Garmin GTX 33 User Manual

GTX 33

Transponder

Installation Manual

190-00906-00

September, 2012

Revision H

© Copyright 2012 Garmin Ltd. or its subsidiaries

All Rights Reserved

Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded or stored in any storage medium, for any purpose without the express prior written consent of Garmin. Garmin hereby grants permission to download a single copy of this manual and of any revision to this manual onto a hard drive or other electronic storage medium to be viewed and to print one copy of this manual or of any revision hereto, provided that such electronic or printed copy of this manual or revision must contain the complete text of this copyright notice and provided further that any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.

Garmin International, Inc.

1200 E. 151st Street

Olathe, KS 66062 USA

Telephone: [phone]

Aviation Panel-Mount Technical Support Line (Toll Free) 1.888.606.5482

www.garmin.com

			Garmin (Europe) Ltd.
			Liberty House, Bulls Copse Road
			Hounsdown Business Park
			Southampton, SO40 9RB U.K.
			+44/ (0) 870.8501241
			Garmin AT, Inc.
			2345 Turner Rd., SE
			Salem, OR 97302 USA
			Telephone: [phone]
			RECORD OF REVISIONS
	Revision	Revision Date	Description
	A	9/22/08	Production Release
	B	2/26/09	Clarified model name
	C	9/3/10	Updated outline/installation drawings and interconnects, added
			ETSO information
	D	10/27/10	Added GTX 33H, GTX 33DH, and non-extended squitter units info,
			simplified doc title
	E	3/21/12	Added ADS-B info
	F	6/13/12	Added TNC connectors
	G	09/11/12	Updated per SW v7.00
	H	09/24/12	Updated per SW v7.01

GTX 33 Installation Manual	190-00906-00
Page A	Rev. H

CURRENT REVISION DESCRIPTION

	Revision	Page	Section	Description of Change
		Number(s)	Number
		1-3	1.3.1	Updated SW version
	H	1-4	1.3.1.2	Updated SW version
		1-10	1.9.1	Updated SW version

DOCUMENT PAGINATION

Section	Page Range
Table of Contents	i – x
Section 1	1-1	– 1-12
Section 2	2-1	– 2-10
Section 3	3-1	– 3-8
Section 4	4-1	– 4-10
Appendix A	A-1	– A-2
Appendix B	B-1	– B-18
Appendix C	C-1	– C-6
Appendix D	D-1	– D-7

190-00906-00	GTX 33 Installation Manual
Rev. H	Page i

INFORMATION SUBJECT TO EXPORT CONTROL LAWS

This document may contain information which is subject to the Export Administration Regulations (“EAR”) issued by the United States Department of Commerce (15 CFR, Chapter VII Subchapter C) and which may not be exported, released or disclosed to foreign nationals inside or outside the United States without first obtaining an export license. The preceding statement is required to be included on any and all reproductions in whole or in part of this manual.

DEFINITIONS OF WARNINGS, CAUTIONS, AND NOTES

WARNING

Warnings are used to bring to the installer’s immediate attention that not only damage to the equipment but personal injury may occur if the instruction is disregarded.

CAUTION

Cautions are used to alert the individual that damage to equipment may result if the procedural step is not followed to the letter.

NOTE

Notes are used to expand and explain the preceding step and provide further understanding of the reason for the particular operation.

WARNING

This product, its packaging, and its components contain chemicals known to the 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.

NOTE

Throughout this document references made to GTX 33 shall equally apply to the GTX 33, GTX 33D, GTX 33H, and GTX 33DH, with or without Extended Squitter; except where specifically noted.

GTX 33 Installation Manual	190-00906-00
Page ii	Rev. H

GTX 33 HARDWARE MOD LEVEL HISTORY

The following table identifies hardware modification (Mod) Levels for the GTX 33. Mod Levels are listed with the associated service bulletin number, service bulletin date, and the purpose of the modification. The table is current at the time of publication of this manual (see date on front cover) and is subject to change without notice. Authorized Garmin Sales and Service Centers are encouraged to access the most up-to-date bulletin and advisory information on the Garmin web site at www.garmin.com using their Garmin-provided user name and password.

GTX 33 P/N 011-00779-00, 011-00779-20 HARDWARE MOD LEVEL HISTORY

	MOD	SERVICE	SERVICE
		BULLETIN	BULLETIN	PURPOSE OF MODIFICATION
	LEVEL
		NUMBER	DATE
	1	0710	05/18/07	Improve decay time of the suppression circuit
	GTX 33 P/N 011-00779-10, 011-00779-30 HARDWARE MOD LEVEL HISTORY
	MOD	SERVICE	SERVICE
		BULLETIN	BULLETIN	PURPOSE OF MODIFICATION
	LEVEL
		NUMBER	DATE
	1	0624	04/28/07	Improve rejection of high-power in-band signals
	2	0710	05/18/07	Improve decay time of the suppression circuit
	GTX 33 P/N 011-00779-01, 011-00779-21 HARDWARE MOD LEVEL HISTORY
	MOD	SERVICE	SERVICE
		BULLETIN	BULLETIN	PURPOSE OF MODIFICATION
	LEVEL
		NUMBER	DATE
				GTX 33D Only. Switch/Diplexer Assembly
	1	0311	02/06/04	reworked to prevent +200 Volt supply line from
				shorting to the chassis.
	2	0624	04/25/07	Improve rejection of high-power in-band signals
	3	0710	05/18/07	Improve decay time of the suppression circuit
	GTX 33 P/N 011-00779-50, 011-00779-70 HARDWARE MOD LEVEL HISTORY
	MOD	SERVICE	SERVICE
		BULLETIN	BULLETIN	PURPOSE OF MODIFICATION
	LEVEL
		NUMBER	DATE
	None at
	this time

