | © National Instruments | 15...
Page 16 80 μs, and Auto Zero enabled • The cable from the BNC Tee to the DMM must be 1 meter or less • Pasternack SMA Adapter (M-M) PE9069 • Pasternack SMA Tee PE9246 16 | ni.com | NI PXIe-5171R Calibration Procedure...
Page 17 Bandwidth: the Bandwidth value from the AC Amplitude Accuracy Verification table • Vertical range: the Vertical Range value from the AC Amplitude Accuracy Verification table • Sample rate: 250 MS/s • Number of samples: 1,048,576 samples NI PXIe-5171R Calibration Procedure | © National Instruments | 17...
Page 18 17. Connect the DMM and function generator to channel 7 of the NI 5171R as shown in the AC Verification Test Connections figure and repeat steps 2 through 9 for each configuration listed in the AC Amplitude Accuracy Verification table. 18 | ni.com | NI PXIe-5171R Calibration Procedure...
Page 19: Verifying Flatness And Bandwidth
Fairview Microwave SMA Adapter (M-M) SM4960 • Cable from power splitter to signal generator is 1 meter or less The 0.05 MHz test point is used to normalize the remaining test points. NI PXIe-5171R Calibration Procedure | © National Instruments | 19...
Page 20 Fairview Microwave SMA Adapter (M-M) SM4960 • Cable from power splitter to signal generator is 1 meter or less The 0.05 MHz test point is used to normalize the remaining test points. 20 | ni.com | NI PXIe-5171R Calibration Procedure...
Page 21 Bandwidth: the Bandwidth value from the Flatness and Bandwidth Verification table • Vertical range: the Vertical Range value from the Flatness and Bandwidth Verification table • Sample rate: 250 MS/s • Number of samples: 1,048,576 samples NI PXIe-5171R Calibration Procedure | © National Instruments | 21...
Page 22 17. Connect splitter output 2 of the power sensor assembly to channel 4 of the NI 5171R and repeat steps 2 through 12 for each configuration listed in the Flatness and Bandwidth Verification table. 22 | ni.com | NI PXIe-5171R Calibration Procedure...
Page 23: Adjustment
13. Connect the calibrator test head to the channel 2 input of the NI 5171R using the SMA (m)-to-BNC (f) adapter and repeat steps 5 through 11, changing the value of the channels parameter from 1 to 2. NI PXIe-5171R Calibration Procedure | © National Instruments | 23...
Page 24: Adjusting Timebase
Actual Frequency Generated: The frequency of the sine wave present on channel 0 of the NI 5171R Repeat steps 6 through 8 until the Timebase Cal Complete indicator from the Timebase Cal Adjust VI returns TRUE. 10. Disable the calibrator output. 24 | ni.com | NI PXIe-5171R Calibration Procedure...
Page 25: Reverification
Wire the current calibration password to the calibration password parameter. The default password is Worldwide Support and Services The National Instruments website is your complete resource for technical support. At ni.com/ support, you have access to everything from troubleshooting and application development self-help resources to email and phone assistance from NI Application Engineers.
Page 26 National Instruments corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas, 78759-3504. National Instruments also has offices located around the world. For telephone support in the United States, create your service request at ni.com/support...

National Instruments NI PXIe-5171R Calibration Procedure

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