Garmin GTX 3X5 Installation Manual

GTX 3X5 Transponder

TSO Installation Manual

190-01499-02 February 2016 Revision 4

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190-01499-02 GTX 3X5 Transponder TSO Installation Manual
Rev. 4 Page A

RECORD OF REVISIONS

Revision Revision Date Subject

2 12/14/15 Reorganized manual.

3 2/11/16 Rewrote for clarity. Refer to current revision description.

4 2/26/2016

Added information for vertical remote mount and other minor edits.Refer
to current revision description.

190-01499-02 GTX 3X5 Transponder TSO Installation Manual
Rev. 4 Page B

CURRENT REVISION DESCRIPTION

Section Description

1.8

1.14 Added GPS Boot Block to table 1-12.

3.2 Added vertical remote mount to table 3-1.

3.3 Added vertical remote mount to table 3-2.

3.4.3 Added “GTX 3X5 Vertical Remote Mount” section.

4.7.2 Added “Standard” to heading.

4.7.3 Added “Vertical Remote Mount Units” section.

4.9 Added “Vertical Remote Mount Unit Installation and Removal” section.

Appendix B

Appendix D

Added backplate and updated weights in table 1-3.

Added vertical remote mount characteristics to table 1-4.

Added “GTX 3X5 Vertical Remote Mount” as figure B-5.

Added “GTX 3X5 Vertical Remote Mount Dimensions and CG” as figure B-6.

Updated figure D-3.

Updated note 1 of figure D-10.

Renamed figure D-16 to “Altitude Source Interconnect.”

Added note 6 to figure D-16.

Updated figure D-17.

190-01499-02 GTX 3X5 Transponder TSO Installation Manual
Rev. 4 Page C

INFORMATION SUBJECT TO EXPORT CONTROL LAWS

WARNING

WARNING

NOTE

WARNING

CAUTION

NOTE

This document may contain information which is subject to the Export Administration Regulations (EAR)
issued by the United States Department of Commerce (15 Code of Federal Regulations (CFR), Chapter
VII, Subchapter C) and which may not be exported, released, or disclosed to foreign nationals inside or
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subject to a penalty of up to 10 years imprisonment and a fine of up to $1,000,000 under section 2410 of
the Export Administration Act of 1979. Include this notice with any reproduced portion of this document.

DEFINITIONS OF WARNINGS, CAUTIONS, AND NOTES

A warning means injury or death is possible if the instructions are not
obeyed.

A caution means that damage to the equipment is possible.

A note gives more information.

This product’s packaging and components contain chemicals known to the State of
California to cause cancer, birth defects, or reproductive harm. This notice is provided in
accordance with California's Proposition 65. If you have any questions or would like
additional information, please refer to Garmin’s website, www.garmin.com/prop65

Perchlorate Material – special handling can apply.
Refer to www.dtsc.ca.gov./hazardouswaste/perchlorate

All screen shots used in this document are current at the time of publication. Screen shots
are intended to provide visual reference only. All information depicted in screen shots,
including software file names, versions, and part numbers, are subject to change.

190-01499-02 GTX 3X5 Transponder TSO Installation Manual
Rev. 4 Page i

.

.

TABLE OF CONTENTS

1 S

YSTEM OVERVIEW ........................................................................................................................1-1

1.1 Scope ......................................................................................................................................... 1-2

1.2 Equipment Description.............................................................................................................. 1-3

1.3 Definitions and Abbreviations................................................................................................... 1-4

1.4 ADS-B Capabilities................................................................................................................... 1-6

1.5 FIS-B Capabilities ..................................................................................................................... 1-6

1.6 TIS System Capabilities ............................................................................................................ 1-7

1.7 Interface Summary .................................................................................................................... 1-7

1.8 General Specifications............................................................................................................... 1-8

1.9 Transponder Specifications ..................................................................................................... 1-10

1.10 UAT Receiver Specifications (GTX 345 Only) ...................................................................... 1-10

1.11 1090 MHz Receiver Specifications......................................................................................... 1-11

1.12 GPS Specifications (Units with Internal GPS Only)............................................................... 1-11

1.13 Power Specifications ............................................................................................................... 1-12

1.14 Certification............................................................................................................................. 1-13

1.15 License Requirements ............................................................................................................. 1-16

1.16 Reference Documents.............................................................................................................. 1-17

2 L

IMITATIONS ...................................................................................................................................2-1

2.1 HSDB Packet Forwarding ......................................................................................................... 2-1

2.2 ARINC 429 Data Concentrator Function.................................................................................. 2-1

3 I

NSTALLATION OVERVIEW .............................................................................................................3-1

3.1 Introduction ............................................................................................................................... 3-2

3.2 Unit Configurations................................................................................................................... 3-2

3.3 Accessories Supplied................................................................................................................. 3-3

3.4 Optional Accessories................................................................................................................. 3-5

3.5 Necessary Installation Materials and Accessories Not Supplied .............................................. 3-7

3.6 Necessary Special Tools............................................................................................................ 3-7

3.7 Transponder Antenna ................................................................................................................ 3-8

3.8 GPS Antenna Requirements...................................................................................................... 3-9

3.9 Minimum Systems Configuration ........................................................................................... 3-10

3.10 GTX Input Source Priority ...................................................................................................... 3-11

3.11 GPS/SBAS Parameters............................................................................................................ 3-20

3.12 Antenna Considerations .......................................................................................................... 3-21

3.13 Electrical Bonding................................................................................................................... 3-24

3.14 Cabling and Wiring ................................................................................................................. 3-24

3.15 Electrical Bonding Considerations.......................................................................................... 3-24

3.16 Cooling Requirements and Considerations ............................................................................. 3-24

4 I

NSTALLATION PROCEDURE ...........................................................................................................4-1

4.1 Wire Harness Installation .............................................................................................................4-1

4.2 Backshell Assembly Parts ......................................................................................................... 4-2

4.3 Shielded Cable Preparation ....................................................................................................... 4-3

4.4 Connector and Backshell Assembly.......................................................................................... 4-5

4.5 Configuration Module Installation ............................................................................................ 4-8

4.6 Coax Cable Installation ........................................................................................................... 4-10

4.7 Equipment Rack Installation ................................................................................................... 4-11

