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Limitations

GDL 90 Installation Manual

560-1049-02 Rev. B

3-3

3.2.6

Antenna Installation – General

Antenna installation in the pressure vessel of pressurized aircraft is beyond the scope of the GDL 90
STC. Additional manufacturer's data may be necessary and FAA approval may be required to cover the
installation of any antenna in the pressure vessel of a pressurized aircraft.

3.2.7

Equipment Interfaced to the GDL 90

Any aircraft systems, other than those shown in this installation manual, that interface to the GDL 90 are
outside the scope of this manual and may require further evaluation and/or certification approval.

All equipment interfaced to the GDL 90 must be previously or concurrently approved.

3.2.8 Traffic

Display

If the GDL 90 is interfaced to a display that uses the GDL 90 Traffic Alert function (such as the GMX
200), the display Pilot’s Guide must contain the following information:

Traffic Alerting is only provided for target aircraft that report an integrity value (or containment
radius) of less than 1.0 nautical miles Traffic position reports are provided for all targets
regardless of their integrity. Traffic that is not eligible for traffic alerting is depicted using an
appropriate display icon.

3.2.9

Preservation of Previous Systems

It is the installer’s responsibility to preserve the essential characteristic of the aircraft being modified by
this manual to be in accordance with the aircraft manufacturer’s original design. This includes the
preservation of multiple power buses, which reduce the probability of interrupting power to essential
instruments and avionics.

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Summary of Contents for GDL 90

Page 1: ...GDL 90 UAT Data Link Sensor Installation Manual October 2006 560 1049 02 Rev B ...

Page 2: ... downloaded or stored in any storage medium for any purpose without the express written permission of Garmin Garmin hereby grants permission to download a single copy of this manual and of any revision to this manual onto a hard drive or other electronic storage medium to be viewed for personal use provided that such electronic or printed copy of this manual or revision must contain the complete t...

Page 3: ...is not compatible with SATCOM equipment Clarified note regarding use of existing GPS antennas 2 10 Added recommended circuit breaker size and placard information 3 1 Updated the operational limitations 3 2 Update the description of the limitations regarding single point squawk code entry 3 2 2 Add an instruction to check the correct box for GDL 90 control in the FMS 3 2 4 Updated the list of appro...

Page 4: ... 1 1 A 4 2 A C 3 A 1 2 B 4 3 A C 4 A 1 3 A 4 4 A C 5 A 1 4 B 4 5 A C 6 A 1 5 B 4 6 A 1 6 B 4 7 A D 1 A 1 7 B 4 8 A D 2 A 1 8 B 4 9 B D 3 A 1 9 A 4 10 B 1 10 A 4 11 B 4 12 A 2 1 A 4 13 B 2 2 A 4 14 A 2 3 A 4 15 A 2 4 A 4 16 A 2 5 A 4 17 A 2 6 A 4 18 B 2 7 A 4 19 B 2 8 B 4 20 A 2 9 B 2 10 A 5 1 A 2 11 A 5 2 A 2 12 A 5 3 A 2 13 A 5 4 B 2 14 A 5 5 A 2 15 A 5 6 A 2 16 A 2 17 A 6 1 A 2 18 A 6 2 A 2 19 A...

Page 5: ... EQUIPMENT 1 9 1 6 PACKAGE CONTENTS 1 9 1 7 DEFINITIONS ACRONYMS 1 10 2 INSTALLATION 2 1 2 1 PRE INSTALLATION INFORMATION 2 1 2 2 INSTALLATION OVERVIEW 2 1 2 3 MATERIALS NOT SUPPLIED 2 1 2 3 1 MATERIALS REQUIRED BUT NOT SUPPLIED 2 1 2 4 SPECIAL TOOLS REQUIRED 2 2 2 5 EQUIPMENT MOUNTING 2 2 2 5 1 CABLING AND WIRING 2 2 2 5 2 MOUNTING TRAY INSTALLATION 2 2 2 5 3 UNIT INSERTION REMOVAL 2 7 2 6 ANTENN...

Page 6: ...NG 5 1 5 1 TROUBLESHOOTING PROCEDURE 5 1 5 2 COLLECTING ADDITIONAL INFORMATION 5 2 5 2 1 MESSAGES FOR SERVICE COMMAND 5 2 5 2 2 MESSAGES FOR EXTERNAL COMMAND 5 3 5 3 HOW TO VIEW THE GDL 90 INTERNAL GPS STATUS ON AN MX20 IF EQUIPPED 5 4 5 4 CONTACTING THE FACTORY FOR ASSISTANCE 5 4 6 PERIODIC MAINTENANCE 6 1 6 1 EQUIPMENT CALIBRATION 6 1 6 2 CLEANING 6 1 6 3 BATTERY REPLACEMENT 6 1 6 4 ALTITUDE SOU...

