Garmin GTX 23 ES Installation Manual
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Garmin GTX 23 ES Installation Manual

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GTX 23
Transponder Installation Manual
190-00906-01
August, 2011
Revision A

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Summary of Contents for Garmin GTX 23 ES

  • Page 1 GTX 23 Transponder Installation Manual 190-00906-01 August, 2011 Revision A...
  • Page 2 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...
  • Page 3 State of California to cause cancer, birth defects, or reproductive harm. This Notice is being provided in accordance with California's Proposition 65. If you have any questions or would like additional information, please refer to our web site at www.garmin.com/prop65. WARNING Perchlorate Material – special handling may apply, See www.dtsc.ca.gov./...

  • Page 4: Table Of Contents

    TABLE OF CONTENTS PARAGRAPH PAGE Section 1 GENERAL DESCRIPTION............. 1-1 Introduction ..........................1-1 Equipment Description......................1-1 ADS-B Capabilities........................ 1-1 ADS-B Versions ........................... 1-2 TIS System Capabilities......................1-2 Mutual Suppression Pulses ....................1-2 Interface Summary ......................... 1-3 Technical Specifications ......................1-4 Physical Characteristics ........................
  • Page 5 Performance (Ramp) Test ......................3-4 Continued Airworthiness ....................... 3-4 Section 4 SYSTEM INTERCONNECTS............4-1 Pin Function List ........................4-1 P2301 ............................4-1 Aircraft Power..........................4-2 Discrete Functions........................4-3 Discrete Outputs..........................4-3 Discrete Inputs ..........................4-3 Serial Data Electrical Characteristics..................4-4 RS-232 Input/Output........................
  • Page 6 LIST OF FIGURES FIGURE PAGE Section 1 GENERAL DESCRIPTION............. 1-1 Section 2 INSTALLATION OVERVIEW............2-1 Antenna Installation Considerations ..................2-2 GTX 23 Stand-Alone Rack (115-00629-00)................2-5 GTX 23 Stand-Alone Rack, Suggested Mounting Locations ..........2-5 Section 3 INSTALLATION PROCEDURE ............ 3-1 Section 4 SYSTEM INTERCONNECTS............
  • Page 7 Parts Supplied for a Shield Block Installation (011-01012-01) ..........B-1 Parts not supplied for a Shield Block Installation (Figure B-1)..........B-1 Shielded Cable Preparations for Garmin Connectors ............B-3 Shielded Cable Preparations – (Quick Term) ............... B-9 Appendix C External Interface Drawings (Example Only)......C-1 Appendix D Assembly and Installation Drawings.........
  • Page 8 This page intentionally left blank Page vi GTX 23 Installation Manual Revision A 190-00906-01...

  • Page 9: Section 1 General Description

    GTX 23 Mode S Transponder. 1.2 Equipment Description The Garmin GTX 23 remote-mounted Mode S Transponder is a radio transmitter and receiver that operates on radar frequencies. It receives ground radar and TCAS interrogations at 1030 MHz, and it transmits a coded response of pulses at 1090 MHz. The GTX 23 replies to Mode A, Mode C, and Mode S interrogations.

  • Page 10: Ads-B Versions

    The TIS ground sensor uses real time track reports to generate traffic notification. Traffic display is available to aircraft equipped with a Mode S data link such as the Garmin GTX 23 transponder. Traffic can then be displayed on a Garmin GDU Primary Flight Display, or GNS 400W/ 500W-series unit.

  • Page 11: Interface Summary

    1.6 Interface Summary The GTX 23 provides the following interface connections via the rear connector. See Section 4 and Appendix C for connection details. • External IDENT input • External STBY input (useful for dual transponder installations) • External mutual suppression pulse input/output •...

  • Page 12: Technical Specifications

    1.7 Technical Specifications 1.7.1 Physical Characteristics Characteristic Specification Stand-Alone Rack Width 1.78 Inches (45 mm) Stand-Alone Rack Height 6.92 Inches (176 mm) Stand-Alone Rack Weight 0.9 lbs. (0.41 kg) Depth Including Connectors (measured from front face 11.05 Inches (281 mm) of unit to rear of connector backshells) Depth Including Connectors and Shield Blocks (mea- 11.44 inches (291 mm)

  • Page 13: Power Requirements

    CAUTION The UHF transmitter in this equipment is guaranteed to meet federal communications commission acceptance over the operating temperature range. Modifications not expressly approved by Garmin could invalidate the license and make it unlawful to operate the equipment. 1.9 Certification The conditions and tests required for TSO approval of this article are minimum performance standards.