190-00906-00	GTX 33 Installation Manual
Rev. H	Page iii

Limited Warranty

All Garmin avionics products are warranted to be free from defects in materials or workmanship for: one years from the date of purchase for new Remote-Mount and Panel-Mount products; one year from the date of purchase for new portable products and any purchased newly-overhauled products; six months for newly-overhauled products exchanged through a Garmin Authorized Service Center; and 90 days for factory repaired or newly-overhauled products exchanged at Garmin in lieu of repair. Within the applicable period, Garmin will, at its sole option, repair or replace any components that fail in normal use. Such repairs or replacement will be made at no charge to the customer for parts or labor, provided that the customer shall be responsible for any transportation cost. This warranty does not apply to: (i) cosmetic damage, such as scratches, nicks and dents; (ii) consumable parts, such as batteries, unless product damage has occurred due to a defect in materials or workmanship; (iii) damage caused by accident, abuse, misuse, water, flood, fire, or other acts of nature or external causes; (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.

THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING ANY LIABILITY ARISING UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, WHICH MAY VARY FROM STATE TO STATE.

IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE OR INABILITY TO USE THE PRODUCT OR FROM DEFECTS IN THE PRODUCT. SOME STATES DO NOT ALLOW THE EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.

Garmin retains the exclusive right to repair or replace (with a new or newly-overhauled replacement product) the product or software or offer a full refund of the purchase price at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.

Online Auction Purchases: Products purchased through online auctions are not eligible for warranty coverage. Online auction confirmations are not accepted for warranty verification. To obtain warranty service, an original or copy of the sales receipt from the original retailer is required. Garmin will not replace missing components from any package purchased through an online auction.

International Purchases: A separate warranty may be provided by international distributors for devices purchased outside the United States depending on the country. If applicable, this warranty is provided by the local in-country distributor and this distributor provides local service for your device. Distributor warranties are only valid in the area of intended distribution. Devices purchased in the United States or Canada must be returned to the Garmin service center in the United Kingdom, the United States, Canada, or Taiwan for service.

Garmin International, Inc.	Garmin (Europe) Ltd.
1200 East 151st Street	Liberty House, Bulls Copse Road
Olathe, Kansas 66062, U.S.A.	Hounsdown Business Park
Phone:[phone]	Romsey, SO40 9RB, U.K.
FAX:[phone]	Phone:44/ (0) 870.8501241
	FAX:44/ (0) 870.850125

GTX 33 Installation Manual	190-00906-00
Page iv	Rev. H

TABLE OF CONTENTS

PARAGRAPH PAGE

Section 1 GENERAL DESCRIPTION			.............................................................1-1
1.1	Introduction......................................................................................................................		1-1
1.2	Equipment Description ....................................................................................................		1-1
1.3	ADS-B Capabilities .........................................................................................................		1-2
1.4	TIS System Capabilities...................................................................................................		1-4
1.5	Mutual Suppression Pulses ..............................................................................................		1-4
1.6	Interface Summary...........................................................................................................		1-5
1.7	Technical Specifications ..................................................................................................		1-6
1.8	Operating Instructions......................................................................................................		1-8
1.9	Aircraft Station Licensing Requirements ........................................................................		1-8
1.10		Certification ...................................................................................................................	1-9
1.11		Operating Instructions..................................................................................................	1-11
1.12		Reference Documents ..................................................................................................	1-12

Section 2 INSTALLATION OVERVIEW........................................................		2-1
2.1	Introduction......................................................................................................................	2-1
2.2	Installation Materials .......................................................................................................	2-1
2.3	Installation Considerations ..............................................................................................	2-3
2.4	Cabling and Wiring..........................................................................................................	2-5
2.5	Installation Approval Considerations for Pressurized Aircraft........................................	2-6
2.6	Cooling Air ......................................................................................................................	2-6
2.7	GTX 33 Mounting Requirements ....................................................................................	2-7

Section 3 INSTALLATION PROCEDURE.....................................................		3-1
3.1	Unpacking Unit................................................................................................................	3-1
3.2	Wiring Harness Installation .............................................................................................	3-1
3.3	Backshell Assembly.........................................................................................................	3-3
3.4	Weight and Balance .........................................................................................................	3-5
3.5	Electrical Load Analysis..................................................................................................	3-5
3.6	Final Installation ..............................................................................................................	3-5
3.7	Post Installation Configuration and Checkout .................................................................	3-6
3.8	Continued Airworthiness .................................................................................................	3-8

Section 4 SYSTEM INTERCONNECTS..........................................................		4-1
4.1	Pin List.............................................................................................................................	4-1
4.2	Power Functions ..............................................................................................................	4-3
4.3	Temperature Inputs ..........................................................................................................	4-4
4.4	Altitude Functions............................................................................................................	4-4
4.5	Discrete Functions ...........................................................................................................	4-6
4.6	Serial Data Electrical Characteristics ..............................................................................	4-7

190-00906-00	GTX 33 Installation Manual
Rev. H	Page v

PARAGRAPH	PAGE
4.7 RS-232 Input/Output, Software Update Connections	...................................................... 4-9

Appendix A CONSTRUCTION AND VALIDATION OF
	STRUCTURES.............................................................................	A-1
A.1	Static Test Loading ........................................................................................................	A-1
A.2	Determining Static Load Capability ..............................................................................	A-1
Appendix B VERSION 1 ADS-B FIELD APPROVAL COMPLIANCE
	MATRIX .......................................................................................	B-1
Appendix C OUTLINE AND INSTALLATION DRAWINGS.....................		C-1
Appendix D INTERCONNECT DRAWINGS................................................		D-1