Page 7: ...YSTEM DIAGRAM 1 3 FIGURE 2 1 SINGLE ENGINE AIRCRAFT GDL 90 MOUNTING LOCATIONS 2 3 FIGURE 2 2 MULTI ENGINE AIRCRAFT GDL 90 MOUNTING LOCATIONS 2 4 FIGURE 2 3 GDL 90 MOUNTING TRAY AND DIMENSIONS 2 5 FIGURE 2 4 GDL 90 TRAY AND CONNECTORS 2 6 FIGURE 2 5 GDL 90 TRAY AND OPTIONAL COVER 2 7 FIGURE 2 6 ANTENNA PLACEMENT 2 8 FIGURE 2 7 RIGHT ANGLE COAX CONNECTOR ASSEMBLY 2 10 FIGURE 2 8 REAR CONNECTOR LAYOU...

Page 8: ...Table of Contents vi 560 1049 02 Rev B GDL 90 Installation Manual Notes ...

Page 9: ...ix D Includes Construction Validation of structures 1 1 2 Scope The information in this manual is STC approved Only the equipment interfaces covered in this manual are within the scope of this STC Other equipment may be suitable for use with the GDL 90 but use of such equipment is beyond the scope of this STC additional FAA approval may be required if equipment not covered in this manual is used t...

Page 10: ... Universal Access Transceiver data link radio designed to support ADS B TIS B and FIS B airborne and ground applications GPS WAAS receiver for state of the art fast accurate ADS B position data 15 channel 3 WAAS decoders 5 Hz update of position time and velocity Interface to Altitude Encoder via RS 232 or ARINC 429 buses Interface to a Control Panel or Transponder via RS 232 bus Interface to Garmi...

Page 11: ...r 1 2 2 2 Altitude Encoder The GDL 90 can connect to an altitude encoder to obtain pressure altitude data via an RS 232 or ARINC 429 bus 1 2 2 3 Control Panel The GDL 90 can connect to an optional Control Panel unit such as the GSL 71 or certain models of transponder via an RS 232 bus 1 2 2 4 Annunciator Outputs and Switch Inputs The GDL 90 can drive one external annunciator lamp and receive input...

Page 12: ... Operating temperature 20 C to 55 C Storage temperature 55 C to 85 C Temperature variation 5 C per minute Humidity 95 at 65 C Maximum continuous altitude 55 000 feet Decompression 55 000 feet External Cooling Not required with internal fans operational and vents unobstructed Water resistant With vertical mounting and optional cover 1 3 4 GPS WAAS Receiver Performance TSO Compliance TSO C145a RTCA ...

Page 13: ...hase FSK h 0 6 Raised Cosine shaping a 0 5 Data Rate 1 04 Mbps 99 Power Bandwidth 1 3 MHz 60 dB Bandwidth 3 3 MHz estimated Receiver Sensitivity 96 dBm for 90 MSR 1 3 6 Avionics Interfaces Annunciator Outputs Open collector output capable of sinking up to 400 mA for turning ON annunciator lamp Display RS 422 asynchronous serial RS 232 asynchronous serial ARINC 429 traffic interface Altitude Encode...

Page 14: ...production runs of PN 590 1104 were marked with TSO C129a This antenna was re qualified to TSO C144 with no changes to the antenna P N 590 1104 antennas marked with TSO C129a identification are identical to those marked with TSO C144 Applicable TSO TSO C144 RTCA DO 228 with Change No 1 Frequency 1575 MHz Polarization Right Hand Circular Axial Ratio 3 dB Max at bore site Radiation Coverage Elevatio...

Page 15: ... VSWR 1 7 1 at 978 MHz TSO C66 C74 C112 or C154 antennas that also meet the VSWR specification Table 1 1 Garmin UAT Antennas Antenna Model and Part Numbers Installation Manual Notes A 40 P N 590 0052 P N 560 0253 xx Open Circuit A 41 P N 590 0051 P N 560 0215 xx DC Grounded NOTE Certain types of transponder antennas that utilize very thin radiator elements are only intended for use at 1030 and 109...

