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GTX 35R/45R Installation Manual
(Non-Certified Aircraft)
190-01499-10
October 2017
Revision 1

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Summarization of Contents

Export Control and Safety Information
Information Subject to Export Control Laws
States that the document may contain information subject to Export Administration Regulations (EAR).
Definitions of Warnings, Cautions, and Notes
Explains the meaning of WARNING, CAUTION, and NOTE indicators used in the manual.
Software License Agreement
Definitions
Defines terms used in the software license agreement for Garmin aviation products.
License Grant and Reservation of Rights
Outlines the terms of the license grant and Garmin's retained rights for the software.
Restrictions and Termination
Details prohibited uses, protection measures, and conditions for termination of the software license.
Disclaimer and Liability Limitations
Specifies disclaimers, limitations on liability, and indemnity clauses for the licensed software.
General Provisions of Agreement
Covers general terms such as amendments, severability, interpretation, and governing law for the agreement.
System Overview
Scope and Equipment Description
Defines the manual's scope and describes the GTX 35R/45R transponder units and their integration with G3X systems.
Definitions and Abbreviations
Provides definitions of terms and lists common abbreviations used throughout the document.
ADS-B and FIS-B Capabilities
Details the Automatic Dependent Surveillance-Broadcast (ADS-B) and Flight Information Services-Broadcast (FIS-B) features of the units.
TIS-A, Interface, and General Specifications
Covers Traffic Information Service-A, interface summary, and general physical/electrical specifications.
Transponder, Receiver, and Power Specifications
Details transponder, UAT/1090 MHz receiver, and power specifications for the units.
Certification and License Requirements
Outlines TSO certification, design assurance levels, and licensing requirements for the transponder.
Reference Documents
Lists additional documents for reference during installation, such as bonding standards and FAA advisory circulars.
Installation Overview and Procedures
Unit Configurations and Supplied Accessories
Details available unit configurations, part numbers, and standard accessories included with the GTX 35R/45R.
Installation Materials, Tools, and Antennas
Lists necessary unsupplied materials, special tools, and approved transponder antennas for installation.
Minimum System Configuration and Altitude Input
Outlines the required system components and explains pressure altitude input sources and priorities.
Wire Harness and Backshell Assembly
Covers wire harness installation, connector/backshell parts, and assembly procedures, including shielded cable preparation.
Cable Installation and GAE Integration
Details coaxial cable installation and the optional Garmin Altitude Encoder (GAE) integration process.
Equipment Rack and Unit Installation/Removal
Explains mounting racks, installing units, and removing them, including torque specifications for the locking mechanism.
Connector Pinout Information
Main Board Connector (P3251) Pin Assignments
Provides detailed pinout and I/O assignments for the P3251 main board connector.
ADS-B Board Connector (P3252) for GTX 45R
Details the pinout and I/O for the P3252 connector, specific to the GTX 45R model.
Power and Altitude Input Pin Configurations
Explains pin assignments for power, power control, and altitude inputs, including GAE module connection.
Discrete I/O, Serial Data, and Suppression Bus
Covers discrete I/O, RS-232, ARINC 429, HSDB, RS-422, and suppression bus pin details.
Garmin Altitude Encoder and USB Interface Pins
Lists pin assignments for the Garmin Altitude Encoder module and the USB interface used for dealer service.
Post Installation Configuration and Checkout
System Configuration and Ground Checks
Outlines required installation checks, system configuration, and ground checks for proper interface.
ARINC 429 Port Configuration
Describes how ARINC 429 ports are automatically configured by the G3X system for various data formats.
Unit Software Configuration and GAE Calibration
Details dealer-performed unit software updates and calibration of the optional Garmin Altitude Encoder.
Software Installation Procedure for Dealers
Guides Garmin dealers through the process of downloading and installing software updates using the GTX 35R/45R Install Tool.
GTX X5 Mechanical Drawings
Standard Remote Mount Assembly and Dimensions
Shows the assembly and critical dimensions of the GTX 35R/45R standard remote mount.
Connector and Vent Locations
Identifies the physical locations of connectors and vents on the GTX 35R/45R unit.
Optional Garmin Altitude Encoder Diagram
Illustrates the connection diagram for the optional Garmin Altitude Encoder module.
Equipment Compatibility and Configuration
ADS-B In Display Compatibility (GTX 45R)
Lists compatible ADS-B In displays and their interface configurations with the GTX 45R.
Compatible GPS Sources
Details compatible GPS sources for the GTX 35R/45R, including interface configurations and TSO compliance notes.
Interconnect Drawings
General Wiring Notes and HDSB Ethernet
Provides general wiring guidelines, wire specifications, and details for HDSB Ethernet cable usage.
GTX 35R/45R Typical Interconnect Diagram
Illustrates a typical wiring diagram connecting the GTX 35R/45R to other avionics systems.
GTX 45R Interconnects with GTN and GTS Systems
Shows specific interconnect diagrams for the GTX 45R with GTN 6XX/7XX and GTS 8XX systems.
GTX 35R Interconnects with GTS and GNS Systems
Depicts interconnect diagrams for the GTX 35R with GTS 8XX and GNS 400W/500W series units.
GTX 45R USB Programming Interface
Illustrates the USB connection for software updates and service by Garmin dealers.

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