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Page vi	Rev. H

LIST OF FIGURES

FIGURE	PAGE
Section 1 GENERAL DESCRIPTION .............................................................	1-1
Section 2 INSTALLATION OVERVIEW........................................................	2-1
Figure 2-1. Antenna Installation Considerations ..................................................................	2-4
Figure 2-2. GTX 33 Modular Rack (115-00438-00) ............................................................	2-8
Figure 2-3. GTX 33 Stand-Alone Rack (115-00629-00)......................................................	2-8
Figure 2-4. GTX 33H Stand-Alone Rack (011-02422-00)...................................................	2-9
Figure 2-5. GTX 33 Stand-Alone Rack, Suggested Mounting Locations ..........................	2-10
Section 3 INSTALLATION PROCEDURE.....................................................	3-1
Section 4 SYSTEM INTERCONNECTS..........................................................	4-1
Figure 4-1. View of J3301 connector from back of unit ......................................................	4-1
Figure 4-2. GTX 33 Software Update Connections .............................................................	4-9
Appendix A CONSTRUCTION AND VALIDATION OF
STRUCTURES.............................................................................	A-1
Figure A-1. Upward Static Load Test..................................................................................	A-2
Figure A-2. Forward Static Load Test .................................................................................	A-2
Appendix B VERSION 1 ADS-B FIELD APPROVAL COMPLIANCE
MATRIX.......................................................................................	B-1
Appendix C OUTLINE AND INSTALLATION DRAWINGS ....................	C-1
Figure C-1 GTX 33 in Modular Rack, Outline Drawing......................................................	C-1
Figure C-2 GTX 33 G1000 Connector/Rack Assembly Drawing........................................	C-2
Figure C-3 GTX 33 Remote Stand-Alone Rack/Connector Assembly (Sheet 1 of 2) .........	C-3
Figure C-3 GTX 33 Remote Stand-Alone Rack/Connector Assembly (Sheet 2 of 2) .........	C-4
Figure C-4 GTX 33H Remote Stand-Alone Rack/Connector Assembly (Sheet 1 of 2) ......	C-5
Figure C-4 GTX 33H Remote Stand-Alone Rack/Connector Assembly (Sheet 2 of 2) ......	C-6
Appendix D INTERCONNECT DRAWINGS ...............................................	D-1
Figure D-1 GTX 33 Typical Garmin Integrated Flight Deck Interconnect Wiring
Diagram ................................................................................................................................	D-1
Figure D-2 GTX 33 to GNS 480 (CNX 80) Simplified Interconnect Wiring Diagram ......	D-2
Figure D-3 GTX 33 to MFD, Simplified Interconnect Wiring Diagram.............................	D-3
Figure D-4 Dual GTX 33 to GNS 480 (CNX80) Interconnect Wiring Diagram,
Single Altitude Encoder (Sheet 1 of 2).................................................................................	D-4

190-00906-00	GTX 33 Installation Manual
Rev. H	Page vii

FIGURE		PAGE
Figure D-4	Dual GTX 33 to GNS 480 (CNX80) Interconnect Wiring Diagram,
Single Altitude Encoder (Sheet 2 of 2).................................................................................		D-5
Figure D-5	Dual GTX 33 to GTN 6XX/7XX Interconnect Wiring Diagram, Encoding
Altitude Connections (Sheet 1 of 2) .....................................................................................		D-6
Figure D-5	Dual GTX 33 to GTN 6XX/7XX Interconnect Wiring Diagram, Encoding
Altitude Connections (Sheet 2 of 2) .....................................................................................		D-7

GTX 33 Installation Manual	190-00906-00
Page viii	Rev. H

LIST OF TABLES

TABLE PAGE

Section 1 GENERAL DESCRIPTION .............................................................			1-1
Table 1-1	ADS-B Versions...................................................................................................		1-3
Table 1-2. GTX 33		Physical Characteristics ........................................................................	1-6
Table 1-3. GTX 33		General Specifications ..........................................................................	1-7
Table 1-4. GTX 33		Power Requirements .............................................................................	1-7
Table 1-5	TSO/ETSO/RTCA/ICAO Compliance ................................................................		1-9
Table 1-6	TSO/ETSO Deviations .......................................................................................		1-11
Table 1-7. GTX 33		Reference Documents .........................................................................	1-12

Section 2 INSTALLATION OVERVIEW........................................................			2-1
Table 2-1.	GTX 33	Part Numbers.........................................................................................	2-1
Table 2-2.	GTX 33	Accessories............................................................................................	2-2
Table 2-3.	GTX 33	Cabling and Wiring ...............................................................................	2-5

Section 3 INSTALLATION PROCEDURE.....................................................		3-1
Table 3-1	Pin Contact Part Numbers (High Density) ...........................................................	3-1
Table 3-3.	Recommended Crimp Tools................................................................................	3-2
Table 3-2	Recommended Crimp Tools (High Density)........................................................	3-2
Table 3-4.	Unit Power Loads................................................................................................	3-5

Section 4 SYSTEM INTERCONNECTS..........................................................		4-1
Table 4-1.	P3301 Pin List .....................................................................................................	4-1
Table 4-2.	Aircraft Power .....................................................................................................	4-3
Table 4-3.	Temperature Inputs..............................................................................................	4-4
Table 4-4.	Altimeter Inputs...................................................................................................	4-5
Table 4-5.	Discrete Outputs ..................................................................................................	4-6
Table 4-6.	Discrete Inputs.....................................................................................................	4-6
Table 4-7.	RS-232 Input/Output ...........................................................................................	4-7
Table 4-8. ARINC 429 Channels..........................................................................................		4-8
Table 4-9. ARINC Labels.....................................................................................................		4-8
Appendix A CONSTRUCTION AND VALIDATION OF
	STRUCTURES ............................................................................	A-1
Table A-1. Static Test Load...............................................................................................		A-1
Appendix B VERSION 1 ADS-B FIELD APPROVAL COMPLIANCE
	MATRIX ......................................................................................	B-1
Table B-1.	Version 1 ADS-B Field Approval Compliance Matrix ....................................	B-2