Page 16: ...Garmin was granted a deviation from TSO C145a with regard to the GPS Satellite Acquisition Time requirements as stated in RTCA DO 229c paragraph 2 1 1 8 1 3 Garmin was granted a deviation from TSO C145a with regard to the WAAS Satellite Acquisition Time requirements as stated in RTCA DO 229c paragraph 2 1 1 8 2 4 Garmin was granted a deviation from TSO C145a with regard to Satellite Reacquisition ...

Page 17: ...plies normally available at the installation shop such as wire and cable ties circuit breakers and required input and output equipment The items included in the package are listed in Table 1 4 and Table 1 5 In addition Table 1 6 lists optional parts that may be needed for non standard installations The GPS antenna may be provided separately as required for the specific installation Table 1 4 Packa...

Page 18: ... 90 430 6200 000 1 Aircraft Personality Module APM 660 0014 50 Cable coax RG400 dbl shield 50 ohm feet Table 1 6 Optional Parts Part Description 310 0467 xx Capstone Phase 1 Adapter Plate 500 0290 xx Capstone Phase 1 Adapter Cable 560 1057 xx GDL 90 Capstone Upgrade Instructions 1 7 Definitions Acronyms ADC Air Data Computer ADS B Automatic Dependant Surveillance Broadcast AHRS Attitude Heading Re...

Page 19: ...sumption of each GDL 90 mode of operation Document the results of the electrical load analysis on FAA Form 337 The WAAS GPS installation instructions have been prepared to meet the guidance material defined in AC20 138A Airworthiness Approval of Global Navigation Satellite System GNSS Equipment CAUTION Operating the GDL 90 without RF terminations on the Top or Bottom UAT Antenna ports can result i...

Page 20: ...grams in Appendix C for the appropriate wiring Once the cable assemblies have been made attach the cable connectors to the rear of the mounting tray Route the wiring bundle as appropriate Use 22 to 24 AWG wire for all connections except for power Use 20 AWG for power ground Avoid sharp bends 2 5 2 Mounting Tray Installation The GDL 90 does not require forced air cooling however when mounting the G...

Page 21: ...holes provided in the side of the connector plate to provide strain relief for the cable assemblies The cable shields should be grounded directly to a lug mounted to one of the holes on the side of the connector plate keeping the ground leads to a maximum of 3 inches long Prepare the APM wires by stripping the leads and crimping the contacts Do not extend the length of the APM wires Fasten the APM...

Page 22: ...Installation Procedures 2 4 560 1049 02 Rev B GDL 90 Installation Manual UAT Mounting Locations Aft of Baggage Under Seat EE Bay Figure 2 2 Multi Engine Aircraft GDL 90 Mounting Locations ...

Page 23: ...Installation Procedures GDL 90 Installation Manual 560 1049 02 Rev B 2 5 Figure 2 3 GDL 90 Mounting Tray and Dimensions ...

Page 24: ...Figure 2 4 GDL 90 Tray and Connectors CAUTION Operating the GDL 90 without RF terminations on the Top or Bottom UAT Antenna ports can result in equipment damage Always operate the GDL 90 with the Top and Bottom UAT Antenna ports terminated with a VSWR ratio of 3 0 1 or less ...

Page 25: ...ner on the front bottom of the GDL 90 clockwise turn to lock in the unit Do not use the DZUS fastener to draw the unit into the tray If the DZUS fastener is hard to turn or the unit does not seat fully the unit is probably binding Check the position of the unit in the mounting tray To remove the unit from the mounting tray turn the DZUS fastener counter clockwise turn then pull the unit from the t...

Page 26: ...a should be mounted using the following guidelines no closer than two feet from all types of VHF transmitter antennas at least six inches away from other antennas emitting less than 25 watts and at least two feet from higher power antennas See the GPS antenna installation manual for additional guidance The GPS antenna should be mounted such that it will not be shadowed by other nearby antennas or ...

Page 27: ...x The GDL 90 is not approved for installation on aircraft that have SATCOM equipment installed When calculating cable losses include the loss due to each connector or RF adapter typically 0 2 dB used in the GPS antenna cable assembly GPS Splitter If a GPS splitter is used with an existing GPS antenna allow 3 5 dB for each branch of a 2 way splitter Routing and Checkout Once the antenna mounting po...

Page 28: ...SO C66 C74 C112 or C154 and presenting a VSWR of less than 1 7 1 at 978 MHz is acceptable Garmin AT Model A 40 and A 41 antennas meet these requirements and are suitable for use in both fixed wing aircraft and rotorcraft UAT antennas must be mounted more than 0 5 meters from any FADEC Full Authority Digital Engine Control Follow the manufacturer s instructions for installing the antennas The GDL 9...

