Garmin 0037600 Aviation Transponder User Manual 327sec123

Garmin International Inc Aviation Transponder 327sec123

Users Manual

PreliminaryGTX 327 INSTALLATION MANUALGARMIN Corporation1200 E. 151st StreetOlathe, KS 66062Dwg. Number 190-00187-02 Rev. 1Archive Filename: 190-00187-02-01.zipDocument Source: MS WordRev. Date Description of Change ECO #1 10/07/99 Engineering Release ---ConfidentialThis document and the specifications contained hereinare the property of GARMIN Corporation and may notbe reproduced or used in whole or in part as the basisfor manufacturing or sale of products without writtenpermission of GARMIN Corporation.Approvals DateDrawn MD 10/07/99Chkd.Proj. Mgr.Released
PreliminaryGARMIN International, Inc.1200 E. 151st StreetOlathe, KS 66062 USA190-00187-02 Revision 1October 1999*7;,167$//$7,210$18$/
PreliminaryGTX 327 Installation Manual Page A190-00187-02 Rev 1© Copyright 1999GARMIN CorporationAll Rights ReservedExcept as expressly provided below, no part of this manual may be reproduced, copied, transmitted,disseminated, downloaded or stored in any storage medium, for any purpose without the express priorwritten consent of GARMIN Corporation. GARMIN Corporation hereby grants permission to download asingle copy of this manual and of any revision to this manual onto a hard drive or other electronic storagemedium to be viewed and to print one copy of this manual or of any revision hereto, provided that suchelectronic or printed copy of this manual or revision must contain the complete text of this copyright noticeand provided further that any unauthorized commercial distribution of this manual or any revision hereto isstrictly prohibited. GARMIN International, Inc.1200 E. 151st StreetOlathe, KS 66062 USATelephone: 913-397-8200Dealer Line: 1-800-800-1420Web Site Address: www.garmin.comRECORD OF REVISIONSRevision RevisionDate Description ECO #1 10/07/99 Engineering Release ----
PreliminaryGTX 327 Installation Manual Page i190-00187-02 Rev 1TABLE OF CONTENTS1. GENERAL DESCRIPTION................................................................................................................. 11.1 INTRODUCTION................................................................................................................................ 11.2 EQUIPMENT DESCRIPTION ............................................................................................................ 11.3 INTERFACE SUMMARY................................................................................................................... 11.4 GTX 327 TRANSPONDER SPECIFICATIONS ................................................................................ 21.5 EQUIPMENT AVAILABLE ............................................................................................................... 21.6 INSTALLATION ACCESSORIES...................................................................................................... 31.7 ADDITIONAL EQUIPMENT REQUIRED ........................................................................................ 31.8 INSTALLATION APPROVAL ........................................................................................................... 31.9 LIMITED WARRANTY...................................................................................................................... 42. INSTALLATION ................................................................................................................................. 52.1 INTRODUCTION................................................................................................................................ 52.2 UNPACKING AND INSPECTING EQUIPMENT............................................................................. 52.3 ANTENNA INSTALLATION............................................................................................................. 52.3.1 Location Considerations ........................................................................................................... 52.3.2 Antenna Installation.................................................................................................................. 52.3.3 Antenna Cable Installation........................................................................................................ 62.3.4 Antenna Cable Connectors........................................................................................................ 62.4 GTX 327 INSTALLATION................................................................................................................. 82.5 COOLING AIR..................................................................................................................................... 82.6 ELECTRICAL CONNECTIONS......................................................................................................... 83 POST INSTALLATION CONFIGURATION & CHECKOUT PROCEDURE ............................... 103.1 AIRCRAFT STATION LICENSING REQUIREMENTS................................................................. 103.2 OPERATION...................................................................................................................................... 103.2.1 Function Selection Switch ...................................................................................................... 113.2.2 Code Selection ........................................................................................................................ 123.2.3 Configuration Pages................................................................................................................ 13APPENDIX A. CERTIFICATION DOCUMENTS................................................................................... 14A.1 CONTINUED AIRWORTHINESS.................................................................................................... 14A.2 ENVIRONMENTAL QUALIFICATION FORM.............................................................................. 15
