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Garmin GTX 320A

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Comments to date: 4. Page 1 of 1. Average Rating:
lazlock 4:26am on Sunday, October 3rd, 2010 
I bought this as a gift for my dad last year - he loves it and uses it all the time. Often he gets lost in his thoughts or misses a turn.
hollandryan 10:18pm on Thursday, May 13th, 2010 
SAME AS YOU HAVE READ, SLOW TO FIND SATELLITES, THE AUSTRALIA MAP SOFEWERE IS VERY HARD TO WORK OUT, TO MANY CODES. SAME AS YOU HAVE READ, SLOW TO FIND SATELLITES, THE AUSTRALIA MAP SOFEWERE IS VERY HARD TO WORK OUT, TO MANY CODES.
deathwalk 2:02pm on Wednesday, April 21st, 2010 
Very poor at aquring satellites Recently bought one of these based on the rave reviews here. Just does the job !! Product arrived got it out the box and has worked perfectly. First Rate I have had this unit for a few weeks now and I am very pleased with it. Easy to use as others have said.
mike73hj 3:47am on Friday, March 19th, 2010 
Dead simple to use, easy-to-understand voice, clear display vacuum-lever base may not stick to dashboard Easy to use for the technology challenged Memory card was too small

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Documents

doc0

GTX 320/320A

Transponder Installation Manual

190-00133-01

July, 2006

Revision M

Copyright 1999-2006 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: 913-397-8200 Aviation Dealer Technical Support Line (Toll Free): (888) 606-5482 www.garmin.com Garmin (Europe) Ltd. Unit 5, The Quadrangle Abbey Park Industrial Estate Romsey, SO51 9DL U.K. 44/0870.851241
RECORD OF REVISIONS Revision Revision Date
A B C D E F G H J K L M 02/10/97 05/30/97 07/08/97 08/21/97 09/18/97 01/23/98 06/05/98 05/14/99 09/25/00 11/05/01 06/06/02 07/14/06

Description

Initial Rel Clarify Antenna Requirements Lengthens Mount Screws, Add Notes Depth Behind Panel Wiring Diagram Corrections Add Spring Washer Correct reference to 50 ohm match bushing Updates and Corrections Redraw Updates and Clarifications Updated unit and accessory part numbers Corrected date on front cover and misc updates

--40373

Page A Rev. M
GTX 320/320A Installation Manual 190-00133-01
DOCUMENT PAGINATION Section
Table of Contents Section 1 Section 2 Section 3 Appendix A Appendix B Appendix C

Page Range

iii vi 1-1 1-4 2-1 2-10 3-1 3-4 A-1 A-8 B-1 B-2 C-1 C-16
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 of the United States without first obtaining an export license. A violation of the EAR may be 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.

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.

Page i Rev M

TABLE OF CONTENTS
PARAGRAPH 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 2. 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 PAGE
GENERAL DESCRIPTION.... 1-1 Introduction..... 1-1 Equipment Description..... 1-1 Technical Specifications.... 1-1 Equipment Available.... 1-2 Additional Equipment Required.... 1-3 Installation Approval.... 1-3 ATC Transponder Tests and Inspections... 1-3 Limited Warranty.... 1-4 INSTALLATION OVERVIEW.... 2-1 Introduction..... 2-1 Unpacking and Inspecting Equipment.... 2-1 Antenna Installation.... 2-1 GTX 320/320A Installation.... 2-5 Electrical Connections.... 2-6 Check Existing Coax and Antenna Before Using a GTX320/320A Adapter. 2-8 Installation Using Existing Narco AT 150 Installation Rack.. 2-8 Installation Using Existing Bendix/King 76A/78A Installation Rack... 2-9
3. POST INSTALLATION CONFIGURATION & CHECKOUT PROCEDURE.. 3-1 3.1 Aircraft Station Licensing Requirements... 3-1 3.2 Operation.... 3-1

PARAGRAPH

APPENDIX A, CERTIFICATION DOCUMENTS... A-1 A.1 Continued Airworthiness.... A-1 A.2 Environmental Qualification Form - (GTX 320).... A-4 A.3 Environmental Qualification Form - (GTX 320A)... A-6 APPENDIX B, STC PERMISSION-GTX 320....B-1 APPENDIX C, ASSEMBLY AND INSTALLATION DRAWINGS..C-1

Page ii Rev M

LIST OF ILLUSTRATIONS
FIGURE 2-1 2-2 3-1 C-1 C-2 C-3 C-4 C-5 C-6 C-7 PAGE
BNC Connector Assembly Drawing.... 2-Pin D-Sub Connector Drawing.... 2-7 Transponder Front Panel (GTX 320 Shown)... 3-1 GTX 320/320A Outline Drawing....C-3 GTX 320/320A Connector/Rack Kit Assembly Drawing...C-5 GTX 320/320A Recommended Panel Cutout Dimensions...C-7 GTX 320/320A Interconnect Wiring Diagram....C-9 GTX 320/320A Dual Transponder Interconnect Wiring Diagram..C-11 Narco AT 150 Installation Adapter Assembly Drawing...C-13 King KT 76A/78A Installation Adapter Assembly Drawing...C-15

LIST OF TABLES

TABLE 1-1 1-2 1-3 1-4 1-5 2-1 2-2 2-3 2-4 A-1 A-2 PAGE
Transponder Specifications.... 1-1 GTX 320 Physical Characteristics.... 1-2 GTX 320A Physical Characteristics... 1-2 Available Configurations.... 1-2 Available Installation Accessories.... 1-3 Antenna Coax Cable, Vendor & Type.... 2-3 Pin Contact Part Numbers..... 2-6 Recommended Crimp Tools.... 2-Pin D-Sub Pin-Out Definitions.... 2-7 Environmental Qualification Form GTX 320.... A-4 Environmental Qualification Form GTX 320A... A-6

Page iii Rev M

GTX 320 HARDWARE MOD LEVEL HISTORY
The following table identifies hardware modification (Mod) Levels for the GTX 320 Transponder. 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 Dealer Resource web site at www.garmin.com using their Garmin-provided user name and password.