Page 29: ...WG socket contact P2 I O 162 1577 37 Pin D Sub Receptacle 245 0027 20 24 AWG socket contact N A Maintenance Port 162 1574 9 Pin D Sub Receptacle 245 0027 20 24 AWG socket contact P3 GPS antenna 162 0043 Coax connector right angle N A N A P4 UAT ant top 162 0043 Coax connector right angle N A N A P5 UAT ant bot 162 0043 Coax connector right angle N A N A The following table shows the specifications...

Page 30: ...Installation Procedures 2 12 560 1049 02 Rev B GDL 90 Installation Manual 2 7 1 Interface Connector Definition Figure 2 8 Rear Connector Layout ...

Page 31: ...ower Ground 3 I RS232 RxD1 Maintenance Port Serial Data Input 4 O RS232 TxD1 Maintenance Port Serial Data Output 5 Control Panel Ground Control Panel Serial Ground 6 O APM TxD APM Serial Data Output 7 I APM RxD APM Serial Data Input 8 RESERVED RESERVED 9 I Power Main Aircraft Power Input 10 to 40 VDC 10 Power Ground Main Aircraft Power Ground 11 Maint Serial Ground Maintenance Port Serial Ground 1...

Page 32: ...nel 2A 15 I 429 IN 1A RS232 RxD7 ARINC 429 In Channel 1A RS232 Channel 7 serial data in 16 O 429 OUT 4A ARINC 429 Output Channel 4A 17 O 429 OUT 3A ARINC 429 Output Channel 3A 18 O 429 OUT 2A ARINC 429 Output Channel 2A 19 O 429 OUT 1A ARINC 429 Output Channel 1A 20 O Audio Out Lo Audio signal ground 21 O Suppression Output Suppression Output active high 22 I TCAS Operational In TCAS Operational D...

Page 33: ...tenna ports can result in equipment damage Always operate the GDL 90 with the Top and Bottom UAT Antenna ports terminated with a VSWR ratio of 3 0 1 or less 2 8 2 Micro Aircraft Personality Module APM The GDL 90 stores installation specific configuration information in an aircraft personality module located on the rear of the mounting tray This eliminates the need to set up the configuration again...

Page 34: ...eing transmitted OFF No UAT transmission Rx UAT Receive ON UAT data is being received OFF No UAT reception Maint Maintenance ON GDL 90 needs maintenance check at the earliest convenience OFF No maintenance issue Ext External connections ON One or more external systems have disconnected or failed OFF No external system failure GPS GPS Status Flashing GDL 90 is acquiring GPS position Steady ON GPS p...

Page 35: ... initialization the UAT Fail Out can be configured to behave as follows As UAT Fail Indicator The UAT Fail Out will be grounded when the GDL 90 has detected a system failure This output will be open otherwise This setting is typically used if installed display does not provide UAT failure annunciation and the control panel does not provide a GDL 90 status monitor In this case install an annunciato...

Page 36: ...E The signal provided by the Air Ground Input may be overridden by other system inputs such as ground speed and or radio altitude to guard against switch failure 2 8 5 2 Audio Inhibit In P2 5 Audio Inhibit In The Audio Inhibit In is used to inhibit the GDL 90 audio messages A ground on this input causes GDL 90 audio messages not to be played if this input is open GDL 90 audio messages will be play...

Page 37: ...al UAT control panel or Transponder Altitude Encoder Maintenance PC P1 3 RS232 RxD1 Maintenance PC only P2 15 429 IN 1A RS232 RxD7 P1 4 RS232 TxD1 Maintenance PC only P2 7 Serial Ground 7 P1 11 Serial Ground 1 P1 12 RS232 RxD2 P2 33 429 IN 1B RS232 RxD6 P1 13 RS232 TxD2 P2 24 Serial Ground 6 P1 5 Serial Ground 2 P2 10 RS422 RxD3 P2 28 RS422 RxD3 P2 11 RS422 TxD3 P2 29 RS422 TxD3 NOTE In order for ...

Page 38: ... a GDL 90 installation should start with deciding how RS 232 Port 2 will be used This is because the TxD2 output can only be used for one function at a time and the baud rate used must match that for the RxD2 function RS 232 Data Input Interfaces The GDL 90 can receive altitude data using RS 232 RxD2 RxD6 or RxD7 If RxD2 is used the baud rate must match that used for TxD2 The best flexibility in a...