PreliminaryGTX 327 Installation Manual Page ii190-00187-02 Rev 1APPENDIX B. ASSEMBLY AND INSTALLATION DRAWINGS........................................................ 17B-1 GTX 327 OUTLINE DRAWING ......................................................................................................18B-2 GTX 327 CONNECTOR/RACK KIT ASSEMBLY DRAWING ..................................................... 19B-3 GTX 327 INTERCONNECT WIRING DIAGRAM.......................................................................... 20B-4 DUAL TXP INTERCONNECT WIRING DIAGRAM,ENCODING ALTITUDE CONNECTIONS...................................................................................... 21APPENDIX C. STC PERMISSION........................................................................................................... 22
PreliminaryGTX 327 Installation Manual Page 1190-00187-02 Rev 11. GENERAL DESCRIPTION1.1 INTRODUCTIONThis manual provides the installation and operating instructions for the GARMIN GTX 327 Digital DisplayTransponder system. Information pertaining to the maintenance, alignment, and procurement of replacementparts is found in the GTX 327 Maintenance Manual, P/N 190-00187-05.1.2 EQUIPMENT DESCRIPTIONThe GARMIN GTX 327 is a panel-mounted transponder with the addition of timing functions. Thetransponder is a radio transmitter and receiver that operates on radar frequencies, receiving ground radarinterrogations at 1030 MHz and transmitting a coded response of pulses to ground-based radar on afrequency of 1090 MHz.As with other Mode A/Mode C transponders, the GTX 327 replies with any one of 4,096 codes, which differin the position and number of pulses transmitted. By replying to ground transmissions, the GTX 327 enablesATC to display aircraft identification, altitude and groundspeed on ATC radar screens. The GTX 327 isequipped with IDENT capability that activates the Special Position Identification (SPI) pulse for 18 seconds.The GTX 327 is configured with all key controls. The layout of the front panel keys and displays segregatesthe transponder’s primary functions from the secondary timing functions. The unit can be configured so theaircraft avionics master bus can turn the unit on.1.3 INTERFACE SUMMARYThe GTX 327 provides the following interface connections via the rear connector:• Ten (10) encoding altimeter inputs.• External IDENT input.• External STBY input.• External suppression pulse input.• Switched power output of up to 1.5 amps (for digital altitude encoder power).• Aircraft power input (11 to 33 volts).• Aircraft dimming buss input voltage.• Aircraft master switch turn-on option.• Serial altitude input.• Serial altitude output.
PreliminaryGTX 327 Installation Manual Page 2190-00187-02 Rev 11.4 GTX 327 TRANSPONDER SPECIFICATIONSSPECIFICATION CHARACTERISTICTSO, JTSO C74c Class 1ATSO ENV CAT Refer to appendix AApplicable Documents FAA TSO C74c; RTCA DO-160CTemperature Range -20°C to +55°C (Continuous Operation)GTX 327 Unit Weight 1.60 lbs.GTX 327 Rack Weight 0.64 lbs.Power Requirements 11.0 to 33.0 Vdc; Max Power Input: 12 WattsHumidity 95% @ +55°C for 16 Hours; 85% @ +38°C for 32 HoursAltitude 50,000 FeetTransmitter Frequency 1090 MHzTransmitter Power 125 Watts minimum, 150 Watts nominal at the unit antennaportReceiver Frequency 1030 MHzReceiver Sensitivity -72dBm Nominal for 90% repliesMode A Capability 4096 Identification CodesMode C Capability 100 Foot Increments from -1000 to 63,000 feetExternal Suppression Input Low ≤ 0.5V; High ≥ 8V1.5 EQUIPMENT AVAILABLEITEM GARMIN P/NGARMIN GTX 327 Transponder 010-00188-00GARMIN GTX 327 Transponder, includes GARMIN installation kit,P/N 010-10216-00 010-00188-01GARMIN GTX 327 Installation kit 010-10216-00GARMIN GTX 327 Antenna kit 010-10160-00
