Garmin GTX 327 Installation Manual
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Garmin GTX 327 Installation Manual

Garmin gtx 327 transponder installation manual
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GTX
327
TM
TRANSPONDER
INSTALLATION
MANUAL
Garmin International, Inc.
190-00187-02 Revision J
May 2003

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  • Page 1 TRANSPONDER INSTALLATION MANUAL Garmin International, Inc. 190-00187-02 Revision J May 2003...
  • Page 2 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...
  • Page 3 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. GTX 327 Installation Manual...
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  • Page 5: Table Of Contents

    1.3 MUTUAL SUPPRESSION PULSES ....................1 1.4 INTERFACE SUMMARY ........................1 1.5 GTX 327 TRANSPONDER SPECIFICATIONS .................2 1.5.1 Transponder Specifications......................2 1.5.2 Physical Characteristics of the GTX 327...................3 1.6 EQUIPMENT AVAILABLE ........................3 1.6.1 Configurations Available ......................3 1.6.2 Installation Accessories ......................3 1.7 ADDITIONAL EQUIPMENT REQUIRED ..................4 1.8 INSTALLATION APPROVAL......................4...

  • Page 6: Paragraph Page

    3.3.10 EXTERNAL SWITCH Page ....................32 3.3.11 ANALOG INPUT Page ......................32 APPENDIX A. CERTIFICATION DOCUMENTS..................33 A.1 CONTINUED AIRWORTHINESS ....................33 A.2 ENVIRONMENTAL QUALIFICATION FORM ................36 APPENDIX B. ASSEMBLY AND INSTALLATION DRAWINGS ............39 APPENDIX C. STC PERMISSION......................51 Page iv GTX 327 Installation Manual Rev J 190-00187-02...
  • Page 7 LIST OF ILLUSTRATIONS FIGURE PAGE 2-1 RF Connector Assembly ........................10 2-2 Dual GTX 327, Single Encoder, Serial Input Connections..............15 3-1 GTX 327 Front Panel ..........................19 B1 GTX 327 Outline Drawing........................41 B2 GTX 327 Connector/Rack Kit Assembly Drawing................43 B3 GTX 327 Recommended Panel Cutout Dimensions ................45 B4 GTX 327 Interconnect Wiring Diagram....................47...
  • Page 8 NUMBER DATE NOTE At the time of this revision, the current software version for the GTX 327 is 2.06. The software version and information in this document are subject to change without notice. Visit supplemental the Garmin web site (www.garmin.com) for current manual updates and information concerning the operation of this and other Garmin products.

  • Page 9: General Description

    1090 MHz. As with other Mode A/Mode C transponders, the GTX 327 replies with any one of 4,096 codes, which differ in the position and number of pulses transmitted. By replying to ground transmissions or TCAS interrogations, the GTX 327 enables ATC to display aircraft identification, altitude and groundspeed on ATC radar screens or TCAS traffic indicators.

  • Page 10: Gtx 327 Transponder Specifications

    Aircraft dimming bus input voltage. • Aircraft master switch turn-on option. • Serial altitude, airdata or GPS input. • Serial altitude output. GTX 327 TRANSPONDER SPECIFICATIONS 1.5.1 Transponder Specifications SPECIFICATION CHARACTERISTIC TSO C74c Class 1A, JTSO-C74c Class 1A TSO, JTSO TSO ENV CAT...

  • Page 11: Physical Characteristics Of The Gtx 327

    010-10160-00 * Note: 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 327. GTX 327 Installation Manual Page 3...

  • Page 12: Additional Equipment Required

    013-00066-00) can provide altitude data in either serial or parallel gray code format. INSTALLATION APPROVAL The conditions and tests required for TSO approval of the GTX 327 Transponder and antenna are minimum performance standards. It is the responsibility of those desiring to install this transponder and antenna either on or within a specific type or class of aircraft to determine that the aircraft installation standards are within the TSO standards.

  • Page 13: Limited Warranty

    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.
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  • Page 15: Installation

    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.

  • Page 16: Installation Approval Considerations For Pressurized Aircraft

    4. Obtain FAA Advisory Circular AC-183C and select (and contact) a DER from the roster of individuals identified thereunder. 5. Contact an aviation industry organization such as the Aircraft Electronics Association and request their assistance. Page 8 GTX 327 Installation Manual Rev J 190-00187-02...

  • Page 17: Antenna Cable Installation

    1.5 dB attenuation at 1 GHz including the connector. Connector item 6 (Garmin 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.

