Summary of Contents for Sagetech MXS
- Page 1 MXS System Description and Installation Manual UM06945 February 2022 © Sagetech Avionics 2022 Proprietary Confidential...
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Page 2: Table Of Contents
ADS-B In ........................15 3.2.3 ADS-B Out........................ 16 3.2.4 Altitude Encoder ..................... 16 3.2.5 Attributes of the MXS transponder include the following ........16 3.2.6 Control Interface ..................... 17 Installation ......................... 17 Mounting the MXS ......................18 Connecting the GPS Interface ..................19 Connecting the RF Antennas .................. - Page 3 MXS System Description and Installation Manual UM06945 Electrical Characteristics ....................27 Main Connector ......................27 Power up Process ....................... 32 Setup Equipment ......................32 Power Up The MXS ......................32 Check For the Boot Loader Message ................33 Send Installation Message....................33 Send GPS Information ....................
- Page 4 Figure 3-2 System Block Diagram of MXS Minimum Mode C/Mode S Installation ........15 Figure 4-1 Diagram and Identification of MXS Connectors and Mounting Holes Mounting the MXS ..18 Figure 4-2 Connectors to Top and Bottom Antenna ................... 20 Figure 4-3 Pressure Altitude Encoder Port to Static Pressure ..............
- Page 5 Table 4-2 List of Common Mounting Parts and Vendors ................19 Table 4-3 List of Common Mounting Parts and Vendors ................20 Table 4-4 MXS Antenna Requirements ....................... 21 Table 4-5 Example Antennas ........................22 Table 4-6 Antenna Cable Connector Parts ....................22 Table 5-1 Mechanical Attributes .........................
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Page 6: Introduction
1.2.2 Electromagnetic Exposure Statements and Warnings The MXS equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 87 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. - Page 7 A minimum separation of persons to the antenna of 20cm must be observed. FCC Warnings Changes or modifications not approved by Sagetech could void the user’s authority to operate the equipment. © Sagetech Avionics 2022 Proprietary Confidential Page 7 of 56...
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Page 8: System Information
(Class 1 Transponder) 250W - 500W Transponder Level 2[dels] Scheduled Maintenance The MXS Transponder must be inspected and tested every 24 months subject to the requirements of FAA documents 14 CFR Part 43 Appendix F. Repairability Repairs performed at the FAA certified Repair Station. -
Page 9: Tso Authorizations
MXS System Description and Installation Manual UM06945 TSO Authorizations The MXS meets the following TSO’s. Class/Type DO-178C/ Function TSO Title DO-254 DAL C112e Class 1 ATCRBS / Mode S Air Traffic Control Radar Beacon Level 2[dels] Transponder System/Mode Select Airborne Equipment... -
Page 10: Tso Deviations And Incomplete
Sagetech was granted a deviation from TSO-C166b Paragraphs 3.e and 6.h to use RTCA/DO-178C in place of RTCA/DO-178B. C88b Sagetech was granted a deviation from TSO-C88b Paragraphs 3.e and 6.h to use RTCA/DO- 178C in place of RTCA/DO-178B. C88b Sagetech was granted a deviation from TSO-C88b Paragraph 3.d to use RTCA/DO-160G in place of RTCA/DO-160E. -
Page 11: Device Marking
The Part number 10-0000 includes the released hardware and software configuration. Continued airworthiness Every 24 Calendar months the MXS must be checked for Transponder and Altitude Encoder performance. The Transponder must be tested, inspected and found to comply with 14 CFR Part 91.413 as described in 14 CFR 43 Appendix F. -
Page 12: Regulatory Compliance
91.215, 91.225, and 91.227. While in airspace with transponder equipage requirements specified in 14 CFR 91.215, MXS must be maintained to 14 CFR Part 91.413. While in ADS-B out airspace specified 14 CFR Part 91.225, MXS must be configured to meet requirements of 14 CFR 91.225 and 91.227. -