PreliminaryGTX 327 Installation Manual Page 3190-00187-02 Rev 11.6 INSTALLATION ACCESSORIESThe following installation accessories are available:•GARMIN GTX 327 Installation Kit, P/N 010-10216-00 containing Connector/Rack Kit,P/N 011-00338-00 (see figure B-2 for connector/rack kit assembly drawing).•GARMIN GTX 327 Antenna Kit, P/N 010-10160-00. Note: A transponder antenna approved to TSOC66( ) or C74( ) that has been installed to meet the requirements of this manual may be approved foruse with the GTX 327.1.7 ADDITIONAL EQUIPMENT REQUIRED•Antenna Sealant - Use antenna manufacturer’s instructions, install according to FAA AC 43.13-2A.•Cables - The installer will supply all system cables. Cable requirements and fabrication is detailed inSection 2 of this manual.•Hardware - #6 Flat Head Screw (6 ea.) and #6-32 Self-Locking Nut (6 ea.). Hardware required tomount installation rack is not provided.•Encoding Altitude Digitizer - Use encoding altimeter manufacturer’s instructions, install according toFAA AC 43.13-2A.1.8 INSTALLATION APPROVALThe conditions and tests required for TSO approval of the GTX 327 Transponder and antenna are minimumperformance standards. It is the responsibility of those desiring to install this transponder and antenna eitheron or within a specific type or class of aircraft to determine that the aircraft installation standards are withinthe TSO standards. The GTX 327 and antenna may be installed only if further evaluation by the applicantdocuments an acceptable installation and is approved by the administrator. For GTX 327 TSO compliance,see Appendix A. For antenna TSO compliance, refer to antenna manufacturer’s literature.
PreliminaryGTX 327 Installation Manual Page 4190-00187-02 Rev 11.9 LIMITED WARRANTYGARMIN Corporation warrants this product to be free from defects in materials and manufacture forone year from the date of purchase. GARMIN will, at its sole option, repair or replace anycomponents that fail in normal use. Such repairs or replacement will be made at no charge to thecustomer for parts or labor. The customer is, however, responsible for any transportation costs. Thiswarranty does not cover failures due to abuse, misuse, accident or unauthorized alteration or repairs.THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND INLIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED OR STATUTORY,INCLUDING ANY LIABILITY ARISING UNDER ANY WARRANTY OFMERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, STATUTORY OROTHERWISE. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, WHICH MAYVARY FROM STATE TO STATE.IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECTOR CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE, ORINABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT. SOMESTATES DO NOT ALLOW THE EXCLUSION OF INCIDENTAL OR CONSEQUENTIALDAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.To obtain warranty service, call the GARMIN Customer Service department (913-397-8200) for areturned merchandise tracking number. The unit should be securely packaged with the trackingnumber clearly marked on the outside of the package and sent freight prepaid and insured to aGARMIN warranty service station. A copy of the original sales receipt is required as the proof ofpurchase for warranty repairs. GARMIN retains the exclusive right to repair or replace the unit orsoftware or offer a full refund of the purchase price at its sole discretion. SUCH REMEDY SHALLBE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.
PreliminaryGTX 327 Installation Manual Page 5190-00187-02 Rev 12. INSTALLATION2.1 INTRODUCTIONThis section provides the necessary information for the installing the GTX 327 Transponder, and whererequired, optional accessories. Installation of the GTX 327 will differ according to equipment location andother factors. Cabling will be fabricated by the installing agency to fit these various requirements. Thissection contains interconnect diagrams, mounting dimensions, and information pertaining to installation.Any deviations from the installation instructions prescribed in this document shall be accomplished inaccordance with the requirements set forth in FAA AC 43.13-2A.2.2 UNPACKING AND INSPECTING EQUIPMENTCarefully unpack the equipment and make a visual inspection of the unit for evidence of damage incurredduring shipment. If the unit is damaged, notify the carrier and file a claim. To justify a claim, save theoriginal shipping container and all packing materials. Do not return the unit to GARMIN until the carrier hasauthorized the claim.Retain the original shipping containers for storage. If the original containers are not available, a separatecardboard container should be prepared that is large enough to accommodate sufficient packing material toprevent movement.2.3 ANTENNA INSTALLATION2.3.1 Location ConsiderationsA. The antenna (GARMIN P/N 010-10160-00) should be well removed from any majorprotrusions, such as engine(s), propeller(s), and antenna masts. It should also be as far aspractical from landing gear doors, access doors, or other openings that could effect itsradiation pattern.B. The antenna should be mounted on the underside of the aircraft and in a vertical positionwhen the aircraft is in level flight.C. Avoid mounting the antenna within three feet of the ADF sense antenna or any othercommunication antenna and six feet from the DME antenna.D. To prevent RF interference, the antenna must be physically mounted a minimum distance ofthree feet from the GTX 327.NOTEIf the antenna is being installed on a composite aircraft, ground planes must sometimes beadded. Conductive wire mesh, radials, or thin aluminum sheets embedded in the compositematerial provide the proper ground plane allowing the antenna pattern (gain) to be maximizedfor optimum transponder performance.2.3.2 Antenna InstallationA. Install the antenna according to the antenna manufacturer’s instructions and FAA AC 43.13-2A.