  • Page 18: Rf Connector Assembly

    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 10 GTX 327 Installation Manual Rev J 190-00187-02...

  • Page 19: Gtx 327 Installation

    GTX 327 provides beneficial cooling to the unit. The GTX 327 is designed to dissipate its internal heat to the rear heat sink without the need of blowing air inside the unit.

  • Page 20: Electrical Connections

    Table 2-4 defines the electrical characteristics of all input and output signals and identifies the cable requirements for each signal. Required connector and associated hardware are supplied with the Mounting Rack, Backplate and Connector kit (Garmin P/N 010-10161-01). See figures B4 and B5 on pages 43 and 45 for interconnect wiring diagrams.

  • Page 21: P3271 Pin Assignments

    POWER INPUT (+11 TO +33 VDC) EXTERNAL STANDBY EXTERNAL SUPPRESSION ALTITUDE D4 RS-232 IN 1 RS-232 OUT 1 RESERVED AIRBORNE SENSE (SQUAT SWITCH) 28 VDC PANEL LIGHTING INPUT 14 VDC/5 VDC PANEL LIGHTING INPUT POWER GROUND GTX 327 Installation Manual Page 13 190-00187-02 Rev J...

  • Page 22: Power And Lighting Function

    Lighting Bus The GTX 327 unit can be configured to track a 28 Vdc, 14 Vdc, 5 Vdc or 5 Vac lighting bus using these inputs. The GTX 327 can also automatically adjust for ambient lighting conditions based on the photocell.

  • Page 23: Dual Gtx 327, Single Encoder, Serial Input Connections

    Altimeter Interconnect, Dual GTX 327 Installation Refer to figure B5 on page 45 for Dual GTX 327 altimeter interconnections. A dual GTX 327 installation can accept either parallel wire gray code altimeter input as shown in figure B5 or RS-232 serial data input as shown below.

  • Page 24: Discrete Inputs Pin Assignments

    Altimeter Selection Priority The installer must be aware of the GTX 327 priority for selecting encoded altimeter interconnections. The GTX 327 searches in this sequence for altitude, and stops when it finds a valid pressure altitude input. Only approved devices may provide altitude to the GTX 327 in accordance with 14 CFR Part 91.217. In addition, all altitude reporting devices installed in the aircraft must meet certification requirements of 14 CFR Part 91.413.

  • Page 25: Rs-232 Serial Data Electrical Characteristics

    The GTX 327 can be configured to include GPS, Altitude and Airdata data inputs on two RS-232 input lines. Altitude data supplied to the GTX 327 can be output to the 400/500 Series Garmin products on an RS-232 output line.
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  • Page 27: Post Installation Configuration & Checkout Procedure

    OPERATION NOTE The coverage you can expect from the GTX 327 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.

  • Page 28: Function Selection Switches

    The function selection switches are: • OFF  Powers off the GTX 327. Pressing the STBY, ON or ALT key powers on the transponder displaying the last active identification code. • STBY  Selects the standby mode. When in standby mode the transponder will not reply to any interrogations.
  • Page 29 Pressure Altitude, Flight Time, Count Up and Count Down timers. In the Configuration Mode, steps through the function pages. Pressure Alt: Displays the altitude data supplied to the GTX 327 in feet, flight level format or meters, depending on configuration setup.

  • Page 30: Function Display

    3.2.2 Function Display PRESSURE ALT Displays the altitude data supplied to the GTX 327 in feet, hundreds of feet (i.e., flight level), or meters, depending on configuration. FLIGHT TIME Displays the Flight Time, controlled by the START/STOP key or by one...

  • Page 31: Code Selection

    Pressing the FUNC key displays the next configuration page without saving the changes. Configuration page changes are stored in EEPROM memory. To exit the configuration pages, turn the power off. Then turn on again (without holding the FUNC key) for normal operation. GTX 327 Installation Manual Page 23 190-00187-02...

  • Page 32: Display Mode Page

    Selection Description Display backlighting is controlled manually by the pilot on the MAN (Manual) GTX 327 DISPLAY page. No backlight parameters can be entered when the manual mode is selected. DEFAULT. Display backlighting is automatically controlled, based AUTO (Automatic) on the parameters entered on this configuration page. When AUTO is selected, the DISPLAY page does not appear to the pilot when the GTX 327 is operated in normal mode.