Page 39: ...1 is not available ARINC 743A Position Time Input Any of the ARINC 429 Input ports may be connected to an ARINC 743A navigation sensor to provide ADS B position data to the GDL 90 When installed in this configuration the GDL 90 s internal WAAS GPS receiver is not used and the GPS antenna need not be installed The GDL 90 uses the following ARINC 743A labels for the transmitted ownship ADS B state v...

Page 40: ... is transmitting and a low signal otherwise If a transponder is installed on the aircraft but the GDL 90 suppression output signal cannot be connected perform a test on the transponder after the installation to determine whether the undesired reply rate exceeds the allowed levels 5 replies per second averaged over a 30 second period for a Mode A C transponder or 1 reply per 10 seconds for a Mode S...

Page 41: ...on 2 Make appropriate entries in the equipment list indicating items added removed or relocated along with the date accomplished Include your name and certificate number in the aircraft records Table 2 6 identifies the weight of the new GDL 90 equipment and Figure 2 9 shows the center of gravity Table 2 6 Unit Weights Item Weight GDL 90 Only 5 2 lbs GDL 90 Mounting Tray 1 0 lbs GDL 90 Mounting Tra...

Page 42: ...Installation Procedures 2 24 560 1049 02 Rev B GDL 90 Installation Manual Figure 2 11 GDL 90 Center of Gravity ...

Page 43: ...aft prior to installation in accordance with AC 43 13 1B Chapter 11 Use the following values for computation Table 2 7 Unit Power Loads 14 VDC 28 VDC GDL 90 Input Typical Max Typical Max GDL 90 Main Power 1 5 A 3 00 A 750mA 1 5 A The following table summarizes the circuit breaker and placard recommendations Table 2 8 Circuit Breaker Size Placard Unit Placard 14 VDC Breaker Size 28 VDC Breaker Size...

Page 44: ...Installation Procedures 2 26 560 1049 02 Rev B GDL 90 Installation Manual Notes ...

Page 45: ...k If such services are desired the GDL 90 installation must be designed such that the flight crew has a single point of entry for the ATC assigned squawk code The following points should be considered If the aircraft is not transponder equipped then an MX20 or GMX 200 display or GSL 71 Control Panel may be configured to provide for squawk code entry See the installation manuals for those products ...

Page 46: ...hile airborne or on the surface Replace the with the appropriate instructions for the particular control unit being used in this installation For example if a transponder is being used as the UAT control unit the instruction would be use the Standby button Check the appropriate box if present in the Flight Manual Supplement to indicate which equipment provides control for the GDL 90 3 2 3 TCAS Int...

Page 47: ...pproved 3 2 8 Traffic Display If the GDL 90 is interfaced to a display that uses the GDL 90 Traffic Alert function such as the GMX 200 the display Pilot s Guide must contain the following information Traffic Alerting is only provided for target aircraft that report an integrity value or containment radius of less than 1 0 nautical miles Traffic position reports are provided for all targets regardl...

Page 48: ...Limitations 560 1049 02 Rev B GDL 90 Installation Manual 3 4 Notes ...

Page 49: ... a PC or terminal to the GDL 90 serial Maintenance port Use the commands as described in the following sections with these port settings 38 400 baud 8 bit data 1 stop bit no parity no flow control 4 2 1 How to Use the GDL 90 Maintenance Port with HyperTerminal 1 Position the aircraft so that it can see the GPS satellites well away from any major structures 2 Connect a computer to the Maintenance P...

Page 50: ...s Arinc n a once off Displays summary of ARINC labels received Cp n a once off Displays data from control panel Discrete View discrete inputs outputs External View status of connected external systems GPS p Monitor GPS status Loader Restarts GDL 90 in data loader mode PlayAudio p Test audio output for p seconds default is 2 Reset Restart the unit RxData p View received message information RxMsg Vi...

Page 51: ...any parameters Use arinc once to display the ARINC labels once and use arinc off to turn off the ARINC label display Example arinc once Labels are listed by interface and label number For labels with multiple counts only the last data is shown Labels received on ARINC 743 interface Label 076 Data 1FFDEE x1 Label 101 Data 000000 x1 Label 102 Data 000000 x1 Label 103 Data 000000 x1 Label 110 Data 00...

Page 52: ...Input Input 6 P2 22 TCAS Op Input Input 7 P2 3 429 Traffic Stby Op Input Input 8 P1 8 reserved Output 1 P2 25 UAT Annunciator Output 2 P2 6 Spare Bidirectional with Input 2 Output 3 P1 15 Spare Output 4 P2 2 reserved Bidirectional with Input 4 Typically discrete inputs and outputs are active in the Ground condition and inactive in the Open condition 4 2 2 8 External Command The external command di...