PreliminaryGTX 327 Installation Manual Page 6190-00187-02 Rev 12.3.3 Antenna Cable InstallationWhen 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 powerfor fluorescent lighting.•Avoid routing cable near ADF antenna cable (allow at least a 12-inch separation).The table below lists examples of the recommended antenna cable vendors and the type of cable to be usedfor specific lengths of cable. Any cable meeting specifications is acceptable for the installation.Cable Length (in feet) Use Times MicrowaveSystems Part Number5.5 to 10 M17/111-RG30310 to 17.5 SF-304 or M17/12717.5 to 27 SF-5394 or M17/79Times Microwave Systems,P.O. Box 5039Wallington, CT 06492-5039Tel: 203-949-8400Fax: 203-949-8423Cable Length (in feet) Use Electronic CableSpecialists Part Number5.5 to 10 ECS 3C142B10 to 17.5 ECS 31160117.5 to 27 ECS 31120127 to 41 ECS 310801Electronic Cable Specialists,5300 W. Franklin DriveFranklin, WI 53132Tel: 800-327-9473414-421-5300Fax: 414-421-53012.3.4 Antenna Cable ConnectorsThe antenna cable requires a BNC connector at the antenna and a male BNC “Blindmate” connector(P/N 330-00198-00, supplied with GTX 327 installation kit 010-10216-00) at the transponder. Instructionsfor installing the Blindmate BNC are shown in steps A-G. Follow BNC connector manufacturer instructionsfor assembly of the BNC connector.
PreliminaryGTX 327 Installation Manual Page 7190-00187-02 Rev 1A. Trim coax outer insulation back 0.50”.B. Trim braid (not center conductor or insulation) back 0.25”.C. Strip Insulation back 0.120”.NOTEPlace the ferrule over the coax braid, flush against the coax outer insulation before performingthe next step if the outside diameter of the coax braid is smaller than the inside diameter of thecenter connector sidewall opening.D. Insert cable (center conductor, dielectric and shield braid) through the sidewall of the connectorand solder the center conductor to the center pin of the connector.NOTEWhen using low loss cable it may be necessary to flatten the solid wire center conductor slightlyso it can fit the slot on the RF connector center pin. When soldering, avoid applying excess heatto the connector body, and center conductor insulator.E. Heat the outside of the connector sleeve and at the same time apply solder between the braidand the sleeve. Continue to apply heat until the solder flows evenly.F. Install 50 V Matching Bushing.G. Insert connector cap and tack solder in two places.