190-01499-02 GTX 3X5 Transponder TSO Installation Manual
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TABLE OF CONTENTS CONTINUED

4.8 Panel and Standard Remote Mount Unit Installation and Removal........................................ 4-12

4.9 Vertical Remote Mount Unit Installation and Removal.......................................................... 4-13

5 C

ONNECTOR PINOUT INFORMATION .............................................................................................5-1

5.1 Main Board Connector - P3251................................................................................................. 5-2

5.2 ADS-B Board Connector – P3252 (GTX 345 Only) ................................................................ 5-5

5.3 Power......................................................................................................................................... 5-6

5.4 Lighting Bus .............................................................................................................................. 5-7

5.5 Altitude Inputs........................................................................................................................... 5-7

5.6 Discrete I/O ............................................................................................................................... 5-8

5.7 Serial Data Interfaces ................................................................................................................ 5-9

5.8 Suppression Bus ...................................................................................................................... 5-10

5.9 OAT Input ............................................................................................................................... 5-10

5.10 Audio Output........................................................................................................................... 5-11

5.11 Time Mark............................................................................................................................... 5-11

5.12 Configuration Module ............................................................................................................. 5-11

5.13 USB Interface .......................................................................................................................... 5-12

6 P

OST INSTALLATION CONFIGURATION AND CHECKOUT .............................................................6-1

6.1 System Configuration Overview ............................................................................................... 6-1

6.2 Mounting, Wiring, and Power Checks ...................................................................................... 6-1

6.3 Configuration Mode and Settings.............................................................................................. 6-2

6.4 Audio Settings ........................................................................................................................... 6-3

6.5 Interfaces ................................................................................................................................... 6-5

6.6 Unit Settings ............................................................................................................................ 6-14

6.7 Display Pages .......................................................................................................................... 6-17

6.8 Sensors..................................................................................................................................... 6-20

6.9 ADSB ...................................................................................................................................... 6-25

6.10 Diagnostics .............................................................................................................................. 6-30

6.11 Remote Unit Configuration ..................................................................................................... 6-32

6.12 Ground Check - GPS Reception Check .................................................................................. 6-40

6.13 Software Installation Procedure .............................................................................................. 6-41

7 C
A

ONTINUED AIRWORTHINESS ........................................................................................................7-1

PPENDIX A DATA FORMATS ............................................................................................................. A-1

A.1 RS-232 Air Data Input Format................................................................................................. A-1

A

PPENDIX B GTX 3X5 MECHANICAL DRAWINGS ............................................................................B-1

A

PPENDIX C EQUIPMENT COMPATIBILITY AND CONFIGURATION ..................................................C-1

C.1 ADS-B In Displays................................................................................................................... C-2

C.2 GPS Sources ............................................................................................................................. C-3

C.3 Altitude Sources ....................................................................................................................... C-4

C.4 Audio Panels............................................................................................................................. C-5

C.5 Radar Altimeters....................................................................................................................... C-6

C.6 Heading Reference Sources...................................................................................................... C-6

C.7 Traffic Sensors (GTX 345 Only).............................................................................................. C-8

C.8 Bluetooth .................................................................................................................................. C-9

C.9 Remote Control ........................................................................................................................ C-9

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TABLE OF CONTENTS CONTINUED

C.10 TIS-A Display ........................................................................................................................ C-10

A

PPENDIX D INTERCONNECT DRAWINGS ..............................................................................................D-1

190-01499-02 GTX 3X5 Transponder TSO Installation Manual
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LIST OF FIGURES

Figure 3-1 Air Data Discrete Priority Order........................................................................................3-11

Figure 3-2 Pressure Altitude Priority Order ........................................................................................3-12

Figure 3-3 GPS Locations of Antennas...............................................................................................3-23

Figure 4-1 Shielded Cable Preparation..................................................................................................4-4

Figure 4-2 Shield Termination on Backshell Assembly........................................................................4-6

Figure 4-3 Connector and Backshell Assembly ....................................................................................4-7

Figure 4-4 Configuration Module Installation ......................................................................................4-9

Figure 6-1 Audio Group ........................................................................................................................6-3

Figure 6-2 Audio Page...........................................................................................................................6-4

Figure 6-3 Audio Page 2........................................................................................................................6-4

Figure 6-4 Audio Page 3........................................................................................................................6-4

Figure 6-5 Interface Group....................................................................................................................6-5

Figure 6-6 RS-232 Interface Page .........................................................................................................6-7

Figure 6-7 RS-422 Output Page ............................................................................................................6-8

Figure 6-8 A429 In Page .......................................................................................................................6-9

Figure 6-9 A429 Output Page..............................................................................................................6-10

Figure 6-10 HSDB Interface Page.........................................................................................................6-11

Figure 6-11 Discrete In Page.................................................................................................................6-12

Figure 6-12 Discrete Out Page ..............................................................................................................6-13

Figure 6-13 Unit Group .........................................................................................................................6-14

Figure 6-14 FIS-B Processing Page ......................................................................................................6-14

Figure 6-15 Altitude and Temperature Units Page................................................................................6-15

Figure 6-16 Installation and VFR ID Page............................................................................................6-15

Figure 6-17 Altitude Alert Deviation and Restore Page .......................................................................6-16

Figure 6-18 Bluetooth Page...................................................................................................................6-16

Figure 6-19 Display Group....................................................................................................................6-17

Figure 6-20 Display Pages.....................................................................................................................6-18

Figure 6-21 Sensor Group .....................................................................................................................6-20

Figure 6-22 Sensor Page........................................................................................................................6-21

Figure 6-23 Altitude Source Page .........................................................................................................6-21

Figure 6-24 Source, Integrity, and Offset Page.....................................................................................6-23

Figure 6-25 Internal Alt Encoder Page..................................................................................................6-23

Figure 6-26 Internal Alt Encoder Adjustment Page ..............................................................................6-23

Figure 6-27 Setting the Yaw Angle.......................................................................................................6-24

Figure 6-28 Internal AHRS Orientation Page .......................................................................................6-24

Figure 6-29 ADS-B Group ....................................................................................................................6-25

Figure 6-30 Aircraft Category and Max Airspeed Page........................................................................6-26

Figure 6-31 Aircraft Length and Width Page........................................................................................6-27

Figure 6-32 1090ES Out Control and UAT Out Remote Control Page................................................6-27

Figure 6-33 1090ES In Capable and UAT In Capable Page .................................................................6-27

Figure 6-34 ADS-B In Processing Page...........................................................................................