190-00906-00	GTX 33 Installation Manual
Rev. H	Page ix

TABLE	PAGE
Appendix C OUTLINE AND INSTALLATION DRAWINGS	....................C-1
Appendix D INTERCONNECT DRAWINGS ...............................................	D-1

GTX 33 Installation Manual	190-00906-00
Page x	Rev. H

1 GENERAL DESCRIPTION

1.1 Introduction

This manual is intended to provide mechanical and electrical information for use in the planning and design of an installation of the Garmin GTX 33 Mode S Transponder into an aircraft. These versions include all GTX 33, GTX 33D, GTX 33H, and GTX 33DH units with or without Extended Squitter Enabled; as part of a Garmin Integrated Flight Deck. This manual is not a substitute for an approved airframe-specific maintenance manual, installation design drawing, or complete installation data package. Attempting to install equipment by reference to this manual alone and without first planning or designing an installation specific to your aircraft may compromise your safety and is not recommended. The content of this manual assumes use by competent and qualified avionics engineering personnel and/or avionics installation specialists using standard aviation maintenance practices in accordance with Title 14 of the Code of Federal Regulations and other relevant accepted practices. This manual is not intended for use by individuals who do not possess the competencies and abilities set forth above.

NOTE

Garmin recommends installation of the GTX 33 by a Garmin-authorized installer. To the extent allowable by law, Garmin will not be liable for damages resulting from improper or negligent installation of the GTX 33. For questions, please contact Garmin Aviation Product Support at 1-888-606-5482.

The GTX 33 can also be incorporated as a remote mounted unit in installations with other compatible control/display units such as the Garmin GNS 480 (CNX80), GTN 6XX/7XX, and GMX 200 (MX20) Multifunction Display (MFD).

1.2 Equipment Description

The Garmin GTX 33 rack mounted Mode S Transponder is a radio transmitter and receiver that operates on radar frequencies, receiving ground radar and TCAS interrogations at 1030 MHz and transmitting a coded response of pulses on a frequency of 1090 MHz. The GTX 33 is equipped with IDENT capability that activates the Special Position Identification (SPI) pulse for 18 seconds.

The GTX 33 replies to Mode A, Mode C and Mode S interrogation. Mode A replies consist of framing pulses and any one of 4,096 codes, which differ in the position and number of pulses transmitted. Mode C replies include framing pulses and encoded altitude.

The GTX 33 with Extended Squitter Enabled provides Automatic Dependent Surveillance-Broadcast (ADS-B) technology that improves situational awareness and flight safety. With ADS-B capabilities, position, velocity, and heading information are automatically transmitted to other aircraft and ground stations. The current air traffic control system depends on the transmission of interrogations for pertinent aircraft information at a slower update rate. ADS-B provides immediate surveillance of air-to-air traffic and aircraft in remote or inhospitable areas not currently covered by radar.

Ground stations can interrogate Mode S Transponders individually using a 24-bit ICAO Mode S address, which is unique to the particular aircraft. In addition, ground stations may interrogate a GTX 33 for its Transponder data capability and the aircraft's Flight ID, which is the registration number or other call sign. The GTX 33 makes the maximum airspeed capability (set during configuration setup) available to TCAS systems on-board nearby aircraft to aid in the determination of TCAS advisories.

The unit features an altitude monitor and TIS traffic advisories. A voice or tone audio output announces altitude and traffic alerts. The GDU Primary Flight Display screen displays the code, reply symbol and mode of operation, depending on equipment connections and configuration selection. The GNS 480

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Rev. H	Page 1-1

(CNX80), GTN 6XX/7XX, and GMX 200 (MX20) MFD provide similar information with the addition of pressure altitude.

The GTX 33 features multiple transmit/receive ARINC 429 and RS-232 data ports. The unit concentrates data from three ARINC 429 inputs, gray code, RS-232 input data and discrete inputs to the high-speed RS-232 data ports for display on the flight displays. Although multiple output capability is available, the unit is designed to feed all outgoing data via RS-232 data ports. Two RS-232 data ports send and receive data to/from the GIA 63(W) Integrated Avionics Units (IAU), GNS 480 (CNX80), GTN 6XX/7XX, or GMX 200 (MX20) Multifunction Display.

Provision is made for unit software upgrade by means of RS-232 data through rear connector pins. In installations where the transponder interfaces with a GNS 480 (CNX80) or GTN 6XX/7XX the installation of an optional connector is highly recommended. If the optional connector is placed in the aircraft, transponder removal and reinstallation for software upgrade is not required. The software can be changed while the unit is still mounted inside the aircraft.

The GTX 33 meets Mode S Enhanced Surveillance (EHS) requirements. Mode S Enhanced Surveillance is used predominantly in European airspace. It provides information consisting of additional aircraft parameters (see JAA NPA 20-12a) to ground radar systems. Compliance with Enhanced Surveillance may require additional interface between aircraft systems and the GTX 33.

The GTX 33 and GTX 33D differ from the GTX 33H and GTX 33DH in the qualified DO-160 vibration categories. See the GTX 33 Environmental Qualification Form (005-00131-03) for details.

1.3 ADS-B Capabilities

The Extended Squitter Enabled GTX 33 provides the capabilities of Automatic Dependent SurveillanceBroadcast (ADS-B) technology, which improves situational awareness and flight safety. With ADS-B capabilities, position, velocity, and heading information are automatically transmitted to other aircraft and ground stations. The current air traffic control system depends on a transponder request for pertinent aircraft information. ADS-B provides automatic transmission of aircraft information without a request.