PreliminaryGTX 327 Installation Manual Page 8190-00187-02 Rev 12.4 GTX 327 INSTALLATIONNOTESAvoid installing the unit near heat sources. If this is not possible, ensure that additional coolingis provided. Allow adequate space for installation of cables and connectors. The installer willsupply and fabricate all of the cables. All wiring must be in accordance with FAAAC 43.13-2A.A. Assemble the connector/rack kit according to figure B-2. Install the rack assembly accordingto the dimensions given in figure B-1. Mounting brackets are not supplied due to the widerange of mounting configurations available. Suitable mounting brackets may be fabricatedfrom sheet metal or angle stock. To insure a sturdy mount, rear support for the unit shouldbe provided.B. Looking at the bottom of the transponder, make sure the front lobe of the hold down deviceis in a vertical position. This can be accomplished by using a 3/32” Allen wrench throughthe face plate.C. Slide the unit into the rack until the front lobe of the unit touches the rack. Guide pins on theback plate will help in the proper alignment of the unit in the rack.D. Turn the Allen wrench clockwise until unit is secured in the rack. Continue turning untiltight. Do not overtighten the screw.E. To remove the unit from the rack, turn the 3/32” Allen wrench counterclockwise until itdisengages from the rack.2.5 COOLING AIRThe GTX 327 meets all TSO requirements without forced air-cooling. However Garmin recommends forcedair-cooling for all products to increase the long-term reliability. The GTX 327 was designed to handle aconstant 450 PRF, with short periods of 1200 PRF. Rate limit is set at 1200PRF. A typical radar site wouldinterrogate the transponder once every 5 to 10 seconds for approximately 100 msec at a 400 PRF rate. Invery high traffic areas with multiple ground stations and TCAS traffic it is possible to have long term PRFrates above 450 PRF. The GTX 327 measures the unit temperature and without force air-cooling the replyrate will be reduced to protect the transmitter from overheating.2.6 ELECTRICAL CONNECTIONSAll electrical connections, except for the antenna, are made through a single, 25 pin D connector. Figure 2-1defines the electrical characteristics of all input and output signals and identifies the cable requirements foreach signal. Required connector and associated hardware are supplied in the installation kit(P/N 010-10216-00). See figures B-3 and B-4 for interconnect wiring diagrams.
PreliminaryGTX 327 Installation Manual Page 9190-00187-02 Rev 1PIN DESCRIPTION I/O1 AVIONICS MASTER ON In2 DO NOT CONNECT --3 ALTITUDE A1 In4 ALTITUDE C2 In5 ALTITUDE A2 In6 ALTITUDE A4 In7 ALTITUDE C4 In8 EXTERNAL IDENT INPUT In9 ALTITUDE B1 In10 ALTITUDE C1 In11 ALTITUDE B2 In12 ALTITUDE B4 In13 POWER GROUND In14 SWITCHED POWER OUTPUT Out15 POWER INPUT (+11 TO +33 VDC) In16 EXTERNAL STANDBY In17 EXTERNAL SUPPRESSION In18 ALTITUDE D4 In19 RS232 In20 RS232 Out21 RESERVED --22 SQUAT SWITCH In23 28 VDC PANEL LIGHTING INPUT In24 14 VDC/5 VDC PANEL LIGHTING INPUT In25 POWER GROUND InFigure 2-1. DB-25 Pin-Out Definitions
PreliminaryGTX 327 Installation Manual Page 10190-00187-02 Rev 13. POST INSTALLATION CONFIGURATION & CHECKOUT PROCEDURE3.1 AIRCRAFT STATION LICENSING REQUIREMENTSThe Telecommunications Act of 1996, effective February 8, 1996, provides the FCC discretion to eliminateradio station license requirements for aircraft and ships. The GTX 327 installation must comply with currenttransmitter licensing requirements. To find out the specific details on whether a particular installation isexempt from licensing, please see FCC Fact Sheet PR 5000 or contact the FCC at (800)-322-1117.If an aircraft license is required, make application for a license on FCC form 404, Application for AircraftRadio Station License. The FCC also has a fax-on-demand service to provide forms by fax at(202)-418-0177.The GTX 327 owner accepts all responsibility for obtaining the proper licensing before using thetransponder.3.2 OPERATIONNOTEThe coverage you can expect from the GTX 327 is limited to line of sight. Low altitude oraircraft antenna shielding by the aircraft itself may result in reduced range. Range can beimproved by climbing to a higher altitude. It may be possible to minimize antenna shielding bylocating the antenna where dead spots are only noticed during abnormal flight attitudes.Figure 3-1. GTX 327 Front PanelNOTEThe GTX 327 should be turned off before starting aircraft engine(s).