Page 13: Environmental Specifications
MXS System Description and Installation Manual UM06945 Environmental Specifications The MXS was designed and verified to perform its intended function while operating in the environments listed in Table 2-1. Table 2-1 List of Environmental Operating Conditions DO-160G Category Environment Section... -
Page 14: System Overview
, GPS Sensor, Barometric Pressure Source, and Aircraft Control Signals. Figure 3-1 is a block diagram depiction of the maximum integration of MXS. A minimum Mode C/Mode S installation is shown in Figure 3-2. In this document, the messaging protocol used to communicate between the MXS, and the host (typically a Flight Computer or Autopilot) will be referred to as the “Host Interface”. -
Page 15: Figure 3-1 Diagram Of Mxs Maximum Mode C/Mode S Installation
MXS System Description and Installation Manual UM06945 Figure 3-1 Diagram of MXS Maximum Mode C/Mode S Installation © Sagetech Avionics 2022 Proprietary Confidential Page 15 of 56... -
Page 16: System Functionality
• ES messages report Position, Velocity, Identification and Category, Target State and Status, and Aircraft Operational Status. From this data, MXS generates ADS-B, TIS-B and ADS-R reports for delivery to the flight computer which communicates the data to the user. -
Page 17: Ads-B Out
Aircraft Operational Status, and other aircraft data. There is no way to disable Acquisition squitter independently of the Mode S functionality • Altitude data for the ES can be based on the MXS’s integrated altitude encoder, or one provided external to the MXS. •... -
Page 18: Installation
While operating the MXS the serial interface allows the user to change the operating mode, enable Ident, change emergency status, and get critical system and transponder health information. -
Page 19: Mounting The Mxs
• Control Interface with Annunciation Figure 4-1 shows a labeled diagram of MXS’s connectors and mounting holes, which should be used as a reference during the installation process. Note: The Main Connector and its connection to the MXS are described in Section 5.2 Mechanical Connection and Section 6.0 Electrical Characteristics. -
Page 20: Connecting The Gps Interface
GPS data must be provided to the MXS from the aircraft system in one of three ways: 1. NMEA data sent via RS232/RS422 to COM0 or COM1. MXS accepts GGA, GLL, RMC and VTG NMEA sentences. If NMEA Protocol is used, then SIL and SDA are set to 0 automatically. -
Page 21: Connecting The Rf Antennas
(labeled ‘T’) and the bottom antenna (labeled ‘B’) connects to the right connector. Whenever power is applied to the MXS, a 50-ohm load must be provided to both of the SMA connections. Ensure that the antenna(s) selected provide a 50-ohm termination for the MXS. -
Page 22: Table 4-4 Mxs Antenna Requirements
Take care not to over-torque the antennas attempting to reduce a gap between the antenna and the mounting surface; torque the antenna to the manufacturer’s instructions. Note: MXS performance (range) may be hindered or damage to the MXS could result if installation does not meet all of the requirements above. -
Page 23: Routing And Connecting The Antenna Cable
The pressure barb is sized 0.18" (or 3/16”) Internal Diameter (ID) tubing. A typical installation will have a T or Y fitting in the static pressure line with one end running to the MXS. Suitable Y-barbed tube fittings are available from suppliers such as McMaster-Carr. -
Page 24: Cooling Requirements
Figure 4-3 Pressure Altitude Encoder Port to Static Pressure Cooling Requirements The MXS is designed such that its case conducts thermal load to the aircraft frame through the bottom (Non-Labeled) side. The transponder can be firmly mounted directly to the aircraft, or to other components within the aircraft. - Page 25 MXS System Description and Installation Manual UM06945 • (a) device on insulated closed-cell foam pad, natural convection only on top and side surfaces. • (b) device on insulated closed-cell foam pad, ducted forced air cooling at 20.1 LFM on top and side surfaces.