Figure 6-35 Aircraft Tail Number and Address Page ...........................................................................6-28

Figure 6-36 Allow Pilot to Edit Flight ID Page ....................................................................................6-28

Figure 6-37 Default Flight ID and Flight ID Prefix Page .....................................................................6-29

Figure 6-38 Diagnostics Group .............................................................................................................6-30

Figure 6-39 Diagnostics Page................................................................................................................6-31

Figure 6-40 USB-A and USB-B Connectors.........................................................................................6-32

Figure 6-41 Aircraft Configuration Page .............................................................................................6-33

.....6-28

190-01499-02 GTX 3X5 Transponder TSO Installation Manual
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LIST OF FIGURES CONTINUED

Figure 6-42 Airframe Configuration Page ............................................................................................6-33

Figure 6-43 Unit Configuration Page ....................................................................................................6-34

Figure 6-44 Interface Configuration Page - Serial ................................................................................6-34

Figure 6-45 Interface Configuration Page - A429.................................................................................6-35

Figure 6-46 Interface Configuration Page - Discretes...........................................................................6-35

Figure 6-47 Interface Configuration Page - HSDB...............................................................................6-36

Figure 6-48 Sensors Configuration Page - GAE ...................................................................................6-36

Figure 6-49 Sensors Configuration Page - GPS....................................................................................6-37

Figure 6-50 Sensors Configuration Page - Internal AHRS ...................................................................6-37

Figure 6-51 Sensors Configuration Page - Additional Sensors.............................................................6-38

Figure 6-52 Audio Configuration Page .................................................................................................6-38

Figure 6-53 Display Configuration Page - Panel Mount Units Only....................................................6-39

Figure 6-54 Software Upload Page .......................................................................................................6-41

Figure B-1 GTX 345 GPS Panel Mount Assembly Shown ..................................................................B-2

Figure B-2 GTX 345 GPS Panel Mount Dimensions and CG Shown.................................................. B-3

Figure B-3 GTX 345R GPS Standard Remote Mount Assembly Shown............................................. B-4

Figure B-4 GTX 345R GPS Standard Remote Mount Dimensions and CG Shown ............................ B-5

Figure B-5 GTX 3X5 Vertical Remote Mount ..................................................................................... B-6

Figure B-6 GTX 3X5 Vertical Remote Mount Dimensions and CG....................................................B-7

Figure B-7 G1000 Mount Rack Assembly with GTX 345R GPS Shown ............................................ B-8

Figure B-8 G1000 Mounting Rack Dimensions and CG with GTX 345R GPS Shown....................... B-9

Figure B-9 GTX 3X5 Panel Cutout Detail..........................................................................................B-10

Figure B-10 GTX 3X5 Connector and Vent Locations ........................................................................ B-11

Figure B-11 Optional Garmin Altitude Encoder...................................................................................B-11

Figure D-1 GTX 3X5 Power Configuration Typical Interconnect .......................................................D-3

Figure D-2 GTX 345 - Legacy G1000 Interconnect .............................................................................D-5

Figure D-3 GTX 335 - Legacy G1000 Interconnect .............................................................................D-7

Figure D-4 GTX 3X5 - GNS 480 (CNX80) Interconnect.....................................................................D-8

Figure D-5 GTX 335 - GTN 6XX/7XX Typical Interconnect..............................................................D-9

Figure D-6 Single/Dual GTX 335 - Single GTN 6XX/7XX Interconnect..........................................D-11

Figure D-7 GTX 345 - GTN 6XX/7XX Typical Interconnect............................................................D-12

Figure D-8 GTX 345 - Single/Dual GTN 6XX/7XX Interconnect.....................................................D-14

Figure D-9 GTX 335/345 - GDL 88 Interconnect ..............................................................................D-16

Figure D-10 GTX 345 - Traffic Sensor Interconnect............................................................................D-17

Figure D-11 GTX 345 - Single and Dual 400W/500W Series..............................................................D-18

Figure D-12 GTX 3X5 - Audio Interconnect ........................................................................................D-19

Figure D-13 GTX 3X5 - Radio Altimeter Interconnect ........................................................................D-20

Figure D-14 GTX 3X5 - AHRS/Heading Source .................................................................................D-21

Figure D-15 GTX 3X5 - Switches and OAT Probe Interconnect .........................................................D-22

Figure D-16 GTX 3X5 - Altitude Source Interconnect.........................................................................D-23

Figure D-17 GTX 335 - GNS 400W/500W Series Interconnect ..........................................................D-25

Figure D-18 GTX 345/345R - Flight Stream Interconnect ...................................................................D-26

Figure D-19 GTX 345 - MX20/GMX 200 Interconnect .......................................................................D-26

Figure D-20 GTX 335 - GDU 620 Interconnect ...................................................................................D-27

190-01499-02 GTX 3X5 Transponder TSO Installation Manual
Rev. 4 Page vi

LIST OF TABLES

Table 1-1 GTX 3X5 Units.......................................................................................................................1-3

Table 1-2 Interface Summary..................................................................................................................1-7

Table 1-3 Physical Characteristics - Panel Mount Units.........................................................................1-8

Table 1-4 Physical Characteristics - Remote Mount Units .....................................................................1-9

Table 1-5 Display Specifications...........................................................................................................1-10

Table 1-6 Transponder Specifications...................................................................................................1-10

Table 1-7 UAT Receiver Specifications ................................................................................................1-10

Table 1-8 1090 MHz Receiver Specifications.......................................................................................1-11

Table 1-9 GPS Receiver Specifications ................................................................................................1-11

Table 1-10 Power Specifications.............................................................................................................1-12

Table 1-11 TSO Compliance...................................................................................................................1-13

Table 1-12 Applicable P/Ns ....................................................................................................................1-14

Table 1-13 TSO/ETSO Deviations..........................................................................................................1-14

Table 1-14 Software Design Assurance Levels.......................................................................................1-15

Table 1-15 Complex Hardware Design Assurance Levels......................................................................1-16

Table 1-16 Equipment Authorization......................................................................................................1-16