MOD LEVEL 1 2

SERVICE BULLETIN NUMBER NA 9805
SERVICE BULLETIN DATE NA 10-30-1998

PURPOSE OF MODIFICATION

Initial Release Incorporates new circuitry in power supply
GTX 320A HARDWARE MOD LEVEL HISTORY
The following table identifies hardware modification (Mod) Levels for the GTX 320A Transponder. 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 Dealer Resource web site at www.garmin.com using their Garmin-provided user name and password.

MOD LEVEL

SERVICE BULLETIN NUMBER

SERVICE BULLETIN DATE

Page iv Rev M
GENERAL DESCRIPTION Introduction
This manual provides the installation and operating instructions for the Garmin GTX 320 and the GTX 320A Transponders. Information pertaining to the maintenance, alignment, and procurement of replacement parts is found in the GTX 320 Maintenance Manual, P/N 190-00133-02 and the GTX 320A Maintenance Manual, P/N 190-00133-08. After installation of the GTX 320/ GTX 320A, FAA Form 337 must be completed by an appropriately certificated agency and ATC transponder tests required by 14 CFR, Part 91.413 must be completed to return the aircraft to service.

Equipment Description

The Garmin GTX 320/320A Transponder is a radio transmitter and receiver that operates on radar frequencies. Receiving ground radar interrogations at 1030 MHz, it transmits a coded response of pulses to ground-based radar on a frequency of 1090 MHz. As with other Mode A/Mode C transponders, the GTX 320/320A replies with any one of 4,096 codes, which differ in the position and number of pulses transmitted. By replying to ground transmissions, your GTX 320/320A enables ATC computers to display aircraft identification, altitude and ground speed on ATC radar screens. The GTX 320/320A is equipped with IDENT capability that activates the Special Position Identification Pulse (SPI) for approximately 20 seconds (18 seconds for the GTX 320A) identifying your transponder return from other aircraft on the controllers scope.

1.3 1.3.1

Technical Specifications Transponder Specifications
Table 1-1 Transponder Specifications

Characteristic

TSO C74c Class 1A, JSTO C74C Class 1A (A1D1)-CA(BMN)XXXXXXZBABAUZXXXXXX GTX 320: FAA TSO C74c; RTCA DO-160C, JTSO C74c GTX 320A: FAA TSO C74c; RTCA DO-160D, JTSO C74c -20 C to +55 C (Continuous Operation) GTX 320: 14/28 VDC: 12 Watts Max. GTX 320A: 14/28 VDC: 20 Watts Max. 95% @ +55 C for 16 Hours; 85% @ +38 C for 32 Hours 50,000 Feet 1090 MHz 125 Watts minimum, 150 Watts nominal at the antenna with 1.5 dB coaxial cable loss at 1090 MHz 1030 MHz GTX 320: -72 dBm Nominal for 90% replies GTX 320A: -74 dBm Nominal for 90% replies 4096 Identification Codes 100 Foot Increments from -1000 to 63,000 Feet Low 0.5 V; High 8 V

Specification

TSO, JTSO TSO ENV CAT Applicable Documents Temperature Range Power Requirements Humidity Altitude Transmitter Frequency Transmitter Power Receiver Frequency Receiver Sensitivity Mode A Capability Mode C Capability External Suppression Input

Page 1-1 Rev M

Physical Characteristics-GTX 320
Table 1-2 GTX 320 Physical Characteristics
Bezel Height Bezel Width Rack Height (Dimple to Dimple) Rack Width Depth Behind Panel with Connectors (measured from face of aircraft panel to rear of connector backshells) Weight (Unit Only) Weight (Installed with rack and connectors)
1.63 inches (41 mm) 6.25 inches (159 mm) 1.71 inches (43 mm) 6.30 inches (160 mm) 8.78 inches (223 mm) 1.7 lbs. (0.8 kg) 2.3 lbs. (1.1 kg)
Physical Characteristics-GTX 320A
Table 1-3 GTX 320A Physical Characteristics
1.63 inches (41 mm) 6.25 inches (159 mm) 1.71 inches (43 mm) 6.30 inches (160 mm) 8.78 inches (223 mm) 2.3 lbs. (1.1 kg) 2.9 lbs. (1.3 kg)

1.4 1.4.1

Equipment Available Available Configurations
Table 1-4 Available Configurations
Garmin GTX 320 Transponder Garmin GTX 320A Transponder Garmin GTX 320 Transponder includes Garmin installation kit, P/N 010-10161-00 Garmin GTX 320A Transponder includes Garmin installation kit, P/N 010-10161-01