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Page 26: Mechanical Characteristics
Mechanical Characteristics Dimension, Weight & Material The MXS measures approximately 3.50in (89.0mm) x 2.09in (53.0mm) x 1.00in (25.4mm). Table 5-1 lists the weight, color, and material attributes of the MXS. Figure 5-1 shows MXS dimensions. Table 5-1 Mechanical Attributes <7oz... -
Page 27: Mxs Main Connector
Figure 5-2 Mechanical Connections 5.2.1 MXS Main Connector The MXS Main Connector is a 51-pin Micro-D type female connector that provides aircraft power and the Host Interface. Figure 5-3 shows the MXS Main Connector (Omnetics P/N: A99601-512) with pin locations and signal pinout. -
Page 28: Electrical Characteristics
Figure 5-4 Transponder Main Connector - Front View Connecting the MXS Main Connector to the host requires that a shielded cable be constructed, an example of which is shown in Appendix A –Shielded Cable Assembly Construction. Refer to AC 43.13-1B Chapter 11 for guidance if new power wiring is required. -
Page 29: Table 6-1 Pin-Out Definition
Ground Pin 10 - 35 short Bi-Directional Pass-through MXS has a common ground, all pins are internally connected. Ideal installation utilizes all ground pins to provide best ground return path. © Sagetech Avionics 2022 Proprietary Confidential Page 29 of 56... - Page 30 RS-422 bus will be selected if pins are left unconnected. The pin must be grounded to select RS-232 bus. (See Table 6-2) Transmit and receive are from the MXS perspective. Connect as appropriate. There must be at least one COM port connected for control.
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Page 31: Table 6-2 Communication Port Options
MXS System Description and Installation Manual UM06945 Signal Direction Signal Char. Number Reserved Pin 12 -37 short. Bi-Directional Pass-through Reserved Input GND/Open Loss of Communications Power Ground Bi-Directional Suppress Input GND/Open MXS Power Control Input GND/Open Com1-Mode Input RS-422 RX-... - Page 32 MXS System Description and Installation Manual UM06945 Serial Bus Type/ Required Main Connector Interface Configuration Signal RS-232 Com1 Com1-232-RX Com1-Mode pin 43 is tied to ground Com1-232-TX Com1-Mode Ethernet Ethernet-TX+ Ethernet-RX+ Ethernet-TX- Ethernet-RX- © Sagetech Avionics 2022 Proprietary Confidential Page 32 of 56...
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Page 33: Power Up Process
UM06945 Power up Process In the following steps an example power up process is shown using a Sagetech provided GUI. The Sagetech MXS GUI communicates with the Sagetech defined protocol as specified in the ICD02373. This GUI simulates a GPS Position for the purpose of testing transponder functionality, but it should not be used to send position information to the transponder in flight. -
Page 34: Check For The Boot Loader Message
Send Installation Message The installation message (Type 0x01) can be set and sent to the MXS by expanding the config (Cfg) tab in the GUI. The MXS must be in OFF mode and the Maintenance Mode Pin must be grounded. -
Page 35: Table 7-2 Emitter Categories
• Registration o The Registration is typically the tail number of the aircraft. This value is used as the callsign unless the Flight ID message is being sent to the MXS. • Altitude Resolution o The altitude resolution that is reported in Mode S and ADS-B can be changed to be either 25’... -
Page 36: Table 7-4 Baud Rate Options
IP Port: 2222 ▪ Net Mask 255.255.255.0 o The MXS sets the default gateway to [X].[Y].[Z].1 where [X], [Y], [Z] correspond to the first, second, and third bytes of the IP Address, respectively. • SIL/SDA - Source Integrity Level (SIL) and System Data Assurance (SDA) values are set following the guidance of AC 20-165B. - Page 37 • Weight on Wheels Connected o With this bit selected the MXS will use the state of the GND/Open Discrete input (Pin 16) to determine airborne or ground status. If Pin 16 is grounded the aircraft is in the ground state and if the signal is open it is in the airborne state.