  • Page 14: Gtx 23 Tso/Etso/Rtca/Icao Compliance

    1.9.1 GTX 23 TSO/ETSO/RTCA/ICAO Compliance Performance Standard Applicable LRU SW Part Function (TSO/ETSO/RTCA/ Category Numbers EUROCAE) Air Traffic Control Radar Beacon System/Mode Select TSO-C112 Class 2A (ATCRBS/MODE S) Airborne Equipment Traffic Information Service RTCA DO-239 (TIS) Air Traffic Control Radar 2C112b Beacon System/Mode Select ETSO-2C112b...

  • Page 15: Tso/Etso Deviations

    1.9.2 TSO/ETSO Deviations TSO/ETSO Deviation 1. Garmin was granted a deviation from TSO-C112 to use RTCA DO-178B instead of RTCA DO-178A. 2. Garmin was granted a deviation from TSO-C112 to use RTCA DO-160D instead of RTCA TSO-C112 DO-160B. 3. Garmin was granted a deviation from TSO-C112 to use RTCA DO-181C instead of RTCA DO-181.

  • Page 16: Section 1 1-1 –

    (iv) damage caused by service performed by anyone who is not an authorized service provider of Garmin; or (v) damage to a product that has been modified or altered without the written permission of Garmin. In addition, Garmin reserves the right to refuse warranty claims against products or services that are obtained and/or used in contravention of the laws of any country.

  • Page 17: Section 2 Installation Overview

    Each of the following accessories is provided separately for the GTX 23 unit. The rack and the remainder of the accessories are required for installation. Item Garmin Catalog Part Number GTX 23 Stand-Alone Install Rack 115-00629-00 Connector Kit, GTX 23...

  • Page 18: Antenna Location Considerations

    Bottom of Aircraft Figure 2-1 Antenna Installation Considerations a. The antenna (Garmin P/N 010-10160-00 or equivalent) should be mounted away from major protrusions, such as engine(s), propeller(s), and antenna masts. It should also be as far as practical from landing gear doors, access doors, or other openings that could shadow (block) the signal between the transponder antenna and ATC radar on TCAS.

  • Page 19: Cabling And Wiring

    2.4 Cabling and Wiring Refer to the interconnect examples in Appendix C for wire gauge guidance. Ensure that routing of the wiring does not come in contact with sources of heat, RF or EMI interference. Check that there is ample space for the cabling and mating connectors. Avoid sharp bends in cabling and routing near aircraft control cables.

  • Page 20: Cable Routing Considerations

    2.4.1 Cable Routing Considerations When routing cables, observe the following precautions: • All cable routing should be kept as short and as direct as practical. • Avoid sharp bends to prevent insulation from being breached. • Avoid routing close to sharp edges to prevent insulation from being breached due to vibration or handling the cable.

  • Page 21: Gtx 23 Stand-Alone Rack (115-00629-00)

    Figure 2-2 GTX 23 Stand-Alone Rack (115-00629-00) Figure 2-3 GTX 23 Stand-Alone Rack, Suggested Mounting Locations GTX 23 Installation Manual Page 2-5 190-00906-01 Revision A...

  • Page 22: Section 2 2-1 –

    This page intentionally left blank Page 2-6 GTX 23 Installation Manual Revision A 190-00906-01...

  • Page 23: Section 3 Installation Procedure

    If the unit is damaged, notify the carrier and file a claim. To justify a claim, save the original shipping container and all packing materials. Do not return the unit to Garmin until the carrier has authorized the claim.

  • Page 24: Backshell Assembly

    615725 M81969/1-04 CAUTION 1. Non-Garmin part numbers shown are not maintained by Garmin and consequently are subject to change without notice. 2. Extracting 18 AWG contacts requires that the expanded wire barrel be cut off from the contact. It may also be necessary to push the pin out from the face of the connector when using an extractor due to the absence of the wire.

  • Page 25: Final Installation

    3.7 Final Installation For final installation and assembly, refer to the outline and installation drawings shown in Appendix D of this manual. a. Assemble the connector backshell as described in Appendix B. b. Attach the connector to the rear plate using the screws provided in the connector kit. c.

  • Page 26: Section 3 3-1 –

    3.8.3 Performance (Ramp) Test CAUTION If the unit is removed from the aircraft and operated, always connect J2302 to an antenna or a 50 Ω, 5-Watt load. The GTX 23 transmits Mode S acquisition squitters about once per second whether interrogations are received or not. The unit may become damaged if J2302 is not connected to a 50 Ω, 5-Watt load when the unit squitters, Installations require verification of proper operation of the transponder by testing as specified in...

  • Page 27: Section 4 System Interconnects

    4 SYSTEM INTERCONNECTS 4.1 Pin Function List 4.1.1 P2301 Figure 4-1 J2301 Connector Pin Name NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED EXTERNAL IDENT SELECT* EXTERNAL STANDBY SELECT* NOT USED NOT USED...