Garmin P/N

010-00135-00 010-00247-00 010-00135-03 010-00247-02

Page 1-2 Rev M

Installation Accessories
Table 1-5 Available Installation Accessories
Mounting Rack Connector Kit Rear Backplate Mounting Rack, Rear Backplate and Connector Kit (Includes 115-00285-00, 011-00677-01 and 011-00651-01) Garmin GTX 320/320A Narco Adapter Garmin GTX 320/320A KT76A Adapter Garmin GTX 320/320A Antenna kit*
115-00285-00 011-00651-01 011-00677-01 010-10161-01 010-10158-00 010-10159-00 010-10160-00
* A transponder antenna approved to TSO C66( ) or C74( ) that has been installed to meet the requirements of this manual may be approved for use with the GTX 320/320A.
Additional Equipment Required
Antenna Sealant - Use antenna manufacturers instructions, install according to FAA AC 43.13-2A. Cables - The installer will supply all system cables. Cable requirements and fabrication is detailed in Section 2 of this manual. Hardware - #6 Flat Head Screw (6 ea.) and #6-32 Self Locking Nut (6 ea.). Hardware required to mount installation rack is not provided.

Installation Approval

The conditions and tests required for TSO approval of the GTX 320/320A Transponder and antenna are minimum performance standards. It is the responsibility of the installer to determine that the aircraft installation standards for a specific type or class of aircraft are in compliance with all applicable TSO requirements. The GTX 320/320A and antenna may be installed only if further evaluation by the applicant documents an acceptable installation and is approved by the administrator. For GTX 320/320A TSO compliance, see Appendix A. For antenna TSO compliance, refer to antenna manufacturers literature.
ATC Transponder Tests and Inspections
The ATC transponder tests required by 14 CFR, Part 91.413 may be conducted using a bench check or portable test equipment and must meet the requirements prescribed in Part 43 Appendix F. If portable test equipment with appropriate coupling to the aircraft antenna system is used, operate the test equipment for ATCRBS transponders at a nominal rate of 235 interrogations per second to avoid possible ATCRBS interference. An additional 3 dB loss is allowed to compensate for antenna coupling errors during receiver sensitivity measurements conducted in accordance with Part 43 Appendix F, Paragraph (c)(1) when using portable test equipment.

Page 1-3 Rev M

Limited Warranty
This Garmin product is warranted to be free from defects in materials or workmanship for two years from the date of purchase. Within this 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 cover failures due to abuse, misuse, accident or unauthorized alteration or repairs. THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR 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 THIS 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 the unit 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. To obtain warranty service, contact your local Garmin Authorized Service Center. For assistance in locating a Service Center near you, call Garmin Customer Service at one of the numbers shown below. Products sold through online auctions are not eligible for rebates or other special offers from Garmin. 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. Garmin International, Inc. 1200 East 151st Street Olathe, Kansas 66062, U.S.A. Phone: 913/397.8200 FAX: 913/397.8282 Garmin (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate Romsey, SO51 9DL, U.K. Phone: 44/0870.851241 FAX: 44/0870.851251

Page 1-4 Rev M

INSTALLATION OVERVIEW Introduction
This section provides the necessary information for installing the GTX 320/320A Transponders, and where required, optional accessories. Installation of the GTX 320/320A Transponder should comply with the aircraft Type Certificate (TC) or Supplemental Type Certificate (STC). Cabling will be fabricated by the installing agency to fit each particular aircraft. The guidance of FAA advisory circulars AC 43.13-1B and AC 43.13-2A, where applicable, may be found useful for accomplishing retro-fit installations that comply with FAA regulations. This section contains interconnect diagrams, mounting dimensions, and information pertaining to installation.
Unpacking and Inspecting Equipment
Carefully unpack the equipment and make a visual inspection of the unit for evidence of damage incurred during shipment. If the unit is damaged, notify the carrier and file a claim. To justify a claim, save the original shipping container and all packing materials. Do not return the unit to Garmin until the carrier has authorized the claim. Retain the original shipping containers for storage. If the original containers are not available, a separate cardboard container should be prepared that is large enough to accommodate sufficient packing material to prevent movement.

Antenna Installation

2.3.1 Location Considerations
A. The antenna (Garmin P/N 010-10160-00) should be well removed from any major protrusions, the engine(s), propeller(s), and antenna masts. It should also be as far removed as practical from landing gear doors, access doors, or other openings that could alter its radiation pattern. The antenna should be mounted on the underside of the aircraft and in a vertical position (relative to the position of the aircraft in level flight). Avoid mounting the antenna within three feet of the ADF sense antenna or any other communication antenna and six feet from the DME antenna. To prevent RF interference, the antenna must be mounted a minimum distance of three feet from the GTX 320/320A.
If the antenna is being installed on a composite aircraft, ground planes may be required. Conductive wire mesh, radials, or thin aluminum sheets embedded in the composite material provide the proper ground plane allowing the antenna pattern (gain) to be maximized for optimum transponder performance.
2.3.2 Antenna Installation
Install the antenna according to the antenna manufacturers instructions and FAA AC 43.13-2A.