Page 53: ... 00000000 21 170 19 234 13 00000000 4 148 2 55 13 40008400 25 154 14 305 13 00000000 13 0 2 32 0 4000C000 6 179 50 297 13 00000000 5 183 46 178 13 00000000 0 0 0 0 0 FFFFFFFF 0 0 0 0 0 FFFFFFFF 0 0 0 0 0 FFFFFFFF 10 176 47 117 13 00000000 134 149 13 247 12 00000800 122 144 6 105 13 00000000 0 0 0 0 0 FFFFFFFF When an external ARINC 743A GPS source is used the GPS summary is shown but the individua...

Page 54: ...above the level found using the test tone 4 2 2 12 Reset Command The reset command causes the GDL 90 to perform a software restart This command can be used after modifying the APM settings to restart the GDL 90 and make the new settings active reset 4 2 2 13 Rxdata Command The rxdata command displays information about the received UAT radio messages The command options are shown in the following c...

Page 55: ... errors might indicate weak signal strength and could point toward an antenna or RF connector installation problem Example One Long message received in the previous second with no errors rxmsg Basic Long Ground Blocks 0 errors 0 1 0 1 errors 0 0 0 2 errors 0 0 0 3 errors 0 0 0 4 errors 0 0 0 5 errors 0 0 0 6 errors 0 0 0 7 errors 0 0 0 8 errors 0 0 0 9 errors 0 0 0 10 errors 0 0 0 4 2 2 15 Service...

Page 56: ... I O Board FPGA Rx Logic FPGA PLD Micro APM software Radio controller software and GPS receiver software Example a typical version command response The values given are for example only and may not be the same as the equipment being tested version Version Name Number Airborne SW 02 10 00 GPS Engine SW 1 20 Micro APM SW 01 00 Radio uCont SW 02 00 FPGA Device RX 11 FPGA Device IO 10 Decode PLD 10 ...

Page 57: ...s through the APM initialization script before all the desired settings can be selected We recommend using the APM Worksheet see 4 2 4 to plan the APM settings and installation NOTE The GDL 90 must be restarted after modifying the APM settings before the changes take effect Use the reset command or recycle the power Table 4 3 Data Items for APM initialization Settings Format Description ICAO Addre...

Page 58: ... Enter the length and width wingspan of the aircraft Air Ground Threshold Speed int 0 or 30 100 kts For light aircraft category 1 if Air Ground Indication is not available this threshold speed is used to determine air ground status of aircraft Recommended that this be set to 75 of stall speed For all categories if 0 is entered and Air Ground Indication is not available the aircraft will always rep...

Page 59: ...uses ADC or AHRS port 4 RxD Port 6 5 RxD Port 7 Indicates how GDL 90 obtains altitude information Selection values may be different if RxD Port 2 is unavailable Pressure Altitude baud rate x 0 1200 baud 1 9600 baud Baud rate selection for RxD Port 2 Port 6 and Port 7 Moving Map Output x 0 None 1 TxD Port 2 Use 1 for Moving Map output to traffic display Note this option is not approved for navigati...

Page 60: ...ut the display capability TCAS installation x 0 TCAS not installed 1 TCAS installed without interface to GDL 90 2 TCAS installed with interface to GDL 90 The TCAS interface is not currently approved for use Use 0 if TCAS is not installed on the aircraft Use 1 if TCAS is installed on the aircraft Do not use the 2 setting See Section 3 2 Air Ground Indication x 0 airborne open 1 on ground open 2 not...

Page 61: ...rom aircraft nose to GPS antenna Width offset distance from aircraft center line to GPS antenna SBAS Provider x 0 disabled 1 7 Enables the specified SBAS source When using internal WAAS GPS receiver this setting controls which SBAS Satellite Based Augmentation System sources are used Use 0 to disable SBAS corrections or use 1 for WAAS corrections Settings 2 7 are not approved for use 4 2 4 Micro A...

Page 62: ...Post Installation Configuration and Checkout 560 1049 02 Rev B GDL 90 Installation Manual 4 14 Notes ...