NOTE

RS-232 ADS-B Out from a Garmin 4XX/5XX WAAS, GTN 6XX/7XX with GPS software version 3.20 or later, or a GPS WAAS source that supports ARINC 743A output is required to support ADS-B transmissions.

GTX 33 Installation Manual	190-00906-00
Page 1-2	Rev. H

1.3.1ADS-B Versions

There are three distinct ADS-B versions recognized by regulatory authorities. As show in the table below, the Garmin GTX 33 w/ES currently supports ADS-B Out 1090MHz Extended Squitter capability meeting ‘Version 1’ ADS-B or ‘Version 2' ADS-B system requirements depending on software version (see Table 1-1).

NOTE

GTX 33 w/ES transponders with software version 6.20 or earlier are not compliant with ADS-B version required by the 14 CFR 91.225(a) equipage mandate.

Table 1-1 ADS-B Versions

	ADS-B	GTX 33 w/ES	Supported	Regulatory Standard/Minimum Performance
	Version	Compliant	SW Version	Specification
	Version 0	No	None	Equipment designed to TSO-166 / RTCA DO-260
	Version 1	Yes	6.00 - 6.20	Equipment designed to TSO-166a / RTCA DO-260A
	Version 2*	Yes	7.01	Equipment designed to TSO-166b / RTCA DO-260B
			and later
	*Version required by 2020 ADS-B Out mandate defined in 14 CFR 91.225

1.3.1.1Installation Approval of Version 1 ADS-B Systems

GTX 33 w/ES transponders running software versions v6.00 through v6.20 support Version 1 ADS-B Out functionality. According to AIR-130 Policy Memo ‘Approval for ADS-B Out Systems’, dated August 30, 2010, the FAA has suspended field approvals of Version 2 ADS-B Out equipment. At the time of this publication, there is currently no FAA policy addressing field approvals of Version 0 or Version 1 systems. GTX 33 w/ES transponders with Version 1 ADS-B remain eligible for field approval.

There are three options for installers wanting to install GTX 33 w/ES transponders with software versions

6.00through 6.20:

1.Installers may elect to disable the ADS-B Extended Squitter function, as described in Section 3.7.1.

2.Installers may utilize a Supplemental Type Certificate (STC) for the GTX 33 with the Version 1 ADS-B Extended Squitter activated.

3.Installers may obtain a field approval with the Version 1 ADS-B Extended Squitter activated. EASA AMC 20-24 compliance matrix provided in Appendix B may be used to assist installers in showing compliance to the AMC requirements. This data together with Form 337 may be used for approval by the appropriate FSDO inspector.

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1.3.1.2Installation Approval of Version 2 ADS-B Systems

GTX 33 w/ES transponders running software versions v7.01 and later support Version 2 ADS-B Out functionality. According to AIR-130 Policy Memo ‘Approval for ADS-B Out Systems’, dated August 30, 2010, a Supplemental Type Certificate (STC) is required for the approval of Version 2 ADS-B Out equipment.

There are two options for installers wanting to install GTX 33 w/ES transponders running software versions v7.01 and later:

1.Installers may elect to disable the ADS-B Extended Squitter function, as described in Section 3.7.1.

2.Installers must utilize a Supplemental Type Certificate (STC) for the GTX 33 with the Version 2 ADS-B Extended Squitter activated.

NOTE

It is the installer’s responsibility to ensure the ADS-B Out system is compliant with

AC 20-165 and to ensure compatibility between the GTX 33 and the ADS-B Out position source equipment. See Garmin ADS-B Out Compatible Equipment (190-01533-00) for compatible equipment shown to be eligible for 14 CFR 91.227-compliant installations in accordance with AC 20-165

1.4 TIS System Capabilities

Traffic Information Service (TIS) provides a graphic display of traffic advisory information in the cockpit for non-TCAS equipped aircraft.

TIS is a ground-based service providing relative location of all transponder equipped aircraft within a specified service volume. 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 33 transponder. Traffic can then be displayed on a Garmin GDU Primary Flight Display, GMX 200 (MX20) Multifunction Display, GNS 480 (CNX80), GTN 6XX/7XX or other compatible display unit.

Surveillance data includes all transponder equipped aircraft within the coverage volume. Aircraft without an operating transponder are invisible to TIS. TIS displays traffic within seven nautical miles from 3000 feet below to 3500 feet above the requesting aircraft.

1.5 Mutual Suppression Pulses

Other equipment on board the aircraft may transmit in the same frequency band as the transponder, such as DME or another transponder. Mutual suppression is a synchronous pulse that is sent to the other equipment to suppress transmission of a competing transmitter for the duration of the pulse train transmission. The transponder transmission is suppressed by an external source and other equipment on board is suppressed by the GTX 33 transponder. This feature is designed to limit mutual interference.

GTX 33 Installation Manual	190-00906-00
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1.6 Interface Summary

The GTX 33 provides the following interface connections via the rear connector. See Section 4 and Appendix D for connection details.

•Ten (10) encoding altimeter inputs

•External IDENT input

•External STBY input (useful for dual transponder installations)

•External suppression pulse input

•Switched power output of up to 1.5 amps (for digital altitude encoder power)

•Aircraft power input (14/28 Vdc)

•Remote power turn on

•Serial airdata or GPS groundspeed input

•Serial altitude input (Reduces wire count vs. parallel wire gray code altimeter interface.)

•Software update input

•Supports Comm-A and Comm-B protocol

•Temperature, Altitude Hold and Density Altitude

•Digitally recorded voice and discrete warning annunciator activated by Altitude Hold when limits are exceeded

•Diversity: GTX 33D is available with the diversity feature

•ARINC 429 input

The GTX 33 P/N 010-00267-() and GTX 33D 010-00294-() support the following list of Comm-B Definition Subfield (BDS) registers:

•BDS (0,0) Air Initiated Comm-B (AICB).