PreliminaryGTX 327 Installation Manual Page 11190-00187-02 Rev 13.2.1 Function Selection SwitchesThe function selection switches are:• OFF  Turns the GTX 327 off.• STBY Turns the transponder ON in STBY mode or selects STBY mode. When in STBY thetransponder will not reply to any interrogations from the ground radar system. At poweron the last active identification code will be selected.• ON  Turns the transponder ON in Mode A, the identification mode or selects Mode A. Atpower on the last active identification code will be selected. In addition to the aircraft’sidentification code, the transponder will also reply to altitude interrogations (mode C) withsignals that do not contain altitude information. The Reply Symbol " ))) " will bedisplayed when the transponder replies to ground interrogation.• ALT  Turns the transponder on in Mode A and Mode C, or, if already on, selects Mode A andMode C. This is the identification and altitude-reporting modes to respond to ATC aircraftidentification interrogations and altitude interrogations with standard pressure altitude(29.92 inches Hg.) received from an external altitude digital encoder. The ALT positionmay be used in aircraft that are not equipped with the optional altitude encoder, however,the only response will be discreet signals that do not contain altitude information. TheReply Symbol " ))) " will be displayed when the transponder replies to groundinterrogation.NOTEAny time the ON or ALT function is selected the transponder becomes an active part of the beaconsystem. Select ON or ALT as late as practical prior to takeoff and to OFF or STBY as soon aspractical after landing unless previously changed to STBY at the request of ATC. An optional SquatSwitch can automate transponder control during take off and landing. If installed and configured theSquat Switch will automatically transition the transponder to the ALT mode at take off. Uponlanding the Squat Switch will automatically transition the transponder to STBY mode after a presettime delay. This time delay can be selected via a configuration page.• IDENT  On occasion, the controller will request to SQUAWK IDENT. Respond bymomentarily pressing and releasing the IDENT button. Pressing the IDENT buttonactivates the Special Position Identification (SPI) Pulse for 18 seconds identifying yourtransponder return from other aircraft on the controller’s scope. The word IDENT will bedisplayed in the upper left corner of the display while the IDENT feature is active.• VFR  Programs transponder code to the default VFR code. Default code is programmed on aconfiguration page. Pressing the VFR button again will restore the last identification code.
PreliminaryGTX 327 Installation Manual Page 12190-00187-02 Rev 1• FUNC  Changes modes displayed on the right side of the display. Displayed data includesFlight Level, Flight Time, Count Up timer, Count Down timer, screen Contrast, andDisplay brightness (if configured for manual contrast and brightness.)Flight Level: Displays the altitude data supplied to the GTX 327 in feet, flight level format ormeters depending on configuration setup.Flight Time: Displays the flight time controlled by the Start/Stop button if no Squat Switch isconfigured or timer starts when the altitude begins to increase. Under Squat Switchcontrol the timer begins when lift off is sensed.Count Up Timer: Controlled by START/STOP and CLR button.Count Down Timer: Controlled by START/STOP, CLR, and CRSR buttons. Count down timerentered with 0 – 9 buttons.Contrast: Controlled by 8 and 9 buttons.Display Brightness: Controlled by 8 and 9 buttons• START/ STOP  Starts and stops the Count Up and Count Down timers.• CRSR  Activates the change fields for the Count Down timer when selected by the FUNC key.• CLR  Resets the Count Up and Count Down timers.• 8  Reduces screen Contrast and display Brightness. Enters the number eight into the CountDown timer.• 9  Increases screen Contrast and display Brightness. Enters the number nine into the CountDown timer.3.2.2 Code SelectionThe code selector consists of eight push button (0 – 7) switches that provide 4,096 active identificationcodes. Pushing one of these buttons begins the code selection sequence. The new code will not be activatedand stored in EEPROM until the forth button is pressed. Pressing the CLR button will cancel the previousbutton press and restore the code prior to the last button press. Pressing the CRSR button when data entryhas begun will remove the cursor and cancel data entry. If an identification code entry is not completed orthere is no other key press for four seconds the last active code will be restored.NOTEAttention should be paid to the selected identification code. The selected code should be the oneassigned by air traffic control for IFR flight or rules applicable to transponder use for VFR flight.Care should be taken not to select code 7500 and all codes in the 7600 and 7700 series (i.e., 7600-7677,7700-7777) which trigger special indicators in automated facilities. Only nondiscrete code 7500 will bedecoded as the hijack code. An aircraft’s transponder code (when available) is utilized to enhance thetracking capabilities of the ATC facility, therefore care should be taken when making routine code changes.