Page 2-1 Rev M

2.3.3 Installation Approval Considerations for Pressurized Aircraft

Antenna and cable installations on pressurized cabin aircraft require FAA approved installation design and engineering substantiation data whenever such installations incorporate alteration (penetration) of the cabin pressure vessel by connector holes and/or mounting arrangements. For needed engineering support pertaining to the design and approval of such pressurized aircraft antenna installations, it is recommended that the installer proceed according to any of the following listed alternatives: 1. Obtain approved antenna installation design data from the aircraft manufacturer. 2. Obtain an FAA approved Supplemental Type Certificate (STC) pertaining to and valid for the subject antenna installation. 3. Contact the FAA Aircraft Certification Office in the appropriate Region and request identification of FAA Designated Engineering Representatives (DERs) who are authorized to prepare and approve the required antenna installation engineering data. 4. Obtain FAA Advisory Circular AC-183C and select (and contact) a DER from the roster of individuals identified there under. 5. Contact an aviation industry organization such as the Aircraft Electronics Association and request their assistance.

Page 2-2 Rev M

2.3.4 Antenna Cable Installation
When routing antenna cables, observe the following precautions: All cable routing should be kept as short as possible and as direct as possible. Avoid sharp bends. Avoid routing cables near power sources (e.g., 400 Hz generators, trim motors, etc.) or near power for fluorescent lighting. Avoid routing cable near ADF antenna cable (allow at least a 12-inch separation). The table below lists the recommended 50 ohm double shielded coax antenna cable vendor and the type to be used for specific lengths of cable. Adherence to this table will ensure that the coax installation will not exceed the maximum allowable 1.5 dB attenuation at the transmitter operating frequency of 1090 MHz. Table 2-1 Antenna Coax Cable, Vendor & Type

Max. Length (feet)

8.8 10.0 12.5 17.0 21.0 27.0 41.0 Supplier Information

ECS Type

MIL-C-17 Type

M17/128

RG Type

RG400 RG304 RG393

3C142B Vendor: Electronic Cable Specialists 5300 W. Franklin Drive Franklin, WI 53132 Tel: 800-327-9473 414-421-5300 Fax: 414-421-5301 M17/112 M17/127
MIL-C-17 types: See current issue of Qualified Products List QPL-17.
RG types: See current issue of Qualified Products List QPL-17.
2.3.5 Antenna Cable Connectors
One of two rack connectors is provided (item 6 or 12 in the installation drawing, figure B2). RF Adapter item 12 (P/N 330-00326-00) requires the cable to be terminated to an appropriate type BNC plug (provided by installer), which is then attached to item 12. Any 50 ohm, double shielded cable may be used, provided it introduces less than 1.5 dB attenuation at 1 GHz including the connector. Connector item 6 (P/N 330-00198-00) requires the cable to be terminated directly to it and can accommodate only M17/128 (RG-400) cable. The completed cable including connectors must introduce no more than 1.5 dB attenuation at 1 GHz. Instructions for installing the item 6 are shown in Figure 2-1 and detailed in the following steps A-G.

Page 2-3 Rev M

Figure 2-1 BNC Connector Assembly Drawing A. B. C. Trim coax outer insulation back 0.50" Trim braid (not center conductor or insulation) back 0.25". Strip Insulation back 0.120".
Place the ferrule over the coax braid, flush against the coax outer insulation before performing the next step if the outside diameter of the coax braid is smaller than the inside diameter of the center connector sidewall opening. D. Insert cable (center conductor, dielectric and shield braid) through the sidewall of the connector and solder the center conductor to the center pin of the connector.
When using low loss cable it may be necessary to flatten the solid wire center conductor slightly so it can fit the slot on the RF connector center pin. When soldering, avoid applying excess heat to the connector body, and center conductor insulator. E. F. G. Heat the outside of the connector sleeve and at the same time apply solder between the braid and the sleeve. Continue to apply heat until the solder flows evenly. Install 50 Matching Bushing.
Insert connector cap and tack solder in two places.

Page 2-4 Rev M

GTX 320/320A Installation NOTES
Avoid installing the unit near heat sources. If this is not possible, ensure that additional cooling is provided. Allow adequate space for installation of cables and connectors. The installer will supply and fabricate all of the cables. All wiring must be in accordance with FAA AC 43.13-2A. GTX 320 units that are at Mod Level 1 must use the Mod Level 1 Rack Assembly. After Mod Level 1, GTX 320 installations are 0.170" (4.31 mm) deeper in the panel. A. Assemble the connector/rack kit according to figure B2. Install the rack assembly according to the dimensions given in figures B1. Mounting brackets are not supplied due to the wide range of mounting configurations available. Suitable mounting brackets may be fabricated from sheet metal or angle stock. To ensure a sturdy mount, rear support for the unit should be provided. Do not insert screws through the rear plate of the mounting tray, into the transponder. These holes are only for use with the adapter described in paragraph 2.8. Looking at the bottom of the transponder, make sure the front lobe of the locking mechanism is in a vertical position. This can be accomplished by using a 3/32" Allen wrench through the face plate. Slide the unit into the rack until the front lobe of the unit touches the rack. Guide pins on the back plate will help in the proper alignment of the unit in the rack. Turn the Allen wrench clockwise until unit is secured in the rack. Continue turning until tight. Do not overtighten the screw. To remove the unit from the rack, turn the 3/32" Allen wrench counterclockwise until it disengages from the rack.