•BDS (1,0) Data Link Capability Report.

•BDS (1,7) Common Usage Ground Initiated Comm-B (GICB) Capability Report.

•BDS (1,8) Mode S Specific Services GICB Capability Report.

•BDS (1,9) Mode S Specific Services GICB Capability Report.

•BDS (1,D) Mode S Specific Services Protocols (MSP) Capability Report.

•BDS (2,0) Aircraft Identification.

•BDS (4,0) Selected Vertical Intention

•BDS (5,0) Track and Turn Report

•BDS (6,0) Heading and Speed Report

•BDS (0,6) Extended Squitter surface Position

•BDS (0,5) Extended Squitter Airborne Position

•BDS (0,8) Extended Squitter Aircraft Identification and Category

•BDS (0,9) Extended Squitter Airborne Velocity – Subtypes 1 and 3

•BDS (0,A) Extended Squitter Event Driven Data

•BDS (6,1) Emergency/Priority Status

•BDS (6,5) Aircraft operational Status

190-00906-00	GTX 33 Installation Manual
Rev. H	Page 1-5

1.7 Technical Specifications

It is the responsibility of the installing agency to obtain the latest revision of the GTX 33 Environmental Qualification Form. This form is available directly from Garmin under the following part number:

GTX 330/GTX 33/GTX 328/GTX 23 Environmental Qualification Form, Garmin part number 005-00131-03

To obtain a copy of this form, see the dealer/OEM portion of the Garmin web site (www.garmin.com).

1.7.1Physical Characteristics

Table 1-2. GTX 33 Physical Characteristics

	Characteristic		Specification
	Modular Rack Width	1.72	Inches (44 mm)
	Modular Rack Height	6.30	Inches (160 mm)
	Modular Rack Weight	0.4 lbs. (0.18 kg)
	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)
	Stand-Alone H Rack Width	1.77	Inches (45 mm)
	Stand-Alone H Rack Height	6.98	Inches (177 mm)
	Stand-Alone H Rack Weight	0.7 lbs. (0.29 kg)
	Depth Including Connectors (measured from front	11.05 Inches (281 mm)
	face of unit to rear of connector backshells)	(Modular and Stand-Alone)
	Depth Including Connectors and Shield Blocks	11.44 inches (291 mm)
	(measured from front face of unit to rear of shield
		(Modular and Stand-Alone)
	blocks)
	Connecter Weight (including backshell)	0.4 lbs (0.18 kg)
	GTX 33 Unit Weight	3.1 lbs. (1.41 kg)
	GTX 33D Unit Weight	3.4 lbs. (1.54 kg)
	GTX 33H Unit Weight	3.2 lbs. (1.45 kg)
	GTX 33DH Unit Weight	3.3 lbs. (1.49 kg)

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1.7.2General Specifications

Table 1-3. GTX 33 General Specifications

	Characteristic	Specification
	Regulatory Compliance;	RTCA DO-160D, RTCA DO-181C, RTCA DO-260B,
	GTX 33 w/ES, GTX 33D w/ES	EuroCAE ED-102A, EuroCAE ED-73A, EuroCAE ED-73B
	Unit Software	RTCA DO-178B Level C/D (refer to Section 1.9.1 for specific
		applicability)
	Complex Electronic Hardware	RTCA/DO-254 Level C (refer to Section 1.9.1 for specific
		applicability)
	FCC Authorization	Emission Designator 12M0M1D
	Temperature Range	-45°C to +70°C (continuous operation)
	Altitude	55,000 Feet
	Transmitter Frequency	1090 MHz ±1 MHz
	Transmitter Power	125 Watts minimum, 250 Watts nominal
	Receiver Frequency	1030 MHz
	Receiver Sensitivity	-74 dBm nominal for 90% replies
	Mode A Capability	4096 Identification Codes
		100 Foot Increments from -1000 to 62,700 feet.
	Mode C Capability	25 Foot Increments from -1000 to 50,175 feet with suitable serial data
		altitude.
	Mode S Capability	Selective Identification Codes, Aircraft Type
	External Suppression Input	Low ≤ 0.5 V; High ≥ 8 V
	External Suppression	Output: minimum is +18V (for 300 ohm load) and maximum of +23V
	Output	(for 2000 ohm load)
	Audio Output	4.04 Vrms to 7.85 Vrms into a 500 ohm load

1.7.3Power Requirements

Table 1-4. GTX 33 Power Requirements

	Characteristic	Specification
	Input Voltage	14/28 Vdc See the Environmental Qualification Form for details
		on surge ratings and minimum/maximum operating voltages.
	Power Input	22 Watts Typical, 45 Watts Maximum
	Maximum Full TSO Reply Rate;	1.6 A @ 27.5 Vdc, 3.1 A @13.75 Vdc
	1200 PRF, Code 7777
	Maximum Quiescent	0.85 A @ 27.5 Vdc, 1.1 A @ 13.75 Vdc

190-00906-00	GTX 33 Installation Manual
Rev. H	Page 1-7

1.8 Aircraft Station Licensing 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 33 installation must comply with current transmitter licensing requirements. To find out the specific details on whether a particular installation is exempt from licensing, please visit the FCC web site http://wireless.fcc.gov/aviation.

If an aircraft license is required, make application for a license on FCC form 404, Application for Aircraft Radio Station License. The FCC also has a fax-on-demand service to provide forms by fax. The GTX 33 owner accepts all responsibility for obtaining the proper licensing before using the GTX 33.

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.