  • Page 28: Aircraft Power

    Connector P2301, continued Pin Name NOT USED ARINC 429 OUT 1 A NOT USED POWER GROUND NOT USED NOT USED AIRCRAFT POWER 1 RS-232 GROUND NOT USED NOT USED TIS CONNECT SELECT* NOT USED NOT USED NOT USED RS-232 GROUND 2 NOT USED NOT USED NOT USED...

  • Page 29: Discrete Functions

    4.2 Discrete Functions 4.2.1 Discrete Outputs External suppression should be connected if a DME or TCAS is installed in the aircraft avionics system. The GTX 23 suppression I/O pulses may not be compatible with all models of DME or TCAS. Known incompatible DME units include the Bendix/King KN 62, KN 64 and KNS 80.

  • Page 30: Serial Data Electrical Characteristics

    4.3 Serial Data Electrical Characteristics 4.3.1 RS-232 Input/Output Pin Name Connector RS-232 OUT 1 P2301 RS-232 GROUND 1 P2301 RS-232 IN 1 P2301 RS-232 OUT 2 P2301 RS-232 IN 2 P2301 RS-232 GROUND 2 P2301 RS-232 input #1 is used to receive pressure altitude control commands. RS-232 output #1 provides unit status and TIS data.

  • Page 31: Rs-232 Input/Output, Software Update Connections

    4.4 RS-232 Input/Output, Software Update Connections GTX 23 software is updated using the RS-232 #1 interface. When wiring the RS-232 #1 interface to the rest of the system, it may be useful to splice in a pigtail connector that could be plugged into a laptop computer.

  • Page 32: Section 4 4-1 –

    This page intentionally left blank Page 4-6 GTX 23 Installation Manual Revision A 190-00906-01...

  • Page 33: Appendix A Construction And Validation Of Structures

    APPENDIX A Construction and Validation of Structures A.1 Static Test Loading This appendix includes information necessary for testing load-carrying capabilities of equipment mounting structures, such as shelves, mounting plates and mounting brackets, used to mount the GTX 23 remote mounting tray. Baggage compartments and cabins or cockpit floors are good mounting platforms providing the floor attachments meet the strength requirements.

  • Page 34: Upward Static Load Test

    7. Examine the support structure carefully. If there has been damage or permanent deformation, the structure is not suitable and must be replaced with one that is strong enough to withstand the test loads. Examine all aircraft stringers, bulkheads and skin surfaces, which may have direct or indirect contact with the fabricated shelf.

  • Page 35: Appendix B Shield Block Installation Instructions

    Appendix B Shield Block Installation Instructions B.1 Shield Block Installation Parts CAUTION Disclaimer: This instruction manual assumes skill and knowledge of aircraft harness fabrication techniques. DO NOT PERFORM THIS INSTALLATION IF YOU ARE UNQUALIFIED Tables B-1 & B-2 list parts needed to install a Shield Block in a D-Sub connector. The Item Numbers listed in Tables B-1 &...

  • Page 36: Shield Block Installation (78 Pin Example)

    NOTE In Figure B-1, “AR” denotes quantity “As Required” for the particular installation. Figure B-1 Shield Block Installation (78 pin example) Page B-2 GTX 23 Installation Manual Revision A 190-00906-01...

  • Page 37: Shield Termination Technique - Method A.1 (Standard

    1. Attach the Shield Block(s) (Item 2) to the backshell (Item 1) by inserting the flathead screws (Item 3) through the holes on the Shield Block and threading into the tapped holes on the backshell (Item 1) (see Figure B-1). Figure B-2 Method A.1 for Shield Termination Table B-3 Shielded Cable Preparations for Garmin Connectors Number Float Float...
  • Page 38 3. Connect a Flat Braid (Item 6) to the shield exposed through the window of the prepared cable assembly (Item 4) from step 2. The Flat Braid should go out the front of the termination towards the connector. It is not permitted to exit the rear of the termination and loop back towards the connector (Figure B-2).

  • Page 39: Insulation/Contact Clearance

    Secondary Method: Solder a Flat Braid (Item 6) to the shield exposed through the window of the prepared cable assembly (Item 4). Ensure a solid electrical connection through the use of acceptable soldering practices. Use care to avoid applying excessive heat that burns through the insulation of the center conductors and shorts the shield to the signal wire.
  • Page 40 6. Insert newly crimped pins and wires into the appropriate connector housing location as specified by the installation wiring diagrams. 7. Cut the Flat Braid (Item 6) to a length that, with the addition of a ring terminal, will reach one of the tapped holes of the Shield Block (Item 2) (Figure B-1).