Table 1-17 Garmin Reference Documents..............................................................................................1-17

Table 1-18 Additional Reference Documents .........................................................................................1-17

Table 3-1 GTX 3X5 Configurations........................................................................................................3-2

Table 3-2 Accessories Supplied ..............................................................................................................3-3

Table 3-3 Pressure Sensor Module..........................................................................................................3-5

Table 3-4 GX000 System Rack...............................................................................................................3-5

Table 3-5 GTX 3X5 Vertical Remote Mount Kits ..................................................................................3-5

Table 3-6 Recommended Crimp Tools....................................................................................................3-7

Table 3-7 Acceptable UAT/1090 Antennas.............................................................................................3-8

Table 3-8 GNSS Receiver Antennas .......................................................................................................3-9

Table 3-9 Minimum System Configuration ..........................................................................................3-10

Table 3-10 Compatible ADS-B Traffic/FIS-B Displays .........................................................................3-10

Table 3-11 Air Data Select Source Priority.............................................................................................3-12

Table 3-12 Barometric Vertical Rate Source Priority..............................................................................3-13

Table 3-13 Indicated Airspeed Source Priority .......................................................................................3-13

Table 3-14 True Airspeed Source Priority...............................................................................................3-13

Table 3-15 Barometric Pressure Setting Source Priority ........................................................................3-14

Table 3-16 MCP/FCU Selected Altitude Source Priority........................................................................3-14

Table 3-17 Magnetic Heading Source Priority........................................................................................3-15

Table 3-18 True Heading Source Priority ...............................................................................................3-15

Table 3-19 Static Air Temperature Source Priority.................................................................................3-15

Table 3-20 Total Air Temperature Source Priority ..................................................................................3-16

Table 3-21 Pressure Altitude Source Selection #1 ..................................................................................3-16

Table 3-22 Pressure Altitude Source Priority Order #1...........................................................................3-16

Table 3-23 Pressure Altitude Source Priority Order #1...........................................................................3-17

Table 3-24 Baro-Corrected Altitude Source Selection #1.......................................................................3-17

Table 3-25 Baro-Corrected Altitude Source Priority Order #1 ...............................................................3-17

Table 3-26 Baro-Corrected Altitude Source Priority Order #2 ...............................................................3-17

Table 3-27 AHRS Source Priority...........................................................................................................3-18

Table 3-28 Airport Reference Points Source Priority .............................................................................3-18

Table 3-29 Density Altitude Source Priority...........................................................................................3-18

Table 3-30 Height Above Terrain Source Priority...................................................................................3-18

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LIST OF TABLES CONTINUED

Table 3-31 Radio Altitude Source Priority..............................................................................................3-19

Table 3-32 Selected Course and Joystick Waypoint Source Priority ......................................................3-19

Table 3-33 FMS Selected Altitude Priority.............................................................................................3-19

Table 3-34 Magnetic Variation Source Priority.......................................................................................3-19

Table 4-1 Backshell Assembly................................................................................................................4-2

Table 4-2 Configuration Module Kit, P/N 011-00979-03.......................................................................4-9

Table 5-1 P3251 Connector.....................................................................................................................5-2

Table 5-2 P3252 Connector.....................................................................................................................5-5

Table 5-3 Power Pins...............................................................................................................................5-6

Table 5-4 Power Configuration and Control Inputs................................................................................5-6

Table 5-5 Power Configuration and Power Control Functions...............................................................5-7

Table 5-6 Lighting Bus Pins....................................................................................................................5-7

Table 5-7 Altitude Inputs.........................................................................................................................5-8

Table 5-8 Discrete Inputs and Outputs....................................................................................................5-8

Table 5-9 RS-232 Inputs and Outputs.....................................................................................................5-9

Table 5-10 ARINC 429 Inputs and Outputs..............................................................................................5-9

Table 5-11 Ethernet Inputs and Outputs..................................................................................................5-10

Table 5-12 RS-422 Outputs.....................................................................................................................5-10

Table 5-13 External Suppression Bus Pin...............................................................................................5-10

Table 5-14 OAT Input and Output...........................................................................................................5-10

Table 5-15 Audio Inputs and Outputs .....................................................................................................5-11

Table 5-16 Time Mark Outputs...............................................................................................................5-11

Table 5-17 Configuration Module Inputs and Outputs ...........................................................................5-11

Table 5-18 USB Inputs and Outputs .......................................................................................................5-12

Table 6-1 RS-232 Channel 1 through Channel 3 Selections...................................................................6-6

Table 6-2 RS-232 Channel 4 Selections..................................................................................................6-7

Table 6-3 RS-422 Selections...................................................................................................................6-8

Table 6-4 ARINC 429 Inputs ..................................................................................................................6-9

Table 6-5 ARINC 429 Outputs..............................................................................................................6-10

Table 6-6 HSDB Formats......................................................................................................................6-11

Table 6-7 Discrete Inputs ......................................................................................................................6-12

Table 6-8 Discrete Outputs....................................................................................................................6-13

Table C-1 ADS-B In Display..................................................................................................................C-2

Table C-2 GPS Source ............................................................................................................................ C-3

Table C-3 Altitude Sources..................................................................................................................... C-4

Table C-4 Audio Panels .......................................................................................................................... C-5

Table C-5 Radar Altimeters .................................................................................................................... C-6

Table C-6 Heading Reference Source..................................................................................................... C-6

Table C-7 Traffic Sensors .......................................................................................................................C-8

Table C-8 Bluetooth................................................................................................................................C-9

Table C-9 Remote Control ...................................................................................................................... C-9

Table C-10 TIS-A Displays.....................................................................................................................C-10

190-01499-02 GTX 3X5 Transponder TSO Installation Manual
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1 SYSTEM OVERVIEW

1.1 Scope ................................................................................................................................................1-2

1.2 Equipment Description ....................................................................................................................1-3

1.3 Definitions and Abbreviations .........................................................................................................1-4

1.4 ADS-B Capabilities .........................................................................................................................1-6

1.4.1 ADS-B Out ............................................................................................................................ 1-6

1.4.2 ADS-B In .............................................................................................................................. 1-6

1.4.3 Installation Approval for ADS-B Systems ............................................................................ 1-6

1.5 FIS-B Capabilities ............................................................................................................................1-6

