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MXS System Description and Installation Manual 

UM06945

 

© Sagetech Avionics 2022 Proprietary Confidential 

Page 23 of 56 

 

Table 4-5 Example Antennas 

Description 

Vendor 

Vendor PN

 

Transponder Antenna  

RAMI 

AV-22 

Transponder Antenna Blade 

RAMI 

AV-74 

 

4.4

 

Routing and Connecting the Antenna Cable 

Attach the antenna cable to the antenna SMA connector(s) shown in Figure 4-2. 

A  suitable  antenna  cable  consists  of  a  male  SMA  connector,  a  length  of  co-axial  cable,  and  a  suitable 
connector  for  the  antenna.  For  example,  if  using  a  simple  monopole  antenna  with  a  BNC  female 
connector, the antenna cable will need a BNC male connector. A cable part number for this example is 
provided in Table 4-6. 

Table 4-6 Antenna Cable Connector Parts 

Part Description 

Manufacturer 

Part Number 

SMA Male to BNC Male Right Angle Cable 24”

 

Pasternack 

PE3C0040-24 

 

The antenna cable must have no more than 2dB of signal loss from the MXS to the antenna. This includes 
losses in the connector and cable. Generic and custom-built cables can be obtained from suppliers such 
as Pasternak, Richardson, and Aircraft Spruce. 

Maintain coax cable minimum bend radius per manufacturers specifications. 

4.5

 

Connecting the Altitude Sensor/Encoder to the System Static Pressure 

MXS’s  integral  pressure  sensor  and  encoder  can  provide  altitude  data  for  Extended  Squitters  and 

interrogation replies when the altitude encoder port (see Figure 4-3) is connected to the aircraft static 
pressure source. 

Plumb the altitude encoder connection to a static pressure line that shares the same source as the main 
aircraft altimeter. 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.  

Содержание MXS

Страница 1: ...Sagetech Avionics 2022 Proprietary Confidential MXS System Description and Installation Manual UM06945 February 2022...

Страница 2: ...imitations 11 2 8 Regulatory Compliance 12 2 9 Environmental Specifications 13 3 0 System Overview 14 3 1 System Description 14 3 2 System Functionality 15 3 2 1 Transponder 15 3 2 2 ADS B In 15 3 2 3...

Страница 3: ...ower Up The MXS 32 7 3 Check For the Boot Loader Message 33 7 4 Send Installation Message 33 7 5 Send GPS Information 37 7 6 Send Operating message 39 7 7 Send Flight ID 42 7 8 ADS B In 43 7 9 Monitor...

Страница 4: ...nting 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 23 Figure 4 4 Cooling Methods vs Device Temperature 24 F...

Страница 5: ...ing 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...

Страница 6: ...the MXS a 50 ohm load must be connected to the SMA connector of any unused antenna port Use a commercially available 50 ohm load rated for pulses of 500W with a 1 duty cycle and a maximum VSWR of 1 5...

Страница 7: ...se harmful interference This device must accept any interference received including interference that may cause undesired operation Exposure Statement This device meets the FCC requirements for RF exp...

Страница 8: ...ve Power Requirements 28VDC 7 5 Watts nominal 20W maximum 14VDC 7 5 Watts nominal 20W maximum Inrush Current 6A Normal Operation range 14 28VDC Minimum and Maximum operating range 10 32VDC Electrical...

Страница 9: ...ATCRBS Mode S Transponder Airborne Equipment Air Traffic Control Radar Beacon System Mode Select ATCRBS MODE S Airborne Equipment C166b Class A2 C C 1090ES MHz ADS B and TIS B Equipment Extended Squit...

Страница 10: ...ort and multi site message support C112e Sagetech was granted a deviation from RTCA DO 181E 2 2 19 2 3 3 Multisite Comm B Closeout requirement is N A due to not implementing Air Initiated Comm B suppo...

Страница 11: ...stallation Approvals and System Limitations 1 This article meets the minimum performance and quality control standards required by the applicable technical standard orders TSOs Those installing this a...

Страница 12: ...14 CFR Part 91 225 MXS must be configured to meet requirements of 14 CFR 91 225 and 91 227 For MXS to be compliant with the ADS B out requirements of 14 CFR 91 225 and 91 227 a compliant position sou...