NOTE

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

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Page 1-8	Rev. H

1.9 Certification

The conditions and tests required for TSO approval of this article are minimum performance standards. It is the responsibility of those installing this article either on or within a specific type or class of aircraft to determine that the aircraft installation conditions are within the TSO standards. TSO articles must have separate approval for installation in an aircraft. The article may be installed only if performed under

14 CFR part 43 or the applicable airworthiness requirements.

It is the installer’s responsibility to ensure the ADS-B Out system is compliant with AC 20-165 and to ensure compatibility between the GTX 33 and the ADS-B Out position source equipment. See Garmin ADS-B Out Compatible Equipment (190-01533-00) for compatible equipment shown to be eligible for 14 CFR 91.227-compliant installations in accordance with AC 20-165.

1.9.1GTX 33 TSO/ETSO/RTCA/ICAO Compliance

Table 1-5 TSO/ETSO/RTCA/ICAO Compliance

		Performance Standard		Applicable LRU SW Part
	Function	(TSO/ETSO/RTCA/	Category
				Numbers (See Note 4)
		EUROCAE)
	Air Traffic Control Radar
	Beacon System/Mode Select	TSO-C112	Class 2A	All
	(ATCRBS/MODE S) Airborne			006-B0172-01 Rev. ()
	Equipment			except
	Traffic Information Service			006-B0172-01 Rev. A
		RTCA DO-239	-	(v1.00)
	(TIS)
	Air Traffic Control Radar			006-B0172-01
			2C112b	Rev. B (v3.00)
	Beacon System/Mode Select	ETSO-2C112a	Class 1	through
	(ATCRBS/MODE S) Airborne
			Level 2s	006-B0172-01
	Equipment
				Rev. U (v5.01)
				All
				006-B0172-01 Rev. ()
	Air Traffic Control Radar		2C112b	except
	Beacon System/Mode Select			006-B0172-01 Rev. A
		ETSO-2C112a	Class 1
	(ATCRBS/MODE S) Airborne			(v1.00)
			Level 2es
	Equipment			through
				006-B0172-01 Rev. U
				(v5.01)
				All
				006-B0172-01 Rev. ()
		ICAO Annex 10,		except
	Enhanced Surveillance	Amendment 77	-	006-B0172-01 Rev. A
		Tables: 2-64, 2-80, 2-96		(v1.00)
		(See Note 1)		through
				006-B0172-01 Rev. J
				(v3.06)

190-00906-00	GTX 33 Installation Manual
Rev. H	Page 1-9

Table 1-5 TSO/ETSO/RTCA/ICAO Compliance

		Performance Standard		Applicable LRU SW Part
	Function	(TSO/ETSO/RTCA/	Category
				Numbers
		EUROCAE)
				All
		TSO-C166a	B0 (non-	006-B0172-01 Rev. V
			diversity)	(v6.00)
		ETSO-C166a
			B1	through
		(See Note 2)
			(diversity)	006-B0172-01 Rev. Z
	Extended Squitter Automatic			(v6.20)
	Dependent Surveillance –			All
	Broadcast (ADS-B) and			006-B0172-01 Rev. ()
	Traffic Information Services –		B1S (non-	(v7.01 or later)
	Broadcast (TIS-B)			except
		TSO-C166b	diversity)
				006-B0172-01 Rev. A
		(See Note 3)	B1
				(v1.00)
			(diversity)
				through
				006-B0172-01 Rev. Z
				(v6.20)
	RTCA DO-178B Compliance	DO-178B	Level C	All
				006-B0172-01 Rev. ()
				except
				006-B0172-01 Rev. A
	RTCA DO-254 Compliance	DO-254	Level C	(v1.00)
				through
				006-B0172-01 Rev. U
				(v5.01)
				006-B0172-01 Rev. A
				(v1.00)
	RTCA DO-178B Compliance	DO-178B	Level D	through
				006-B0172-01 Rev. U
				(v5.01)
.

NOTES

1.Complies with ICAO Annex 10, Amendment 77 Tables: 2-64, 2-80, 2-96 functionality only when the Enhanced Surveillance function is enabled during configuration (refer to Section 3.7.1).

2.Complies with TSO-C166a/ETSO-C166a functionality only when the Extended Squitter function is enabled during configuration (refer to Section 3.7.1).

3.Complies with TSO-C166b functionality only when the Extended Squitter function is enabled during configuraton (Section 3.7.1).

4.Software versions prior to 006-B0172-01 Rev. Z (v6.20) are not applicable to the GTX 33H/33DH.

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Page 1-10	Rev. H

1.9.2TSO/ETSO Deviations

Table 1-6 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.
	TSO-C112	2. Garmin was granted a deviation from TSO-C112 to use RTCA DO-160D instead of RTCA DO-160B.
		3.	Garmin was granted a deviation from TSO-C112 to use RTCA DO-181C instead of RTCA DO-181.
		1.	Garmin was granted a deviation from DO-160D, section 20.3.d.
	ETSO-2C112a
		2. Garmin was granted a deviation from ED-73B, section 1.4.2.2 to mark the equipment's functionallevel on the
		chassis in a location not visible when the transponder is mounted in the aircraft.
	TSO-C166a	1. Garmin was granted a deviation from TSO-C166a to use RTCA DO-160D instead of RTCA DO-160E.
		1.	Garmin was granted a deviation from ETSO-C166a to use RTCA/DO-160D instead of RTCA/DO160E as
	ETSO-C166a	the standard for Environmental Conditions and Test Procedures for Airborne Equipment.
		2. Garmin was granted a deviation from ETSO-C166a, section 4.1 and 4.2 to reference the installation manual
		for the equipment's ETSO compliance and class for this ETSO.
		1.	Garmin was granted a deviation from TSO-C166b to meet the transponder function requirements of RTCA
	TSO-C166b	DO-181C instead of RTCA DO-181D.
		2.	Garmin was granted a deviation from TSO-C166b to use RTCA DO-160C instead of the latest revision of
		RTCA DO-160.