Page 2-8 Rev M

Installation Using Existing Bendix/King KT 76A/78A Installation Rack
The GTX 320 and GTX 320A can be used with an existing Bendix/King KT 76A/78A installation rack by using the KT 76A/78A Installation Adapter (P/N 011-00289-00). See figure B7 for the Bendix/King KT 76A/78A Adapter assembly drawing.
GTX 320 units that are at Mod Level 1 must use the Mod Level 1 Bendix/King KT 76A/78A Installation Adapter. After Mod Level 1, the GTX 320 sits 0.17" (4.3 mm) closer to the instrument panel. Also, when installing the GTX 320 in an existing Bendix/King KT 76A/78A rack (using the KT 76A/78A Adapter) and when the aircraft has a bus voltage of +28 VDC, make sure the +28 VDC dropping resistor is bypassed. A. Attach the KT 76A/78A installation adapter to the rear of the GTX 320 using the two captive screws on the adapter. Looking at the bottom of the transponder, make sure the front lobe of the locking mechanism is in a vertical position. This can be accomplished by using a 3/32" Allen wrench through the face plate. Slide the unit into the rack until the front lobe of the unit touches the rack. Guide pins on the back plate will help in the proper alignment of the unit in the rack. Turn the Allen wrench clockwise until unit is secured in the rack. Continue turning until tight. Do not overtighten the screw. To remove the unit from the rack, turn the 3/32" Allen wrench counterclockwise until it disengages from the rack.

Page 2-9 Rev M

Blank Page

Page 2-10 Rev M

POST INSTALLATION CONFIGURATION & CHECKOUT PROCEDURE 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. At the present time, you do not need an individual license to operate the GTX 320/320A aboard your private aircraft in many circumstances. To find out the specific details on whether you are exempt from licensing, please see FCC Fact Sheet PR 5000 or contact the FCC at (800)-322-1117. If an aircraft license is required or desired, contact the FCC at (800)-322-1117 to request form 404, Application for Aircraft Radio Station License. The FCC also has a fax-on-demand service to provide forms by fax at (202)-418-0177. The GTX 320/320A owner accepts all responsibility for obtaining the proper licensing before using the transponder.

Page 3-2 Rev M

IDENT Button
On occasion, the controller will request SQUAWK IDENT. Respond by momentarily pressing and releasing the IDENT button. Pressing the IDENT button activates the Special Position Identification Pulse (SPI) for approximately 20 seconds identifying your transponder return from other aircraft on the controllers scope.

3.2.4 Reply Light

The reply light will blink each time the transponder replies to ground interrogation. The reply light also remains lit during the IDENT time interval.

Page 3-3 Rev M

Page 3-4 Rev M
APPENDIX A CERTIFICATION DOCUMENTS

Continued Airworthiness

Other than for regulatory periodic functional checks, maintenance of the GTX 320/320A is on condition only. Refer to the GTX 320 and GTX 320A Maintenance Manuals. Periodic maintenance of the GTX 320/320A is not required. This section provides assistance to the installing agency in preparing Instructions for Continued Airworthiness (ICA) in response to Bulletin Number HBAW 98-18, Checklist for Instructions for Continued Airworthiness for Major Alterations Approved Under the Field Approval Process, effective 10/7/98. Aviation Authority approved installers are hereby granted permission to reference appropriate service instructions and excerpts from this Installation Manual to accomplish the Instructions for Continued Airworthiness. This permission does not construe suitability of the documents. It is the applicants responsibility to determine the suitability of the documents for the ICA. Following is a suggested ICA for a Garmin GTX 320/320A unit installation. Some of the checklist items do not apply, in which case they should be marked N/A (Not Applicable). Instructions For Continued Airworthiness, Garmin GTX 320/320A 1. Introduction [Aircraft that has been altered: Registration (N-) number, Make, Model and Serial Number] Content, Scope, Purpose and Arrangement: This document identifies the Instructions for Continued Airworthiness for the modification of the above aircraft by installation of a Garmin GTX 320/320A. Applicability: Applies to aircraft altered by installation of the Garmin GTX 320/320A. Definitions/Abbreviations: None, N/A. Precautions: None, N/A. Units of Measurement: None, N/A. Referenced Publications: Garmin GTX 320/320A Installation Manual, P/N 190-00133-01 Garmin GTX 320 Maintenance Manual, P/N 190-00133-02 Garmin GTX 320A Maintenance Manual, P/N 190-00133-08 Garmin STC # [applicable STC number for the specific model installed, refer to Appendix B of this manual]. Garmin GTX 320/320A Pilots Guide, P/N 190-00133-09. Distribution: This document should be a permanent aircraft record. 2. Description of the Alteration Installation of the Garmin GTX 320/320A, with interface to Encoding Altimeter or Blind Encoder. Refer to section 2.4 and Appendix B of this manual for interconnect information. Antenna installation, removal and replacement should be in accordance with applicable provisions of AC43.13-1B and 43.13-2A.

Page A-1 Rev M

3. Control, Operation Information
Refer to the GTX 320/320A Pilots Guide.

4. Servicing Information

5. Maintenance Instructions
Maintenance of the GTX 320/320A is on condition only. Periodic maintenance is not required. Refer to the GTX 320 and the 320A Series Maintenance Manuals.
6. Troubleshooting Information
Refer to the GTX 320 and the GTX 320A Maintenance Manuals.
7. Removal and Replacement Information
Refer to section 2.4 of this manual. If the unit is removed and reinstalled, a functional check of the equipment should be conducted in accordance with section 3.2 of this manual.