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Page 38: Send Gps Information
GPS message are shown in ICD02373. Note: The information in the bottom bar of the MXS GUI is only updated when an ACK is received in response to a message sent to the MXS. The Go/No-Go light is highlighted green showing that there are no System or Transponder failures. -
Page 39: Figure 7-4: Gps Message
MXS System Description and Installation Manual UM06945 Figure 7-4: GPS Message © Sagetech Avionics 2022 Proprietary Confidential Page 39 of 56... -
Page 40: Send Operating Message
Send Operating message Begin transmissions of the Operating Message (Type 0x03) to the MXS at 1 Hz. Before going into “On” or “Alt” make sure the antenna is adequately loaded. The data that is contained in the operating message is: •... -
Page 41: Table 7-6 Squawk Code Logic
Valid Civil Settings Squawk • Heading and Airspeed o Heading and airspeed information can optionally be sent in to the MXS. If this is done the guidance in AC 20-165B must be followed. • Altitude Rate o Altitude rate (vertical rate) source should be sent in to the MXS following the guidance of AC 20-165B. -
Page 42: Figure 7-5 Operating Message
MXS System Description and Installation Manual UM06945 Figure 7-5 Operating Message © Sagetech Avionics 2022 Proprietary Confidential Page 42 of 56... -
Page 43: Send Flight Id
Send Flight ID If a Flight ID is used, then begin transmissions of the Flight ID Message (Type 0x02) to the MXS at a minimum of 0.2 Hz. The Flight ID value can be changed under the Config (Cfg) tab. -
Page 44: Ads-B In
The MXS will send target updates to the Host/Autopilot within 500ms of receiving the update. For systems that only want the ADS-B In data to be sent upon request and at defined payload lengths the summary report can be used. -
Page 45: Monitor Health And Status
MXS System Description and Installation Manual UM06945 Monitor Health and Status Review the Acknowledge (ACK) Messages (Type 0x80) returned after any message sent to the MXS to confirm that the MXS has a healthy BIT status: • XPDR Fail Flag •... -
Page 46: Health Monitoring And Built-In-Test (Bit)
7.11 System Health and Status Overview The MXS System health is monitored by reading the ACK message that the MXS will send to the flight computer in response to any message received. The System Fail monitors the required system inputs to the MXS. For proper operation, the following inputs are required: •... -
Page 47: Status Response Messages
MXS System Description and Installation Manual UM06945 ACK Message • GPS Position is invalid • System Fail: ICAO Address = All 1’s or 0’s • Input Supply Voltage failure WOW: XPDR Fail: Maint Mode: Alt Source: Host Pressure Alt: 120 ft. - Page 48 MXS System Description and Installation Manual UM06945 Status Response Message • Power-up BIT • Continuous BIT • Processor Test • Flash Image CRC Valid • Memory Test • Calibrated data • RF Loopback • 53V Supply Failure • ADC Ready •...
- Page 49 What to do about? Name BIT0 Power-On Tests Checks RAM, ROM, I/O, Timing, CPU If any of the Power Up BIT tests are failing MXS sets Request Status message to (msb) Pass instruction integrity, and calibration data. this BIT. Power-Up Fail Flag is latched causing a XPDR get details about the specific fail flag in the ACK message.
- Page 50 ADC persists Pressure If the MXS is unable to read the pressure Test is part of the Continuous BIT suite of tests. Attempt a Power cycle. The Transducer Ready sensor, then the MXS set ‘Pressure Sensor XPDR Fail Flag is set in the ACK message to the Host.
- Page 51 Transmissions are dropped to avoid damage to MXS Determine and eliminate the Range the MXS to ensure that an unsafe limit will transmitter hardware. Test is part of the Continuous source of over-interrogation never be reached that could result in HW BIT suite of tests.
- Page 52 10 V or greater XPDR Fail Flag is set in the ACK message to the Host. voltage is in range, attempt a than 32 V, then the MXS sets the Supply Power cycle. The unit is Voltage Failure indication; else clears it.
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Page 53: Revision History
MXS System Description and Installation Manual UM06945 Revision History Effective Summary of Changes Date Approval Initial release Feb 2022 CR00468 Update to WOW logic Feb 2022 CR00498 © Sagetech Avionics 2022 Proprietary Confidential Page 53 of 56... -
Page 54: Appendix A -Shielded Cable Assembly Construction
MXS System Description and Installation Manual UM06945 Appendix A –Shielded Cable Assembly Construction © Sagetech Avionics 2022 Proprietary Confidential Page 54 of 56... - Page 55 MXS System Description and Installation Manual UM06945 © Sagetech Avionics 2022 Proprietary Confidential Page 55 of 56...
- Page 56 MXS System Description and Installation Manual UM06945 © Sagetech Avionics 2022 Proprietary Confidential Page 56 of 56...