  • Page 33: Key Lighting Page

    KEY (Key Lighting) Selection Description MAN (Manual) Key lighting is controlled manually by the pilot on the GTX 327 DISPLAY page. AUTO (Automatic) Key lighting is automatically controlled based on the parameters entered on this configuration page.
  • Page 34 DEFAULT. Key lighting level is determined by the ambient light PHOTO (Photocell) level as measured by the photocell on the GTX 327. Backlight level tracks a 14 volt DC aircraft lighting bus. Backlight level tracks a 28 volt DC aircraft lighting bus.

  • Page 35: Contrast Configuration Page

    Description MAN (Manual) The display contrast is manually adjusted either here or by the pilot using the GTX 327 CONTRAST page. AUTO (Automatic) DEFAULT. The display contrast is automatically compensated for temperature and other factors. An offset can be entered in the contrast level adjustment described below.

  • Page 36: Rs-232 Input/Output Page

    3.3.5 RS-232 INPUT/OUTPUT Page This is the electrical source for the GTX 327 altitude and RS-232 INPUT/OUTPUT Page GPS data input. Refer to paragraph 2.6.2.4 for altimeter data selection priority. RS-232 INPUT (Altitude Source, GPS Data) SELECTION DESCRIPTION DEFAULT. The altitude code input is not from an RS-232 source.

  • Page 37: Operation Configuration

    VFR ID (VFR Transponder Code) This field is the four-digit code that will be selected when the user presses the GTX 327 VFR key. In the United States, 1200 is the VFR code for any altitude. Many European countries use 7000 as the VFR code.
  • Page 38 Second Configuration Page The GTX 327 Flight Time may be based on the squat switch state. The squat switch field may be set to either YES or NO. (Default NO). If YES, sense may be set to HIGH or LOW. If set to NO, airborne status for auto standby and flight timer features will be determined by input data.

  • Page 39: Aircraft Type Page

    This page is not used in systems that contain serial altitude input. DECODED ALTITUDE This field displays the gray code altitude input in feet. Verify that it is the correct altitude. GTX 327 Installation Manual Page 31 190-00187-02 Rev J...

  • Page 40: External Switch Page

    Displays the LCD temperature 28V LTG Displays the current 28 Volt lighting bus ADC level. REPLY Displays the current reply active ADC level. UNIT TEMP Displays the current unit temperature ADC level. Page 32 GTX 327 Installation Manual Rev J 190-00187-02...

  • Page 41: Appendix A. Certification Documents

    ICA. Following is a suggested ICA for a Garmin GTX 327 unit installation. Some of the checklist items do not apply, in which case they should be marked “N/A” (Not Applicable).
  • Page 42 Refer to the GTX 327 Pilot’s Guide, Garmin P/N 190-00187-00. Servicing Information Maintenance Instructions Maintenance of the GTX 327 is ‘on condition’ only. Periodic maintenance is not required. Refer to the GTX 327 Maintenance Manual. Troubleshooting Information Refer to the GTX 327 Maintenance Manual.
  • Page 43 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 aircraft’s inspection/maintenance requirements. GTX 327 Installation Manual Page 35 190-00187-02...

  • Page 44: Environmental Qualification Form

    ENVIRONMENTAL QUALIFICATION FORM NOMENCLATURE: GTX 327 Airborne ATC Transponder Equipment TYPE/MODEL/PART NO.: 010-00188-( ), which includes 011-00490-( ) TSO/JTSO COMPLIANCE: TSO - C74c Class 1A, JTSO - C74c Class 1A MANUFACTURER'S SPECIFICATION AND/OR OTHER APPLICABLE SPECIFICATION: 004-00070-00 Minimum Performance Specification...
  • Page 45 160 Hz and 181 Hz. At the end of the vibration test cycle the two frequencies had combined into one frequency at 179 Hz. There was no change in unit performance. GTX 327 Installation Manual Page 37 190-00187-02...
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  • Page 47: Appendix B. Assembly And Installation Drawings

    ASSEMBLY AND INSTALLATION DRAWINGS GENERAL This section contains the following installation drawings: • B1, GTX 327 Outline Drawing • B2, GTX 327 Connector/Rack Kit Assembly Drawing • B3, GTX 327 Recommended Panel Cutout Dimensions • B4, GTX 327 Interconnect Wiring Diagram •...
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  • Page 54: Appendix C. Stc Permission

    APPENDIX C STC PERMISSION Consistent with N8110.69 or Order 8110.4, Aviation Authority approved installers are hereby granted permission to use STC #SA00870WI data to modify aircraft. GTX 327 Installation Manual Page 51 190-00187-02 Rev J...
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