Page 63: ...00 baud 57 600 baud 115 200 baud Ground Uplinks value 0 2 or 4 Control Panel Source None Serial 422 SL70 or GSL 71 GTX 327 or GTX 330 Port opt 2 and 3 only RxD Port 2 RxD Port 6 RxD Port 7 Baud Rate SL70 GSL 71 only 1200 baud 9600 baud Pressure Altitude Source ports depend on configuration None RxD Port 2 Serial 422 Serial 422 ARINC 429 ARINC 429 RxD Port 6 RxD Port 6 RxD Port 7 RxD Port 7 Baud Ra...

Page 64: ... Air Ground Indication Open Airborne Open On ground Not used Audio Volume value 0 to 31 Audio Gnd Test w Ident Disabled Enabled UAT Annunciator 0 if not used or Fail Lamp 1 for GSL 71 Fail Indicator GPS Status Fail Indicator Transmit Only Tx Rx Tx Only UAT Antenna Mode Dual Top only Bottom only Top Antenna Delay value typically use 0 Bottom Antenna Delay value typically use 0 DC grounded antenna N...

Page 65: ...L 90 and allow the unit to acquire a position Turn off all other avionics 3 Verify that the GPS LED on the front of the GDL 90 stops blinking and remains steadily lit within 20 minutes of power on indicating unit has acquired a GPS position 4 Check the position using the gps Maintenance port command The displayed position should agree with a known reference point 5 Turn on other avionics one at a ...

Page 66: ...mands to view the data directly 4 3 1 2 2 Altitude Encoder Verify that the Ext LED on the front of the GDL 90 is not illuminated Use the Maintenance port alt commands to view the data directly 4 3 1 2 3 Display Checkout Refer to the display installation manual for any specific detailed checkout procedures Verify that the Ext LED on the front of the GDL 90 is not illuminated The remainder of this s...

Page 67: ... Enter the cp command on the Maintenance port to display the control panel status and data Operate each control panel input including the squawk code input if enabled and verify the correct values are shown on the cp display Allow 5 seconds for the cp display to update 4 3 1 3 Annunciator Checkout To verify the cockpit UAT annunciator disable one of the GDL 90 interfaces such that the annunciator ...

Page 68: ...______ ARINC 429 Output Configuration _____________ Hi Low Channel 1 Out _____________ Hi Low Channel 2 Out _____________ Hi Low Channel 3 Out _____________ Hi Low Channel 4 Out ANNUNCIATOR OUTPUTS CHECKOUT DISCRETE I O CHECKOUT Use discrete command UAT Fail Annunciator N A Air Ground Switch Input UAT Fail GPS Indicator N A Audio Inhibit Input Annunciator lamp installed N A 429 Traffic Test Input ...

Page 69: ...not connected Verify Ext LED is not lit Your aircraft is not displayed on other aircraft MFD Transmit malfunction Verify that Tx LED on the GDL 90 blinks at least once per second Tx LED is not active flashing at 1 Hz rate Unit is not transmitting UAT messages Verify antennas and cables are properly connected Rx LED is not active Unit is not receiving UAT messages Verify antennas and cables are pro...

Page 70: ...ansmit loopback Comment This indicates a connection problem between the UAT transmitter and receiver Contact the factory MSG 006 Transmit output power failure MSG 007 No PLL lock indication Comment Persistent occurrence of these messages indicates a problem with the internal radio assembly Contact the factory MSG 008 NVRAM battery low Comment The GDL 90 internal battery needs to be replaced Contac...

Page 71: ...ent On the maintenance port enter the command log current for more information on which antenna has failed MSG 062 Control panel is not detected MSG 063 Control panel has failed no heartbeat Comment The Control Panel or its interface to the GDL 90 is not working correctly Check the Control Panel installation and APM configuration MSG 064 No valid data from the Altitude Encoder MSG 065 No valid alt...

Page 72: ...rea or if you are in range of a UAT ground station the Status for the ADS B and FIS items will show activity as well Also on the SYS INFO page in the lower left corner is a box labeled Port Status you should see that Port 4 is labeled as UAT and that the Data column says Yes and the Valid column also says Yes Below the Port 4 status on the line that starts with GDL90 you should see values next to ...

Page 73: ... the Desktop folder that s the easiest place to store a file temporarily 5 In the File Name box type in a file name such as Capture Nxxxx where Nxxxx is the aircraft s tail number 6 Click on Save 7 You are now back at the Capture Text dialog box Click on Start Now all of the data displayed by HyperTerminal will be stored in the file on your computer s Desktop How to Collect GDL 90 Information for ...

Page 74: ...d or the green GPS LED on the GDL 90 front to see if a GPS fix is found When you have collected at least 5 minutes of data end the HyperTerminal data collection as follows At the HyperTerminal menu bar click on Transfer Highlight Capture Text then slide the mouse over and click on Stop HyperTerminal will now give you two warning boxes The first one asks if you want to disconnect Click on Yes The s...