8. Diagrams

Refer to Appendix B of this manual.
9. Special Inspection Requirements N/A 10. Application of Protective Treatments N/A
11. Data: Relative to Structural Fasteners
Antenna installation, removal and replacement should be in accordance with applicable provisions of AC43.13-1A and 43.13-2A. Also, refer to section 2.3 of this manual.
12. Special Tools N/A 13. This Section is for Commuter Category Aircraft Only A. Electrical loads: Refer to section 1.3 of this manual.
B. Methods of balancing flight controls: N/A. C. Identification of primary and secondary structures: N/A. D. Special repair methods applicable to the airplane: Antenna installation, removal, and replacement should be in accordance with applicable provisions of AC43.13-1B and 43.13-2A.

14. Overhaul Period

No additional overhaul time limitations.
15. Airworthiness Limitation Section

Page A-2 Rev M

16. Revision
To revise this ICA, a letter must be submitted to the local FSDO with a copy of the revised FAA Form 337, and revised ICA. The FAA inspector accepts the change by signing Block 3 and including the following statement: The attached revised/new Instructions for Continued Airworthiness (date ______) for the above aircraft or component major alteration have been accepted by the FAA, superseding the Instructions for Continued Airworthiness (date ______).

17. Assistance

Flight Standards Inspectors have the resources to respond to questions regarding the ICA.
Implementation and Record Keeping
For major alterations performed in accordance with FAA field approval policy, the owner/operator operating under Part 91 is responsible for ensuring that the ICA is made part of the applicable section 91.409 inspection program for their aircraft. This is accomplished when a maintenance entry is made in the aircrafts maintenance record in accordance with section 43.9. This entry records the major alteration and identifies the original ICA location (e.g., Block 8 of FAA Form 337, dated ______) along with a statement that the ICA is now part of the aircrafts inspection/maintenance requirements.

Page A-3 Rev M

Environmental Qualification Form (GTX 320)
GTX 320 Airborne ATC Transponder Equipment TSO - C74c Class 1A

NOMENCLATURE:

TYPE/MODEL/PART NO.: 010-00135-00/10
MANUFACTURER'S SPECIFICATION AND/OR OTHER APPLICABLE SPECIFICATION: 004-00042-00 MANUFACTURER: ADDRESS: Garmin International 1200 E 151st St, Olathe, Kansas 66062
Table A-1 GTX 320 EQF Table

Conditions

Temperature and Altitude Low Temperature High Temperature In-Flight Loss of Cooling Altitude Decompression Overpressure Temperature Variation Humidity Shock Operational Crash Safety Vibration Explosion Waterproofness Fluids Susceptibility

RTCA DO160C Section

4.0 4.5.1 4.5.2. & 4.5.3 4.5.4 4.6.1 4.6.2 4.6.3 5.0 6.0 7.0 7.2 7.3 8.0 9.0 10.0 11.0
Description of Conducted Tests
Equipment tested to Categories A1 & D1 except as noted

Cooling air not required

Equipment tested to Category C Equipment tested to Category A Equipment tested according to DO-160C, Par. 7.2.1
Equipment tested without shock mounts to Categories B, M and N (Table 8-1) Equipment identified as Category X, no test required Equipment identified as Category X, no test required Equipment identified as Category X, no test required
Sand and Dust Fungus Salt Spray Magnetic Effect Power Input Voltage Spike
12.0 13.0 14.0 15.0 16.0 17.0
Equipment identified as Category X, no test required Equipment identified as Category X, no test required Equipment identified as Category X, no test required Equipment tested to Class Z Equipment tested to Category B Equipment tested to Category A

Page A-4 Rev M

Table A-1 GTX 320 EQF Table (continued)
Conditions Audio Frequency Susceptibility Induced Signal Susceptibility Radio Frequency Susceptibility Radio Frequency Emission Lightning Induce Transient Susceptibility Lightning Direct Effects Icing Other Tests Remarks- None
RTCA DO160C Section 18.0 19.0 20.0 21.0 22.0 23.0 24.0
Description of Conducted Tests Equipment tested to Category B Equipment tested to Category A Equipment tested to Category U Equipment tested to Category Z Equipment identified as Category XXXX, no test required Equipment identified as Category X, no test required Equipment identified as Category X, no test required

21.0 22.0 23.0 24.0 25.0

Page A-7 Rev M

Page A-8 Rev M

APPENDIX B STC PERMISSION
Consistent with N8110.69 or Order 8110.4, Aviation Authority approved installations are hereby granted permission to use STC # SA00642WI data to modify aircraft.

Page B-1 Rev M

Page B-2 Rev M
APPENDIX C ASSEMBLY AND INSTALLATION DRAWINGS

C.1 GENERAL

This section contains the following installation drawings:
C-1, GTX 320/320A Outline Drawing C-2, GTX 320/320A Connector/Rack Kit Assembly Drawing C-3, GTX 320/320A Recommended Panel Cutout Dimensions C-4, GTX 320/320A Interconnect Wiring Diagram C-5, Dual Transponder Interconnect Wiring Diagram C-6, Narco AT 150 Installation Adapter Assembly Drawing C-7, King KT 76A/78A Adapter Assembly Drawing

Page C-1 Rev M

Page C-2 Rev M
Figure C-1 GTX 320/320A OUTLINE DRAWING
Page C-3 (Page C-4 blank) Rev M
011-00338-00 CONNECTOR/RACK KIT
ITEM 211-63234-12 212-20014-00 232-00013-01 330-00220-25 330-00184-25 330-00198-00 336-00022-00 336-00023-00 312-00005-05 115-00285-00 SEE NOTE NOT SHOWN NOT SHOWN NOT SHOWN SEE NOTE 125-00032-02 211-60234-06 125-00046-00 234-10002-00 330-00326-00