1.6 TIS System Capabilities ...................................................................................................................1-7

1.7 Interface Summary ...........................................................................................................................1-7

1.8 General Specifications .....................................................................................................................1-8

1.9 Transponder Specifications ............................................................................................................1-10

1.10 UAT Receiver Specifications (GTX 345 Only) ............................................................................1-10

1.11 1090 MHz Receiver Specifications ...............................................................................................1-11

1.12 GPS Specifications (Units with Internal GPS Only) .....................................................................1-11

1.13 Power Specifications ......................................................................................................................1-12

1.14 Certification ...................................................................................................................................1-13

1.14.1 Non-TSO Functions ............................................................................................................ 1-15

1.14.2 Design Assurance Levels .................................................................................................... 1-15

1.14.3 Transmitter Grant of Equipment Authorization .................................................................. 1-16

1.15 License Requirements ....................................................................................................................1-16

1.16 Reference Documents ....................................................................................................................1-17

190-01499-02 GTX 3X5 Transponder TSO Installation Manual
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1.1 Scope

NOTE

Garmin recommends installation of the GTX 3X5 by a Garmin–authorized installer.
Garmin will not be liable for damages that result fr om improper or negligent installation
of the GTX 3X5 to the extent permitted by law. Contact Garmin Aviation Product Support
at [phone] for questions.

This manual gives mechanical and electrical information to install the GTX 3X5 into an aircraft. It is not
equivalent to an approved airframe-specific maintenance manual, installation design drawing, or
installation data package. The content of this manual assumes use by competent and qualified avionics
engineering personnel and/or avionics installation specialist using standard maintenance procedures in
accordance with Title 14 of the Code of Federal Regulation and other related accepted procedures.

190-01499-02 GTX 3X5 Transponder TSO Installation Manual
Rev. 4 Page 1-2

1.2 Equipment Description

The GTX 3X5 models include Mode S/ES transponders. Mode S/ES models have an optional internal GPS/SBAS receiver. Model names with an R indicate remote
mount units. These units do not include a display or keypad.

Table 1-1 GTX 3X5 Units

Feature

Mode S/ES X X X X X X X X X

External ADS-B control X X X X X

ARINC 429 data concentrator X X X X X X X X X

ADS-B In with alerting
(UAT and 1090 MHz)

Connext (via Bluetooth) X X X X

FIS-B X X X X

TIS traffic X X X X X

ADS-B In and TAS/TCAS traffic
integration

HSDB forwarding X X X X

Pressure sensor module
(optional)

Flight timers X X X X X

Audio output X X X X X X X X X

GTX 335

X X X X X X X X X

GTX 335 NVGTX 335

w/ GPS

GTX 335R

GTX 335R

w/GPS

GTX 345

X X X X

X X X X

GTX 345

w/GPS

GTX 345R

GTX 345R

w/ GPS

Interface to Garmin display
products

Shows pressure altitude, outside
air temperature, and density
altitude

Night vision goggle compatibility X

Altitude monitor X X X X X

X X X X X X X X X

X X X X X

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1.3 Definitions and Abbreviations

Definitions

References made to GTX 3X5 apply to all GTX 3X5 models, except when noted.

The term squitter refers to a burst or broadcast of aircraft-tracking data that is periodically transmittedby a
Mode S transponder without radar interrogation. The GTX 3X5 Mode S/ES models transmit
ADS-B Out ES. These transmissions contain additional aircraft information that includes GPS based
location information.

Abbreviations

These abbreviations and acronyms are used in this document.

AC Advisory Circular
ADF Automatic Direction Finder
ADS-B Automatic Dependent Surveillance-Broadcast
ADS-R Automatic Dependent Surveillance-Rebroadcast
AFMS Aircraft Flight Manual Supplement
AIRMET Airmen Meteorological Information
API Appliance Project Identifier
CDTI Cockpit Display of Traffic Information
ATCRBS Air Traffic Control Radar Beacon System
CFR Code of Federal Regulations
CG Center of Gravity
CONUS Continental United States
CSA Conflict Situational Awareness
DC Direct Current
DME Distance Measuring Equipment
EQF Environmental Qualification Form
ES Extended Squitter
FAA Federal Aviation Administration
FCC Federal Communications Commission
FCU Flight Control Unit
FIS-B Flight Information Services-Broadcast
FMS Flight Manual Supplement
GAE Garmin Altitude Encoder
GNSS Global Navigation Satellite System
GPS Global Positioning System
GTX Garmin Transponder
HSDB High Speed Data Bus
LAT Latitude
LON Longitude
MCP Mode Control Panel
METAR Meteorological Aviation Report
MFD Multifunction Display
MSR Message Success Rate
NOTAM Notice to Airmen
NEXRAD Next Generation Radar

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OAT Outside Air Temperature
PED Portable Electronic Device
PIREP Pilot Weather Report
POH Pilot Operating Handbook
RAIM Receiver Autonomous Integrity Monitoring
RFMS Rotorcraft Flight Manual Supplement
SATCOM Satellite Communications
SBAS Satellite-Based Augmentation System
SIGMET Significant Meteorological Information
SIL Source Integrity Level
SPI Special Position Indicator
SUA Special Use Airspace
TAF Terminal Area Forecast
TAS Traffic Advisory System
TCAS Traffic Collision Avoidance System
TIS Traffic Information Service
TIS-B Traffic Information Service-Broadcast
TSO Technical Standard Order
UAT Universal Access Transceiver
UHF Ultra-High Frequency
USB Universal Serial Bus
VHF Very High Frequency
VSWR Voltage Standing Wave Ratio
WAAS Wide Area Augmentation System

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1.4 ADS-B Capabilities

1.4.1 ADS-B Out

The GTX 335 and GTX 345 include ADS-B Out capabilities when installed with an approved internal or
external GPS position source.

1.4.2 ADS-B In

The GTX 345 includes receivers for both the UAT and the 1090 MHz frequency bands for all ADS-B In
data reception capabilities. The GTX 345 receives ADS-B transmissions from other ADS-B Out equipped
aircraft, ADS-R, and TIS-B information from ground stations. Traffic information received from ADS-B,
ADS-R, and TIS-B transmissions supplies compatible ADS-B In data to CDTIs to show the pilot.