PreliminaryGTX 327 Installation Manual Page 13190-00187-02 Rev 13.2.3 Configuration PagesHolding down the CRSR button and pressing the ON button provides access to the configuration pages. TheFUNC button will sequence through the configuration pages. The CRSR button will highlight selectablefields on each page. When a field is highlighted, numeric data entry will be performed with the 0-9 buttons,and list selections will be performed with the 8 or 9 buttons. Changes made through the configuration pagesare stored in EEPROM memory.• Display Backlight PageCurrent display backlight intensity: displayed valueSelect manual or automatic backlight sourceAutomatic backlight source: Select automatic backlight source (Photocell, 28Vdc, 5Vdc)Display backlight filter response time: Select display backlight response time (3-7) (default to 4)Display backlight filter slope: Select display backlight filter slope value (0-99) (default to 50)Display backlight filter minimum value: Select display minimum filter slope value (0-99) (default to 50)Display backlight filter offset: Select display backlight filter offset value (0-99) (default to 50)• Key Backlight PageCurrent key backlight intensity: Displayed valueAutomatic key backlight source: Select automatic key backlight source (Photocell, 28Vdc, 5Vdc)Key backlight filter response time: Select key backlight response time (3-7) (default to 4)Key backlight filter slope: Select key backlight filter slope value (0-99) (default to 50)Key backlight filter minimum value: Select key minimum filter slope value (0-99) (default to 50)Key backlight filter offset: Select key backlight filter offset value (0-99) (default to 50)• Contrast Configuration PageSelect contrast mode (Auto, Manual) (default, to Auto)Select contrast offset (0 to99) (default, to 50)• Operation Configuration Page #1VFR identification code: Enter the VFR identification code (default 1200)Altitude Input source: Select the altitude input source [Gray code(default), Icarus, Shadin]Altitude display format: Select altitude display format [Flight level (default), Feet, Meters]Aircraft climb rate: Enter aircraft climb rate [100 to 2000 fpm (500 fpm default)]• Operation Configuration Page #2SQUAT SWITCH senseAutomatic STBY operation enabledAutomatic STBY delay duration• Gray Code Input Configuration PageGray Code discretesGray Code altitude• Discrete Input Configuration PageEXTERNAL IDENT input:EXTERNAL STANDBY input:SQUAT SWITCH input: On ground equals High or Low
PreliminaryGTX 327 Installation Manual Page 14190-00187-02 Rev 1APPENDIX A CERTIFICATION DOCUMENTSA.1 CONTINUED AIRWORTHINESSOther than for regulatory periodic functional checks, maintenance of the GTX 327 is “on condition” only.Refer to the GTX 327 Maintenance Manual, (Garmin P/N 190-00187-05). Periodic maintenance of theGTX 327 is not required.