PART NUMBER

DESCRIPTION SCREW, 4-40X.75, FLHP, SS/P WSHR, FLAT, NON-STD, SS SNAP RING, EXT, 7/16 BACKSHELL, D-SUB, METAL, 25 POS. CONN., D-SUB, MIL CRP, SCKT, 25 CONN, BNC, MALE BLINDMATE CONT. SCKT, MIL CRP, SIZE 20 CONT, SCKT, MIL CRP, SIZE 20-18 TUBING, HT SHRINK INSTALL RACK BACK PLATE SCREW, 4-40X.187, PHP, SS/P NUT PLATE, D-SUB, 25 POSITION SPRING WASHER RF ADAPTER

SEE NOTE

2.3IN.

2 THESE HOLES NOT USED

NOTE: KIT WILL INCLUDE EITHER ITEM 6 OR ITEM 12. REFER TO SECTION 2 FOR ADDITIONAL INFORMATION.
Figure C-2 GTX 320/320A CONNECTOR/RACK KIT ASSEMBLY DRAWING
Page C-5 (Page C-6 blank) Rev M
Figure C-3 GTX 320/320A RECOMMENDED PANEL CUTOUT DIMENSIONS
Page C-7 (Page C-8 blank) Rev M
Figure C-4 GTX 320/320A INTERCONNECT WIRING DIAGRAM

doc1

GARMIN

The GNS 530W is an all-in-one GPS/Nav/Comm solution. It features a WAAS-certified GPS, 2280-channel capacity comm and 200-channel ILS/VOR with localizer and glideslope. High-speed 5 Hz processing makes navigation calculations and map redraw rates five times faster than earlier GNS series navigators. Built-in WAAS navigation capabilities. It is approved to fly LPV glideslope approaches without reference to ground-based navaids of any kind. An advanced 15-channel receiver capable of five position updates per second, GNS 530W meets the FAAs stringent TSO C146a standards for WAAS sole means navigation providing vertical and lateral approach guidance into thousands of U.S. airports previously inaccessible in IFR conditions. GNS 530Ws 5-inch high-contrast display with brilliant colors makes it easy to read and interpret pilot-critical information. Conveniently scan information from wide viewing angles, even in direct sunlight. Integrates built-in terrain and navigation databases. The 530Ws huge Jeppesen database, updated with front-loading data cards, contains location reference for all airports, VORs, NDBs, Intersections, Flight Service Stations, published approaches, SIDs/STARs, Special Use Airspace and geopolitical boundaries. A detailed basemap shows airports, cities, highways, railroads, rivers, lakes, coastlines and more. GNS 530W GPS/NAV/COM..P/N 11-00550.$11,247.00 GNS 530W With Harness (Exper. A/C).P/N 11-06747.$11,942.00 GNS 430W/530W Wiring Harness..P/N 11-06749.$695.00 Navishield 530 Screen Protector.P/N 05-04227..$13.50 Flight Plan Migrator Kit..P/N 11-07592.$418.50 Flight Plan Data Card..P/N 11-07593.$324.00 All-in-one GPS/Nav/Comm solution. It features a WAAS-certified GPS, 2280-channel capacity comm and 200-channel ILS/VOR with localizer and glideslope. High-speed 5 Hz processing makes navigation calculations and map redraw rates five times faster than earlier GNS series navigators. Built-in WAAS navigation capabilities. It is approved to fly LPV glideslope approaches without reference to ground-based navaids of any kind. Featuring an advanced 15-channel receiver capable of five position updates per second, GNS 430W meets the FAAs stringent TSO C146a standards for WAAS sole means navigation providing vertical and lateral approach guidance into thousands of U.S. airports previously inaccessible in IFR conditions. 4-inch high-contrast display with brilliant colors makes it easy to read and interpret pilot-critical information. Conveniently scan information from wide viewing angles, even in direct sunlight. Integrates built-in terrain and navigation databases, providing a clear, concise picture of where you are and where youre heading. The 430Ws huge Jeppesen database, updated with front-loading data cards, contains location reference for all airports, VORs, NDBs, Intersections, Flight Service Stations, published approaches, SIDs/STARs, Special Use Airspace and geopolitical boundaries. GNS 430W GPS/NAV/COM..P/N 11-06748..$7,530.00 GNS 430W with harness (Exper. A/C).P/N 11-06750..$8,225.00 GNS 430W/530W Wiring Harness..P/N 11-06749.$695.00 Navishield 430 Screen Protector.P/N 05-04224..$11.95 Flight Plan Migrator Kit..P/N 11-07592.$418.50 Flight Plan Data Card..P/N 11-07593.$324.00
The Garmin GNS 530W/430W can only be sold over the counter to expermental aircraft (must verify) with harness. For certified aircraft, it must be installed by a Garmin Dealer. Please call 1-800-826-3160 for partner shop location for certified installs. (price of installation not included)