  • Page 41: Shield Termination Technique - Method A.2 (Daisy Chain

    B.3 Shield Termination Technique - Method A.2 (Daisy Chain) In rare situations where more braids need to be terminated for a connector than three per ring terminal it is allowable to daisy chain a maximum of two shields together before coming to the ring terminal (Figure B-4).

  • Page 42: Method B.1 (Quick Term) For Shield Termination

    At the end of the shielded cable (Item 4), strip “Quick Term Min” to “Quick Term Max” (Table B-4) length of the jacket to expose the shield. Next trim the shield so that at most 0.35 inches remains extending beyond the insulating jacket. Fold this remaining shield back over the jacket. Connect a Flat Braid (Item 6) to the folded back shield of the prepared cable assembly.

  • Page 43: Shield Termination-Method B.2 (Daisy Chain-Quick Term

    Table B-4 Shielded Cable Preparations – (Quick Term) Number of Pins Quick Term Quick Term Quick Term Backshell Size Std/HD Min (inches) Max (inches) Float (inches) 9/15 1.25 2.25 1.75 15/26 25/44 37/62 50/78 B.5 Shield Termination-Method B.2 (Daisy Chain-Quick Term) In rare situations where more braids need to be terminated for a connector than three per ring terminal it is allowable to daisy chain a maximum of two shields together before coming to the ring terminal (Figure B-6).

  • Page 44: Daisy Chain Between Methods A And B

    B.6 Daisy Chain between Methods A and B In rare situations where more braids need to be terminated for a connector than three per ring terminal and a mixture of Methods A and B have been used, it is allowable to daisy chain a maximum of two shields together from a Method A termination to a Method B (Figure B-7).

  • Page 45: D-Sub Spliced Signal Wire Illustration

    Figure B-8 D-Sub Spliced Signal Wire illustration GTX 23 Installation Manual Page B-11 190-00906-01 Revision A...
  • Page 46 This page intentionally left blank Page B-12 GTX 23 Installation Manual Revision A 190-00906-01...

  • Page 47: Appendix C External Interface Drawings (Example Only

    Appendix C - Interconnect Drawings (Example Only) Appendix C External Interface Drawings (Example Only) GTX 23 XPDR CIRCUIT BREAKER P2301 XPDR CIRCUIT BREAKER EXTERNAL IDENT SELECT MUTUAL SUPPRESSION I/O SEE NOTE 3 GSU 73 P731 RS-232 OUT 1 RS-232 IN 3 RS-232 IN 1 RS-232 OUT 3 RS-232 GROUND...

  • Page 48: Ads-B Interconnect Examples

    Appendix C - Interconnect Drawings (Example Only) GTX 23 GNS 430W/530W P2301 P4001/5001 RS-232 IN 2 GPS RS-232 OUT 2 RS-232 GROUND 2 GTX 23 GTN 6XX/7XX P2301 P1001 RS-232 OUT 1 RS-232 IN 2 RS-232 GROUND 1 RS-232 GROUND 2 NOTES: 1.

  • Page 49: Tis Display Options Example

    Following direc ons in the GNS installa on manual, go to the ARINC 429 configura on page. Configure the ARINC input connected to the GTX to: o Speed=High o Format=Garmin GTX 330 Figure C-1.3 TIS Display Options Example GTX 23 Installation Manual – Interconnect Drawings...
  • Page 50 Appendix C - Interconnect Drawings (Example Only) This page intentionally left blank Page C-4 GTX 23 Installation Manual – Interconnect Drawings Revision A 190-00906-01...

  • Page 51: Appendix D Assembly And Installation Drawings

    APPENDIX D Assembly and Installation Drawings 164.9 6.49 175.7 6.92 CENTER OF GRAVITY CENTER OF GRAVITY 246.0 CENTER OF 9.69 GRAVITY 290.0 11.42 48.7 158.8 1.92 6.25 45.3 29.0 1.78 1.14 Figure D-1 GTX 23 Remote Rack/Connector Assembly GTX 23 Installation Manual Page D-1 190-00906-01 Revision A...

  • Page 52: Gtx 23 Connector/Rack Assembly Drawing

    APPENDIX D Assembly and Installation Drawings 115-00629-00 211-60234-08 PART OF 011-00582-XX 330-00053-01 PART OF 011-00582-XX 125-00002-00 PART OF 011-00582-XX 212-00022-00 PART OF 011-00582-XX SUPPLIED WITH 330-00053-01 011-01012-XX 211-63234-11 PART OF 011-01012-XX NOTES: APPLY THREAD LOCKING COMPOUND TO ALL THREADED FASTENERS. RF ADAPTORS (330-00053-01) MUST FLOAT IN CAVITY FOLLOWING ASSEMBLY OF NUT AND WASHER.

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