PreliminaryGTX 327 Installation Manual Page 15190-00187-02 Rev 1A.2 ENVIRONMENTAL QUALIFICATION FORMNOMENCLATURE: GTX 327 Airborne ATC Transponder EquipmentTYPE/MODEL/PART NO.: 010-00188-( )TSO/JTSO COMPLIANCE: TSO - C74c Class 1AJTSOMANUFACTURER’S SPECIFICATION AND/OR OTHERAPPLICABLE SPECIFICATION: 004-00070-00 minimum Performance SpecificationMANUFACTURER: GARMIN INTERNATIONALADDRESS: 1200 E 151st St, Olathe, Kansas 66062Conditions Section Description of Conducted TestsTemperature and Altitude 4.0 Equipment tested to Categories A1 & D1 except as notedLow Temperature 4.5.1 -208 CHigh Temperature 4.5.2. & 4.5.3 +558 CIn-Flight Loss of Cooling 4.5.4 Cooling air not requiredAltitude 4.6.1 50,000 FeetDecompression 4.6.2 8,000 to 50,000 FeetOverpressure 4.6.3 -15,000 FeetTemperature Variation 5.0 Equipment tested to Category CHumidity 6.0 Equipment tested to Category AShock 7.0 Equipment tested according to DO-160C, Par. 7.2.1Operational 7.2 6 g’sCrash Safety 7.3 15 g’sVibration 8.0 Equipment tested without shock mounts to Categories B,M and N (Table 8-1)Explosion 9.0 Equipment identified as Category X, no test requiredWaterproofness 10.0 Equipment identified as Category X, no test requiredFluids Susceptibility 11.0 Equipment identified as Category X, no test required
PreliminaryGTX 327 Installation Manual Page 16190-00187-02 Rev 1Conditions Section Description of Conducted TestsSand and Dust 12.0 Equipment identified as Category X, no test requiredFungus 13.0 Equipment identified as Category X, no test requiredSalt Spray 14.0 Equipment identified as Category X, no test requiredMagnetic Effect 15.0 Equipment tested to Class ZPower Input 16.0 Equipment tested to Category BVoltage Spike 17.0 Equipment tested to Category AAudio FrequencySusceptibility 18.0 Equipment tested to Category BInduced Signal Susceptibility 19.0 Equipment tested to Category ARadio FrequencySusceptibility 20.0 Equipment tested to Category TRadio Frequency Emission 21.0 Equipment tested to Category ZLightning Induce TransientSusceptibility 22.0 Equipment identified as Category XXXX, no testrequiredLightning Direct Effects 23.0 Equipment identified as Category X, no test requiredIcing 24.0 Equipment identified as Category X, no test required
PreliminaryGTX 327 Installation Manual Page 17190-00187-02 Rev 1APPENDIX BASSEMBLY AND INSTALLATION DRAWINGS
PreliminaryGTX 327 Installation Manual Page 18190-00187-02 Rev 1Figure B1 GTX 327 OUTLINE DRAWING
PreliminaryGTX 327 Installation Manual Page 19190-00187-02 Rev 1Item Part Number Description Qty1 211-62204-16 SCREW, 4-40 X .75, FLHP, SS/P 22 212-2S001-00 WSHR, FLAT, NON-STD, SS 13 232-00013-01 SNAP RING, EXT, 7/16 14 330-00113-25 BACKSHELL, MTLZ PLSTC, 25 CONT. 15 330-00184-25 CONN., D-SUB, MIL CRP, SCKT, 25 16 330-00198-00 CONN. BNC, MALE BLINDMATE 1NOT SHOWN 336-00022-00 CONT. SCKT, MIL CRP, SIZE 20 25NOT SHOWN 336-00023-00 CONT. SCKT, MIL CRP, SIZE 20-18 5NOT SHOWN 312-00005-05 TUBING, HT SHRINK 2.3IN7 115-00285-00 INSTALL RACK 1NOT SHOWN 161-00215-00 LABEL, S/N, INSTL RACK 18 125-00032-02 BACK PLATE 19 211-60234-06 SCREW, 4-40X.187, PHP, SS/P 410 210-10000-04 NUT, HEX NY LCKNG, 4-40 211 234-10002-00 SPRING WASHER 1011-00338-00 CONNECTOR/RACK KITNOTES:1. THIS PART IS SUPPLIED WITH ITEM 4.NOTE 1Figure B2 GTX 327 CONNECTOR/RACK KIT ASSEMBLY DRAWING
PreliminaryGTX 327 Installation Manual Page 20190-00187-02 Rev 1Figure B3 GTX 327 INTERCONNECT WIRING DIAGRAM
PreliminaryGTX 327 Installation Manual Page 21190-00187-02 Rev 1Figure B4 DUAL TXP INTERCONNECT WIRING DIAGRAM, ENCODING ALTITUDE CONNECTIONS
PreliminaryGTX 327 Installation Manual Page 22190-00187-02 Rev 1APPENDIX CSTC PERMISSIONConsistent with N8110.69 or Order 8110.4, Aviation Authority approved installations are hereby grantedpermission to use ST2484WI-A data to modify aircraft.

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