1.4.3 Installation Approval for ADS-B Systems

The conditions and tests necessary for TSO approval of the GTX 3X5 are minimum performance
standards. It is the responsibility of the installer to determine if the aircraft installation conditions are
within the TSO standards. TSO units must have separate approval to install in an aircraft. The GTX 3X5
can be installed only in compliance with 14 CFR Part 43 or the applicable airworthiness requirements.

All GTX 3X5 unit functions are design-approved under the TSO. Changes or modifications to any unit that
are not approved can void the compliance to necessary regulations and authorization for continued
equipment usage.

It is the installer’s responsibility to make sure the ADS-B Out system installation is compliant with
14 CFR 91.227 and to make sure compatibility between the GTX 3X5 and the ADS-B Out equipment.

Refer to Garmin ADS-B Out Compatible Equipment, for compatible equipment that is applicable for

14 CFR 91.227-compliant installations in accordance with AC 20-165A. FIS-B information is for pilot­planning and pilot near-term decisions. The information shown are areas of inclement weather that are out
of visual range or are not easily seen.

1.5 FIS-B Capabilities

The GTX 345 receives FIS-B information from UAT ground stations in the United States. A direct line-of­sight between the ground station and aircraft is necessary to receive FIS-B data. The data is not available at
ground level in some locations. The GTX 345 supplies the data to compatible displays. Depending on the
CDTI it can show:

• NOTAM (includes TFRs)

•AIRMET

•SIGMET

•SUA

•METAR

•TAFs

•PIREP

• Winds/Temps Aloft

• Regional NEXRAD

• CONUS NEXRAD

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1.6 TIS System Capabilities

The GTX 335 supplies information about nearby traffic through the FAA provided radar based TIS.
Advisory traffic information is shown on a compatible Garmin display. Garmin units capable to show TIS
traffic include:

• GNS 480 (CNX80)

• GTN 6XX/7XX

•GMX 200

•MX20 MFD

• GNS 400W/500W Series

• GDU 620

• GDU 1040

1.7 Interface Summary

Table 1-2 Interface Summary

Interface Description Input/Output

RS-232 I/O 3 4

ARINC 429

HSDB I/O N/A 2

RS-422 I or O N/A 1

Discrete I/O

Gray code altitude input [3] I [3] 1 1

Suppression bus I/O 1 1

1PPS O 1 1

OAT input I 1 1

Audio output O 1 1

Configuration module, GAE module interface [2] I/O 1 1

USB interface I/O 1 1

Lighting bus input I 1 1

Switched power output O 1 1

O 1 1

I 2 2

I [3] 15 15

O 1 1

I/O [1] 2 4

GTX 335

Qty

GTX 345

Qty

Notes:

[1] Can be configured to be either input or output on a per-discrete basis.

[2] Use for either the configuration module or combination configuration module/GAE.

[3] The Gray code altitude input pins can be used for other functions when not used for Gray

code.

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1.8 General Specifications

It is the responsibility of the installer to get the latest revision of the GTX 3X5 EQF. Refer to Garmin’s

Dealer Resource Center

Bezel height 1.65 in. (42 mm)

Bezel width 6.25 in. (159 mm)

Rack height (dimple to dimple) 1.68 in. (43 mm)

Rack width 6.30 in. (160 mm)

Depth behind panel with connectors (measured from face of aircraft
panel to rear of connector backshells)

GTX 335 weight (unit only) 2.0 lbs (0.91 kg)

GTX 335 with GPS weight (unit only) 2.1 lbs (0.95 kg)

GTX 345 weight (unit only) 2.3 lbs (1.04 kg)

GTX 345 with GPS weight (unit only) 2.4 lbs (1.10 kg)

GTX 335 with rack, backplate, and connectors 2.8 lbs (1.27 kg)

GTX 335 with GPS with rack, backplate, and connectors 2.9 lbs (1.32 kg)

GTX 345 with rack, backplate, and connectors 3.1 lbs (1.41 kg)

GTX 345 with GPS with rack, backplate, and connectors 3.2 lbs (1.45 kg)

Operating temperature range

Maximum operating altitude 55,000 feet

Humidity 95% non-condensing

Cooling External cooling not necessary

Audio output 100 mW into 500 ohm

to get a copy of the EQF, P/N 005-00752-02.

Table 1-3 Physical Characteristics - Panel Mount Units

Characteristic Specification

10.07 inches (256 mm)

-49°F to 131°F (-45°C to +70°C)

Refer to the EQF for additional
details.

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Table 1-4 Physical Characteristics - Remote Mount Units

Characteristic Specification

Height, standard mount 1.7 inches (43 mm)

Width, standard mount 6.3 inches (160 mm)

Length, standard mount (unit, mount, and connector backshells) 9.9 inches (252 mm)

Height, unit and vertical remote mount 6.6 inches (167 mm)

Width, unit and vertical remote mount 1.8 inches (46 mm)

Length, unit and vertical remote mount (unit, mount, connector
backshell(s))

GTX 335R weight (unit only) 1.7 lb (0.77 kg)

GTX 335R with GPS weight (unit only) 1.8 lb (0.82 kg)

GTX 345R weight (unit only) 2.0 lb (0.91 kg)

GTX 345R with GPS (unit only) 2.2 lb (1.00 kg)

GTX 335R weight with standard mounting tray, backplate, and
connectors

GTX 335R with GPS weight withstandard mounting tray, backplate,
and connectors

GTX 345R weight with standard mounting tray, backplate, and
connectors

GTX 345R with GPS with standard mounting tray, backplate, and
connectors

GTX 335R weight with vertical remote mount, backplate, and
connectors

GTX 335R with GPS weight with vertical remote mount, backplate,
and connectors

GTX 345R weight with vertical remote mount, connector backplate,
and connectors

GTX 345 with GPS weight with vertical remote mount, connector
backplate, and connectors

Operating temperature range

Maximum operating altitude 55,000 feet

Humidity 95% non-condensing

Cooling External cooling not necessary

Audio output 100 mW into 500 ohm

12.7 inches (321 mm)

2.5 lb (1.13 kg)

2.7 lb (1.22 kg)

2.9 lb (1.32 kg)

3.0 lb (1.36 kg)

3.0 lb (1.35 kg)

3.1 lb (1.42 kg)

3.3 lb (1.51 kg)

3.5 lb (1.57 kg)

-49°F to 131°F (-45°C to + 70°C)

For more details refer to the EQF.