1.10Operating Instructions

For operating instructions, see Section 3.7.3 of this document. Ident Function:

Selecting the Ident function sends an ID indication to ATC for 18 seconds. This ID indication distinguishes your transponder from all others on the air traffic controller’s radar screen.

NOTE

For GX000 installations, refer to the applicable airframe specific pilot’s guide documentation for operating instructions (available at www.garmin.com).

190-00906-00	GTX 33 Installation Manual
Rev. H	Page 1-11

1.11 Reference Documents

The following publications are sources of additional information for installing the GTX 33. Before installing the unit, the technician should read all relevant referenced materials along with this manual.

Table 1-7. GTX 33 Reference Documents

Part Number		Document
190-00303-00	G1000	System Installation Manual
190-00303-04	G1000	Line Maintenance and Configuration Manual
560-1025-07	MX20 MFD Installation Manual
190-00607-04	GMX 200 Installation Manual
560-0982-01	GNS 480 (CNX80) Installation Manual
190-01004-02	GTN 625/635/650 TSO Installation Manual
190-01007-02	GTN 725/750 TSO Installation Manual

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Page 1-12	Rev. H

2 INSTALLATION OVERVIEW

2.1 Introduction

This section provides hardware equipment information for installing the GTX 33 Mode S Transponder, related hardware and optional accessories. Installation of the GTX 33 should follow the data detailed in this manual. Cabling is fabricated by the installing agency to fit each particular aircraft. The guidance of FAA advisory circulars AC 43.13-1B and AC 43.13-2B, where applicable, may be found useful for making retro-fit installations that comply with FAA regulations.

Refer to the G1000 System Installation Manual, Garmin part number 190-00303-00 for further details on the mechanical aspects of the G1000 system rack. For installation in an aircraft using the remote mounted stand-alone rack refer to Appendix C for rack drawings and dimensions.

2.2 Installation Materials

The GTX 33 is available as a single unit under the following part numbers:

Table 2-1. GTX 33 Part Numbers

Item	Catalog Part Number	Diversity
GTX 33, Unit Only, (011-00779-00)	010-00267-00	No
GTX 33 and Install Kit, (011-00779-00)	010-00267-01	No
GTX 33D, Unit Only (011-00779-01)	010-00294-00	Yes
GTX 33D and Install Kit (011-00779-01)	010-00294-01	Yes
GTX 33, Unit Only (011-00779-10)	010-00267-10	No
GTX 33 and Install Kit (011-00779-10)	010-00267-11	No
GTX 33 w/ ES, Unit Only, (011-00779-20)	010-00267-20	No
GTX 33 w/ ES and Install Kit, (011-00779-20)	010-00267-21	No
GTX 33D w/ ES, Unit Only, (011-00779-21)	010-00294-20	Yes
GTX 33D w/ ES and Install Kit, (011-00779-21)	010-00294-21	Yes
GTX 33 w/ ES, Unit Only, (011-00779-30)	010-00267-30	No
GTX 33 w/ ES and Install Kit, (011-00779-30)	010-00267-31	No
GTX 33DH, Unit Only, (011-00779-41)	010-00294-40	Yes
GTX 33DH and Install Kit, (011-00779-41)	010-00294-41	Yes
GTX 33H, Unit Only (011-00779-50)	010-00267-50	No
GTX 33H and Install Kit (011-00779-50)	010-00267-51	No
GTX 33DH w/ ES, Unit Only, (011-00779-61)	010-00294-60	Yes
GTX 33DH w/ ES and Install Kit, (011-00779-61)	010-00294-61	Yes
GTX 33H w/ ES, Unit Only (011-00779-70)	010-00267-70	No
GTX 33H w/ ES and Install Kit (011-00779-70)	010-00267-71	No

190-00906-00	GTX 33 Installation Manual
Rev. H	Page 2-1

2.2.1Equipment Available

Each of the following accessories is provided separately for the GTX 33 unit. Either rack and the remainder of the accessories is required for installation.

	Table 2-2. GTX 33 Accessories
	Item	Garmin Catalog Part Number
	Modular Install Rack, GTX 33/GTX 33D	115-00438-00
		(For use with GTX 33 and GTX 33D)
		011-00915-01 (preferred)
	G1000 Nutplate Kit	or
		011-01148-01
	Or
	GTX 33/GTX 33D Stand-Alone Install Rack	115-00629-00
	(Alternate Configuration)	(For use with GTX 33 and GTX 33D)
	Or
	GTX 33H/GTX 33DH Stand-Alone Install Rack	011-02422-00
		(For use with GTX 33H and GTX 33DH)
	Connector Kit, GTX 33	011-01012-01 (Shield Block)
	Back-plate Assembly, GTX 33	011-00582-00
		(For use with GTX 33)
	Back-plate Assembly, w/TNC, GTX 33	011-00582-04
		(For use with GTX 33)
	Back-plate Assembly, GTX 33D	011-00582-01
		(For use with GTX 33D)
	Back-plate Assembly, w/TNC, GTX 33D	011-00582-05
		(For use with GTX 33D)
	Back-plate Assembly, GTX 33H	011-00582-02
		(For use with GTX 33H)
	Back-plate Assembly, GTX 33DH	011-00582-03
		(For use with GTX 33DH)
	Garmin Transponder Antenna kit*	010-10160-00
	(two required for diversity)
	*Note: A transponder antenna approved to TSO C66( ) or	C74( ) that has been installed to meet the
	requirements of this manual may be used with the GTX 33.

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