Страница 13: ...vival High Temp Altitude Decompression Test Overpressure Test 4 B4F1 40 C 70 C 40 C 70 C N A 55 C 85 C 55 000 Feet N A N A Temperature Variation 5 S1 1 Humidity 6 B Operational Shocks Crash Safety 7 B...

Страница 14: ...e 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 1 In this document the messa...

Страница 15: ...MXS System Description and Installation Manual UM06945 Sagetech Avionics 2022 Proprietary Confidential Page 15 of 56 Figure 3 1 Diagram of MXS Maximum Mode C Mode S Installation...

Страница 16: ...illance radar pulses per ICAO requirements The transponder replies to ATCRBS interrogations with a squawk code and pressure altitude data Provides Mode S replies includes data such as ICAO address and...

Страница 17: ...Pressure Altitude Encoder Computes own ship barometric altitude with an integral pressure sensor and encoder Calibrated up to 55 000ft Can be calibrated up to 85 000ft upon request 3 2 5 Attributes o...

Страница 18: ...ponder health information To comply with 14 CFR 91 225 with no operating limitations dynamic control is required The MXS Serial interface is defined in ICD02373 Table 3 1 Control Interface Communicati...

Страница 19: ...Mounting Holes Mounting the MXS 4 1 Mounting the MXS The MXS needs to be mounted in a location protected from weather MXS should be mounted away from sources of excess heat to better guarantee an oper...

Страница 20: ...ation Packet and the Status Packet If Accord protocol is used the SIL is set to 3 and the SDA is set to 2 automatically 3 Sagetech defined GPS message protocol as defined in ICD02373 and can be sent t...

Страница 21: ...s selected provide a 50 ohm termination for the MXS If only one antenna is used that antenna must be connected to the bottom SMA connector on the MXS In this case the following should be done The unus...

Страница 22: ...e is required for most antennas appropriate for MXS Failure to provide a adequate ground plane can result in degradation of antenna performance Ground plane radius should be roughly the same length as...

Страница 23: ...k PE3C0040 24 The antenna cable must have no more than 2dB of signal loss from the MXS to the antenna This includes losses in the connector and cable Generic and custom built cables can be obtained fr...

Страница 24: ...if the ambient temperature is 55 C and the temperature rise of the MXS is 35 C see plots below then the MXS internal junction temperature would be 85 C and the MTBF will have degraded performance If...

Страница 25: ...20 1 LFM on top and side surfaces The temperature protection limit at 110 C applies to the average internal device temperature The average device temperature is representative of the majority of PCBA...

Страница 26: ...Mechanical Attributes Weight 7oz Finish COATED PER MIL PRF 85285 TY I CL H COLOR LIGHT GRAY PER FED STD 595 26373 FINISH COAT APPLIED OVER PRIMER MIL PRF 23377 TY I CL N Figure 5 1 MXS Dimensions 5 2...

Страница 27: ...1 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 Figure 5 4...

Страница 28: ...raft The DC power pins of the MXS are protected from overvoltage up to 50VDC and reverse polarity conditions The Maintenance Mode signal is a discrete input that allows the flight computer to perform...

Страница 29: ...when another on board L Band equipment is transmitting This prevents interferences from own ship L Band transmitters It is typically used when aircraft equipage includes Transponders TCAS and or DME...

Страница 30: ...m1 422 TX 8 9 Com1 232 TX Output RS 422 TX RS 232 TX 23 Ethernet TX 9 Output IEEE 802 3 24 Ethernet RX 9 Input IEEE 802 3 25 GND Power Ground 26 GND Power Ground 27 Reserved 28 Reserved 29 Reserved 30...

Страница 31: ...m1 422 TX 8 9 Output RS 422 TX 48 Ethernet TX 9 Output IEEE 802 3 49 Ethernet RX 9 Input IEEE 802 3 50 DC Power 11 Power 14 28VDC 51 DC Power 11 Power 14 28VDC Table 6 2 Communication Port Options Ser...

Страница 32: ...22 Proprietary Confidential Page 32 of 56 Serial Bus Type Required Configuration Main Connector Interface Signal Pin RS 232 Com1 Com1 Mode pin 43 is tied to ground Com1 232 RX 21 Com1 232 TX 22 Com1 M...