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The GTX 3X5 display is a sunlight readable LCD display.

Table 1-5 Display Specifications

Characteristic Specification

Display size

Active area

Resolution 200 x 33 pixels

Viewing angle

Width: 3.46 inches (87.88 mm)

Height: 0.843 inches (21.4 mm)

Width: 2.95 inches (74.98 mm)

Height: 0.486 inches (12.36 mm)

Left: 45°

Right: 45°

From top: 30°

From bottom: 10°

1.9 T ransponder Specifications

Table 1-6 Transponder Specifications

Characteristic Specification

Transmitter frequency 1090 MHz ± 1 MHz

Transmitter power

Receiver frequency

Receiver sensitivity

External suppression input

External suppression output

125 W min at antenna, with max 2dB cable loss

250 W nominal at unit

1030 MHz + 0.01 MHz

-74 dBm nominal for 90% replies

≥ 10 VDC to suppress

≥ 18 VDC with 300 ohm load, 28 VDC typical with no

load

1.10 UAT Receiver Specifications (GTX 345 Only)

Table 1-7 UAT Receiver Specifications

Characteristic Specification

Frequency 978 MHz +

Modulation Continuous phase FSK, h = 0.6, raised cosine shaping, a = 0.5

Data rate 1.04 Mbps

Sensitivity -96 dBm for 90% MSR

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20 ppm

1.1 1 1090 MHz Receiver Specifications

Table 1-8 1090 MHz Receiver Specifications

Characteristic Specification

Frequency 1090 MHz +

Modulation Binary pulse-position

Data rate 1 Mbps

Sensitivity -81 dBm for 90% MSR

1 MHz

1.12 GPS Specifications (Units with Internal GPS Only)

Table 1-9 GPS Receiver Specifications

Characteristic Specification

Number of channels 15 (12 GPS and 3 GPS/SBAS)

Frequency 1575.42 MHz L1, C/A code

Sensitivity (acquisition, no interference)

Sensitivity (drop lock) -144 dBm

Dynamic range >20 dB

LAT/LON position accuracy <1.25 meter RMS horizontal, <2 meter vertical, with SBAS

Velocity 1000 knots maximum (above 60,000 ft)

TTFF (Time To First Fix) 1:45 min. typical with current almanac, position, and time

Reacquisition 10 seconds typical

Position update interval 0.2 sec (5 Hz)

1PPS (Pulse Per Second) ± 275 nsec of UTC second

Datum WGS-84

SATCOM compatibility SATCOM compatibility is dependent on antenna selection

Antenna power supply 35 mA typical, 40 mA max at 4.7 VDC

-134.5 dBm GPS

-135.5 dBm SBAS

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1.13 Power Specifications

GTX 3X5 units require an input voltage of between 9 VDC and 33 VDC. The maximum input power and
current is based upon maximum reply rates. Input power and current does not include the switched power
output.

Table 1-10 Power Specifications

Unit Characteristic

Power input 8 W typical, 15 W maximum

GTX 335

GTX 335, GPS

GTX 345

GTX 345, GPS

GTX 3X5, GPS [1]

Input current, typical 0.57 A 0.29 A

Input current, maximum 0.86 A 0.43 A

Power input 10 W typical, 17 W maximum

Input current, typical 0.72 A 0.36 A

Input current, maximum 1.22 A 0.61 A

Power input 10 W typical, 18 W maximum

Input current, typical 0.72 A 0.36 A

Input current, maximum 1.30 A 0.65 A

Power input 12 W typical, 20 W maximum

Input current, typical 1.07 A 0.54 A

Input current, maximum 1.43 A 0.72 A

KEEP ALIVE input current, typical 65 uA 20 uA

KEEP ALIVE input current, maximum 85 uA 40 uA

Notes:

[1] KEEP ALIVE input only applies to units that have an internal GPS.

Specification

14 VDC 28 VDC

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1.14 Certification

The GTX 3X5 meets compliance with the TSO(s) when interfaced with equipment and installed in
accordance with the requirements and limitations as outlined in this manual.

FIS-B information, including weather information, NOTAMs, and TFR areas, are intended to assist in
long- and near-term planning decision making. The system lacks sufficient resolution and updating
capability necessary for aerial maneuvering associated with immediate decisions.

The Appliance Project Identifier (API) for the GTX 3X5 is GMN-01216. The API is used for project
identification with the FAA. Refer to applicable hardware and software part numbers to identify appliance
approvals.

Table 1-11 TSO Compliance

GTX

335

X [2] X [2] TSO-C88b --

X [1] X [1] TSO-C145d Class B2

GTX

345

X X TSO-C112e

X TSO-C154c Class A1S

X TSO-C157a Class 1

X

TSO-C166b

X Class A1S

X TSO-C195a

TSO

Class and

Level

Class 1

Level 2els

Class B1S

Class C1,
C2, C3, C4

Function

Automatic Pressure Altitude Reporting Code­Generating Equipment

Air Traffic Control Radar Beacon System / Mode Select
(ATCRBS/Mode S) Airborne Equipment

Airborne Navigation Sensors Using the Global
Positioning System Augmented by the Satellite Based
Augmentation System

Universal Access Transceiver (UAT) Automatic
Dependent Surveillance – Broadcast (ADS-B)
Equipment Operating on Frequency of 978 MHz

Aircraft Flight Information Services – Broadcast (FIS-B)
Data Link System and Equipment

Extended Squitter Automatic Dependent Surveillance –
Broadcast (ADS-B) and Traffic Information Service –
Broadcast (TIS-B) Equipment Operating on the Radio
Frequency of 1090 Megahertz (MHz)

Avionics Supporting Automatic Dependent Surveillance
– Broadcast (ADS-B) Aircraft Surveillance Applications
(ASA)

Notes:

[1] With internal GPS.

[2] With optional GAE module.

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Table 1-12 Applicable P/Ns

Description P/Ns

Main Software 006-B1607-0( )

ADS-B Software 006-B1797-0( )

GPS Software 006-B1827-0( )

Main Boot Block 006-B1607-BA through -B( )

ADS-B Boot Block 006-B1797-BA through -B( )

GPS Boot Block 006-B1827-B( )

Main CLD 006-C0153-22 through -2( )

ADS-B CLD 006-C0157-21 through -2( )

Table 1-13 TSO/ETSO Deviations

TSO Deviation

1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and
Date of Manufacture, Deviation and Software Part Number on the exterior of the unit.