GARMIN GNS 530W

A Level 2 Mode-S transponder with exciting datalink traffic capabilities. Sharing the same keypad & digital display with the popular GTX 327, the GTX 330 adds to the features with an outside air temperature display (temp. input required), altitude monitor with voice audio alert, and density altitude computations (temperature input required). But the real excitement lies in the GTX 330s datalink traffic capabilities through the FAAs Traffic Information Services. GTX 330 promises to deliver effective traffic information to the GA cockpit in busy terminal environments at a fraction of the cost of current traffic systems. The TIS system is available through 124 Mode-S Traffic Control radar sites throughout the U.S. Aircraft within a 60nm (expected to increase to 90+nm) radius of a Mode-S radar site will receive traffic advisories and warnings from ATC via Mode-S datalink, and this info will be displayed on Garmin 400/500 series products. This system will display 8 nearest targets within a 7nm radius and 3,500 feet of the aircraft. Pilots will receive both visual traffic information (via 400/500 series products) and radio alerts of traffic in the area. The GTX 330 meets all requirements of the Mode-S mandate in Europe, which requires Mode-S for IFR traffic by 2003 and all VFR traffic by 2005. GTX 330 will be offered in diversity & non-diversity models to meet the requirements of a variety of aircraft and operations. The GTX 330D (diversity model) is the first panel-mount diversity-model transponder available. 2 year warranty.

The GTX 330 can only be sold over the counter to experimental aircraft owners with a pre-wired harness. Please call 1-800-826-3160 for partner shop location for certified installs. (price of installation not included)
GARMIN GTX 330 MODE S TRANSPONDER
CM WP ME HA AP LG EP CS IN EL AV TO PS BV

GARMIN GNS 430W

Description
GTX-330 Mode S Transponder GTX-330 Mode S Transponder w/ Harness
Part No. Price 11-01252 $3,398.00 11-05893 $3,594.00
With the intro of the GTX 327, Garmin revolutionizes a part of the panel that has been long overlooked. This fullfeatured, TSO certified transponder brings a unique level of functionality and utility to your airplane. Its solid state transmitter provides 200 watts nominal power output and eliminates the need for a cavity tube which will eventually fail and require expensive replacement. And since the GTX 327 design is 100% solid state there is no warm up time, lower power consumption and lower heat emission. All of which translates to a longer service life. Some of the GTX 327 biggest features are the easiest to see. Among them, the easy-riding DSTN Liquid Crystal Display which reverses yellow numbers out of black for optimal viewing. An innovative keypad makes entering a squawk code a snap. And a dedicated VFR button allows for quick and easy 1200/VFR squawking. The GTX 327 also offers two important timing functions. The first screen shows the current time and count up timer. The second indicates flight time and a count down timer. Together they represent a whole new standard in transponder utility. GTX 327 with Harness.. P/N 11-00329.. $1895.00 GTX 327 Transponder only. P/N 11-00342.. $1695.00 The GTX 327 can be sold over the counter to certified & experimental aircraft owners with a pre-wired harness. The GTX 320A is a full featured, compact, panel mounted Class 1A transponder. GTX 320As solid state transmitter provides 200 watts nominal power output eliminating the need for a cavity tube that can degrade with time, fail, or require expensive replacement. 100% solid state also means no warm up time, reduced power consumption and heat for longer service life. Extensive utilization of surface mount technology provides shallow depth and light weight which simplifies installation in the tightest spaces. 14 or 28 volt operation is available without the requirement for external voltage converters or dropping resistors. The GTX 320A fits into existing installations of selected Narco, King transponders using optional adapters for simple, cost-effective upgrading. A single board design allows for ease of serviceability and simple, standard, four-knob tuning. GTX 320A Trannsponder. P/N 11-18965..$1,650.00 GTX 320A With Harness.. P/N 11-18965-K.$1,595.00 Optional Narco Adapter Kit. P/N 11-07720.$269.95 Optional King Adapter Kit. P/N 11-07721.$269.95

The GTX 320A can be sold over the counter to certified & experimental aircraft owners with a pre-wired harness. NOTE: The GTX 330, GTX 327 & GTX 320A DO NOT include an antenna. Experminental Aircraft can order TED Transponder antenna P/N 11-17995 for $18.95 For a quote on complete custom panels for experimental aircraft please emal: avionics@aircraftspruce.com
GARMIN GTX 327 MODE C TRANSPONDER
GARMIN GTX 320A MODE C TRANSPONDER
JEPPESEN INTERACTIVE 530/430 TRAINERS
Computer based training program for the pilot who wants an audio-visual, hands-on way to quickly master the Garmin 530/430 GPS. Windows and Mac compatible. Jeppesen GNS 530/430 Advanced P/N 13-05645.$109.95 Jeppesen GNS 530/430 Interactive.. P/N 13-05644.$159.95 Jeppesen GNS 530/430 Training. P/N 13-05646.$139.95
The GI 102A and GI 106A course deviation indicators (CDI) from Garmin feature rectilinear meter movements, resolver output for GPS interface, and internal GPS mode annunciation & VLOC. Works with the Garmin 430W, 530W, & SL 30. Call For The 102A is VOR/LOC CDI and the 106A is VOR/LOC/GS Special CDI. Size: 3.25w x 3.25h x 4.625d. The GI 102 is designed Price! for VFR use. The GI 106A is designed for IFR installations. GI 102A CDI.P/N 11-18980. $1,753.00 GI 106A CDI.P/N 11-05768. $1,897.00
GARMIN GI 102A & GI 106A CDIS

AIRCRAFT SPRUCE WEST

Prices Subject to Change Without Notice

AIRCRAFT SPRUCE EAST

PEACHTREE CITY, GA (877) 477-7823
CORONA, CA (877) 4-SPRUCE

 

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