Страница 33: ...sponder functionality but it should not be used to send position information to the transponder in flight For detailed procedures using the MXS Com Test GUI refer to UM06951 7 1 Setup Equipment Config...

Страница 34: ...ing the config Cfg tab in the GUI The MXS must be in OFF mode and the Maintenance Mode Pin must be grounded The following information is set with the Installation message ICAO Address o A 24 bit numbe...

Страница 35: ...e Point Obstacle Cluster Obstacle Line Obstacle Unknown Aircraft Maximum speed o Max airspeed of aircraft used in ACAS TCAS systems The categories are as shown below Table 7 3 Max Airspeed Maximum Air...

Страница 36: ...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 a...

Страница 37: ...et by an authorized person following 14 CFR 91 41 This configuration filed is used to ensure the altitude encoder properly corresponds to the primary flight altimeter as described in AC 43 6D Weight o...

Страница 38: ...d or NMEA can be used in place of this message The screenshot below uses the simulated GPS The data in the GPS message can be changed by editing the fields in the GPS message Tab The specific details...

Страница 39: ...MXS System Description and Installation Manual UM06945 Sagetech Avionics 2022 Proprietary Confidential Page 39 of 56 Figure 7 4 GPS Message...

Страница 40: ...n ICD02373 ADS B Enable Disable o Setting ADS B to enable will enable ADS B Extended Squitters DF17 o With ADS B Disabled the MXS will still send Acquisition Squitters DF11 and it will still receive A...

Страница 41: ...ge Squawk De asserted Valid Valid Op Message Squawk Asserted Invalid Invalid 1000 Asserted Invalid Valid Civil Settings Squawk Asserted Valid Invalid 1000 Asserted Valid Valid Civil Settings Squawk He...

Страница 42: ...MXS System Description and Installation Manual UM06945 Sagetech Avionics 2022 Proprietary Confidential Page 42 of 56 Figure 7 5 Operating Message...

Страница 43: ...agetech Avionics 2022 Proprietary Confidential Page 43 of 56 7 7 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...

Страница 44: ...ere the target request message was received 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 req...

Страница 45: ...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 System Fail Flag Weight on Wheels Maintenance Mode Al...

Страница 46: ...t 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 GPS Input minimum 1 Hz frequency Va...

Страница 47: ...e System Latency Check Transmit Power Failure Readiness functionality of Transducer only affects the XPDR bit in the ACK message if PT is enabled GPS Position is invalid ICAO Address All 1 s or 0 s In...

Страница 48: ...sh Image CRC Valid Memory Test Calibrated data RF Loopback 53V Supply Failure ADC Ready Pressure Transducer Ready FPGA Ready RX Oscillator Locked TX Oscillator Locked Mutual Suppression Valid Temperat...

Страница 49: ...nstruction set and passes the numerical result of the test to the FPGA for verification The MXS accepts the result of this test Pass or Fail from the FPGA Power Up Fail Flag is latched causing a XPDR...

Страница 50: ...e Indication else clears it The 53V Power Valid flag is the invert 53V Voltage Failure indication Test is part of the Continuous BIT suite of tests XPDR Fail Flag is set in the ACK message to the Host...

Страница 51: ...ntinuous BIT suite of tests XPDR Fail Flag is set in the ACK message to the Host Putting the unit in standby mode or powering off i e cutoff power or ground pin 42 for MX Power control will speed up t...

Страница 52: ...tests XPDR Fail Flag is set in the ACK message to the Host Check the supply voltage if voltage is in range attempt a Power cycle The unit is damaged if the failure persists 6 ICAO Address Valid The MX...

Страница 53: ...tallation Manual UM06945 Sagetech Avionics 2022 Proprietary Confidential Page 53 of 56 8 0 Revision History Rev Summary of Changes Effective Date Approval 01 Initial release Feb 2022 CR00468 02 Update...

Страница 54: ...MXS System Description and Installation Manual UM06945 Sagetech Avionics 2022 Proprietary Confidential Page 54 of 56 9 0 Appendix A Shielded Cable Assembly Construction...

Страница 55: ...MXS System Description and Installation Manual UM06945 Sagetech Avionics 2022 Proprietary Confidential Page 55 of 56...

Страница 56: ...MXS System Description and Installation Manual UM06945 Sagetech Avionics 2022 Proprietary Confidential Page 56 of 56...

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