TSO-C88b

TSO-C145d

TSO-C154c

TSO-C157a

TSO-C166b

TSO-C195a

2. Garmin is granted a deviation from the TSO to use RTCA DO-160G instead of earlier
versions of RTCA/DO-160 as the standard for Environmental Conditions and Test
Procedures for Airborne Equipment.

1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and
Date of Manufacture, Deviation and Software Part Number on the exterior of the unit.

2. Garmin is granted a deviation from TSO-C145d section 7.a that requires “…provide one copy
or on-line access to the data in paragraphs…5.f through 5.h of this TSO.”

3. Garmin is granted a deviation from RTCA/DO-229D Change 1 section 2.1.1.10 to use GPS
antennas that meet Garmin Minimum Performance Specifications (Document No. 004­00287-00).

1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and
Date of Manufacture, Deviation and Software Part Number on the exterior of the unit.

1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and
Date of Manufacture, Deviation and Software Part Number on the exterior of the unit.

2. Garmin is granted a deviation from RTCA DO-267A section 3.6.2.3 to use Product File
Identifier in addition to APDU Number when reconstructing a Product File from linked APDUs
as specified by Aerodrome and Airspace FIS-B Product Definitions, v4.00, dated May 2009.

1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and
Date of Manufacture, Deviation and Software Part Number on the exterior of the unit.

2. Garmin is granted a deviation from the TSO-C166b not to process ADS-R as required by
RTCA/DO-260B section 2.2.18.

3. Garmin is granted a deviation from RTCA/DO-260B section 2.1.10 to meet the transponder
function requirements of RTCA/DO-181E instead of RTCA/DO-181D.

1. Garmin is granted a deviation from the TSO for marking the TSO number, Type/Class and
Date of Manufacture, Deviation and Software Part Number on the exterior of the unit.

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1.14.1 Non-TSO Functions

The following are declared non-TSO functions, these non-TSO functions as defined in this manual have
been evaluated with the TSO functions. The design data for these non-TSO functions has been accepted by
the FAA when these non-TSO functions are installed in accordance with the guidance and limitations
provided in this manual.

The GTX 3X5 includes the following non-TSO functions.

• TIS-A (GTX 335)

• Wireless data conversion (Bluetooth interface) (GTX 345)

1.14.2 Design Assurance Levels
Table 1-14 Software Design Assurance Levels

System Function

Mode S transponder functionality C

Display of TIS-A traffic data C

Flight information data (FIS-B, including weather information) processing and output
to display

Display of outside air temperature (static) C

Flight timers C

1090 ADS-B transmission C

1090/UAT ADS-B reception B

Correlation of TCAS traffic with ADS-B, ADS-R, and TIS-B traffic B

Conflict Situational Awareness (CSA) including visual and aural alerts B

External UAT ADS-B control C

Internal GPS/SBAS B

Pressure sensor module C

Altitude monitor/alerting C

DO-178B

Level

D

Flight ID C

Bluetooth output E

HSDB packet forwarding B

Data concentrator C

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Table 1-15 Complex Hardware Design Assurance Levels

CAUTION

NOTE

Function DO-254

Main board, transponder, and I/O C

ADS-B board, 978 MHz and 1090 MHz receivers C

GPS receiver B [1]

Notes:

[1] Developed to DO-178B level B equivalent process.

1.14.3 Transmitter Grant of Equipment Authorization

Table 1-16 Equipment Authorization

Model FCC ID

GTX 335

GTX 335R

GTX 345

GTX 345R

IPH-02133

IPH-02256

1.15 License Requirements

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.

For non-US installations consult the local spectrum management agency for
requirements.

The Telecommunications Act of 1996, effective February 8, 1996, provides the FCC discretion to
eliminate radio station license requirements for aircraft and ships. The GTX 3X5 installation must obey
current transmitter licensing requirements. In the US, to find out the specific details on whether a particular
installation is exempt from licensing, visit the FCC website http://wireless.fcc.gov/aviation.

If an aircraft license is necessary, apply for a license on FCC Form 404, Application for Aircraft Radio
Station License. The FCC also has a fax-on-demand service to supply forms by fax. The GTX 3X5 owner

accepts all responsibility for obtaining the proper licensing before using the transponder.

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1.16 Reference Documents

These documents are additional sources of information to install the GTX 3X5. The technician should read
all related reference materials along with this manual before unit installation. The documents in table 1-17
are found at Garmin’s Dealer Resource Center

Table 1-17 Garmin Reference Documents

Document P/N

14 CFR 91.227 ADS-B Out Compatible Equipment 190-01533-00
Antenna Minimum Performance Specification for Garmin’s GPS/WAAS

Receiver System
G1000 System Installation Manual 190-00303-00
GTX 3X5 Pilot’s Guide 190-01499-00
GTX 3X5 Series Transponder G1000 Pilot’s Guide 190-01499-01
GTX 3X5 Environmental Qualification Form 005-00752-02

Table 1-18 Additional Reference Documents

Document P/N

Aerospace Systems Electrical Bonding and Grounding for Electromagnetic
Compatibility and Safety

Application for Aircraft Radio Station License FCC Form 404
FAA Advisory Circular, Acceptable Methods, Techniques, and Practices –

Aircraft Inspection and Repair
FAA Advisory Circular, Acceptable Methods, Techniques, and Practices –

Aircraft Alterations

.

004-00287-00

SAE ARP 1870

FAA AC 43.13-1B

FAA AC 43.13-2B

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2 LIMITATIONS

The GTX 3X5 meets the minimum performance and quality control standards that are necessary by the
TSOs in section 1.14. Installation of the GTX 3X5 requires separate approval.

2.1 HSDB Packet Forwarding

The GTX 345 HSDB interface is not approved for forwarding data whose failure condition for loss or
malfunction is classified as hazardous or catastrophic.

2.2 ARINC 429 Data Concentrator Function

ARINC 429 data from the GTX 3X5 must not be used for any function whose associated failure is
classified as hazardous or catastrophic.

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