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GTX 320/320A Installation Manual 

 

Page 3-1 

190-00133-01  

Rev 

M

3

POST INSTALLATION CONFIGURATION & CHECKOUT PROCEDURE 

3.1

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.

3.2

Operation

NOTE

 

The coverage you can expect from the GTX 320/320A is limited to “line of sight”.  Low altitude or 
aircraft antenna shielding by the aircraft itself may result in reduced range.  Range can be improved 
by climbing to a higher altitude.  It may be possible to minimize antenna shielding by locating the 
antenna where dead spots are only noticed during abnormal flight attitudes. 

Figure 3-1.  Transponder Front Panel (GTX 320 Shown) 

NOTE

The Transponder should be turned off before starting aircraft engine(s). 

Summary of Contents for GTX 320A

Page 1: ...190 00133 01 July 2006 Revision M GTX 320 320A Transponder Installation Manual...

Page 2: ...y 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 Dea...

Page 3: ...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...

Page 4: ...on 2 1 2 4 GTX 320 320A Installation 2 5 2 5 Electrical Connections 2 6 2 6 Check Existing Coax and Antenna Before Using a GTX320 320A Adapter 2 8 2 7 Installation Using Existing Narco AT 150 Installa...

Page 5: ...Dual Transponder Interconnect Wiring Diagram C 11 C 6 Narco AT 150 Installation Adapter Assembly Drawing C 13 C 7 King KT 76A 78A Installation Adapter Assembly Drawing C 15 LIST OF TABLES TABLE PAGE 1...

Page 6: ...ssword MOD LEVEL SERVICE BULLETIN NUMBER SERVICE BULLETIN DATE PURPOSE OF MODIFICATION 1 NA NA Initial Release 2 9805 10 30 1998 Incorporates new circuitry in power supply GTX 320A HARDWARE MOD LEVEL...

Page 7: ...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 Iden...

Page 8: ...320A Physical Characteristics Characteristic Specification Bezel Height 1 63 inches 41 mm Bezel Width 6 25 inches 159 mm Rack Height Dimple to Dimple 1 71 inches 43 mm Rack Width 6 30 inches 160 mm De...

Page 9: ...ons 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 installat...

Page 10: ...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...

Page 11: ...ntainers 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...

Page 12: ...staller 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 Certi...

Page 13: ...5 M17 112 RG304 17 0 311601 M17 127 RG393 21 0 311501 27 0 311201 41 0 310801 Supplier Information Vendor Electronic Cable Specialists 5300 W Franklin Drive Franklin WI 53132 Tel 800 327 9473 414 421...

Page 14: ...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 NOTE When using low loss cable it m...

Page 15: ...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 B Do not insert screws thro...

Page 16: ...nsertion Extraction Tool Positioner Insertion Extraction Tool Military P N M22520 2 01 N A M81969 1 02 M22520 2 08 M81969 1 02 Positronic 9507 9502 11 M81969 1 02 9502 5 M81969 1 02 ITT Cannon 995 000...

Page 17: ...ct 3 Altitude A1 4 Altitude C2 5 Altitude A2 6 Altitude A4 7 Altitude C4 8 External Ident 9 Altitude B1 10 Altitude C1 11 Altitude B2 12 Altitude B4 13 Ground 14 Switched Power Output 15 Aircraft Powe...

Page 18: ...NOTES GTX 320 units that are at Mod Level 1 must use the Mod Level 1 NARCO Installation Adapter After Mod Level 1 the GTX 320 sits 0 17 4 3 mm closer to the instrument panel Also when installing the...

Page 19: ...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 th...

Page 20: ...Page 2 10 GTX 320 320A Installation Manual Rev M 190 00133 01 Blank Page...

Page 21: ...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...

Page 22: ...eacon system Select ON or ALT as late as practical prior to takeoff and to OFF or SBY as soon as practical after completing landing roll unless the change to SBY has been accomplished previously at th...

Page 23: ...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 controll...

Page 24: ...Page 3 4 GTX 320 320A Installation Manual Rev M 190 00133 01 Blank Page...

Page 25: ...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 M...

Page 26: ...l 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...

Page 27: ...istance 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...

Page 28: ...ession 4 6 2 Overpressure 4 6 3 Temperature Variation 5 0 Equipment tested to Category C Humidity 6 0 Equipment tested to Category A Shock 7 0 Equipment tested according to DO 160C Par 7 2 1 Operation...

Page 29: ...ceptibility 19 0 Equipment tested to Category A Radio Frequency Susceptibility 20 0 Equipment tested to Category U Radio Frequency Emission 21 0 Equipment tested to Category Z Lightning Induce Transie...

Page 30: ...4 6 3 Temperature Variation 5 0 Equipment tested to Category C Humidity 6 0 Equipment tested to Category A Shock 7 0 Equipment tested to Category B Vibration 8 0 Equipment tested in each aircraft type...

Page 31: ...Susceptibility 19 0 Equipment tested to Category A Radio Frequency Susceptibility 20 0 Equipment tested for conducted susceptibility to Category T radiated susceptibility to Category T and pulse test...

Page 32: ...Page A 8 GTX 320 320A Installation Manual Rev M 190 00133 01 Blank Page...

Page 33: ...ion Manual Page B 1 190 00133 01 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 d...

Page 34: ...Page B 2 GTX 320 320A Installation Manual Rev M 190 00133 01...

Page 35: ...ation drawings x C 1 GTX 320 320A Outline Drawing x C 2 GTX 320 320A Connector Rack Kit Assembly Drawing x C 3 GTX 320 320A Recommended Panel Cutout Dimensions x C 4 GTX 320 320A Interconnect Wiring D...

Page 36: ...Page C 2 GTX 320 320A Installation Manual Rev M 190 00133 01 Blank Page...

Page 37: ...GTX 320 320A Installation Manual Page C 3 Page C 4 blank 190 00133 01 Rev M Figure C 1 GTX 320 320A OUTLINE DRAWING...

Page 38: ...T PLATE D SUB 25 POSITION 5 330 00184 25 330 00198 00 336 00022 00 336 00023 00 312 00005 05 115 00285 00 125 00032 02 211 60234 06 125 00046 00 234 10002 00 7 9 11 10 NOT SHOWN NOT SHOWN NOT SHOWN 9...

Page 39: ...GTX 320 320A Installation Manual Page C 7 Page C 8 blank 190 00133 01 Rev M Figure C 3 GTX 320 320A RECOMMENDED PANEL CUTOUT DIMENSIONS...

Page 40: ...GTX 320 320A Installation Manual Page C 9 Page C 10 blank 190 00133 01 Rev M Figure C 4 GTX 320 320A INTERCONNECT WIRING DIAGRAM...

Page 41: ...GTX 320 320A Installation Manual Page C 11 Page C 12 blank 190 00133 01 Rev M Figure C 5 GTX 320 320A DUAL TRANSPONDER INTERCONNECT WIRING DIAGRAM...

Page 42: ...GTX 320 320A Installation Manual Page C 13 Page C 14 blank 190 00133 01 Rev M Figure C 6 NARCO AT 150 INSTALLATION ADAPTER ASSEMBLY DRAWING...

Page 43: ...GTX 320 320A Installation Manual Page C 15 Page C 16 blank 190 00133 01 Rev M Figure C 7 KING KT 76A 78A ADAPTER ASSEMBLY DRAWING...

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