Page 75: ...d within 1 to 2 months If the battery is not replaced and becomes totally discharged the GDL 90 will remain fully operational but the GPS signal acquisition time will be increased There is no loss of function or accuracy of the GDL 90 with a discharged battery The battery is not user replaceable To replace the battery contact the Garmin AT repair station 6 4 Altitude Source The altitude source pro...

Page 76: ...Periodic Maintenance 560 1049 02 Rev B GDL 90 Installation Manual 6 2 Notes ...

Page 77: ...tion 8 S M B Standard vibration Meets without shock mounts Explosion Proofness 9 X not applicable no test required Waterproofness 10 X not applicable no test required Fluids Susceptibility 11 X not applicable no test required Sand and Dust 12 X not applicable no test required Fungus Resistance 13 X not applicable no test required Salt Spray 14 X not applicable no test required Magnetic Effect 15 Z...

Page 78: ...out shock mounts Explosion Proofness 9 X not applicable no test required Waterproofness 10 W Drip proof test Vertical mounting only Fluids Susceptibility 11 X not applicable no test required Sand and Dust 12 X not applicable no test required Fungus Resistance 13 X not applicable no test required Salt Spray 14 S Exposed in Salt Fog for 48 hours Vertical only Magnetic Effect 15 Z 0 3 meter Power Inp...

Page 79: ...ble no test required Waterproofness 10 W Drip proof test Fluids Susceptibility 11 X not applicable no test required Sand and Dust 12 X not applicable no test required Fungus Resistance 13 X not applicable no test required Salt Spray 14 S Exposed in Salt Fog for 48 hours Magnetic Effect 15 Z 0 3 meter Power Input 16 A B 2 for 28 and 14 volt systems Voltage Spike 17 A 2 Audio Frequency Conducted Sus...

Page 80: ...Certification Data A 4 560 1049 02 Rev B GDL 90 Installation Manual Notes ...

Page 81: ...Serial Interface Specifications GDL 90 Installation Manual 560 1049 02 Rev B B 1 APPENDIX B Troubleshooting Flowcharts ...

Page 82: ...Serial Interface Specifications B 2 560 1049 02 Rev B GDL 90 Installation Manual Notes ...

Page 83: ...Serial Interface Specifications GDL 90 Installation Manual 560 1049 02 Rev B B 3 ...

Page 84: ...Serial Interface Specifications B 4 560 1049 02 Rev B GDL 90 Installation Manual ...

Page 85: ...Serial Interface Specifications GDL 90 Installation Manual 560 1049 02 Rev B B 5 ...

Page 86: ...Serial Interface Specifications B 6 560 1049 02 Rev B GDL 90 Installation Manual Notes ...

Page 87: ...Interconnect Diagrams GDL 90 Installation Manual 560 1049 02 Rev B C 1 APPENDIX C Interconnect Diagrams ...

Page 88: ...Interconnect Diagrams C 2 560 1049 02 Rev B GDL 90 Installation Manual Notes ...

Page 89: ...Interconnect Diagrams GDL 90 Installation Manual 560 1049 02 Rev B C 3 Figure C 1 Interconnect Diagram for Installation w Garmin MFD ...

Page 90: ...Interconnect Diagrams C 4 560 1049 02 Rev B GDL 90 Installation Manual Figure C 2 Interconnect Diagram for Control Panel Installations ...

Page 91: ...Interconnect Diagrams GDL 90 Installation Manual 560 1049 02 Rev B C 5 Figure C 3 Interconnect Diagram for Garmin Displays ...

Page 92: ...Interconnect Diagrams C 6 560 1049 02 Rev B GDL 90 Installation Manual This Page Intentionally Left Blank ...

Page 93: ...able D 1 Static Test Load One method of determining the static load capability is as follows 1 Mark and drill the holes where the GDL 90 equipment rack will be mounted 2 Install four 8 32 machine screws MS35206 AN526 or equivalent in the four holes which will be used to mount the GDL 90 equipment rack using washers nuts and nutplates to mount the equipment rack to the mounting surface Note some me...

Page 94: ...anual contact with the fabricated shelf If it is determined that no damage or permanent deformation has occurred the structure is of sufficient strength and the GDL 90 equipment rack may be permanently mounted on it Figure D 1 Upward Static Load Test Figure D 2 Forward Static Load Test ...

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