The GTX 33 Mode S Transponder will not provide valid outputs until the aircraft post
installation configuration procedures are completed.
3.7.1 Configuration
When installed as part of the Garmin Integrated Flight Deck, the GTX 33 transponder must have FAA
approved configuration data. Configuration data is loaded to the GTX 33 from an aircraft-specific
Software Loader Card. Transponder settings are predetermined for a specific aircraft and are typically
contained within the file named ‘GTX1’. However, the aircraft registration number must be entered
manually.
The PFD serves as the graphics user interface to the installer configuring the system. For basic
configuration information, refer to the G1000 Line Maintenance and Configuration Manual, Garmin part
number 190-00303-04. For actual aircraft installation/checkout, use only aircraft manufacturer approved
checkout procedures.
Verify proper operation of the transponder by testing in accordance with Appendix F to 14 CFR Part 43 –
ATC Transponder Tests and Inspections.
For transponder installations operating with a Garmin GNS 480 (CNX80), refer to GNS 480 (CNX80)
Installation Manual, 560-0982-01 for configuration procedures and operation checks.
For transponder installations operating with a Garmin GTN 6XX/7XX, refer to the GTN 625/635/650 TSO
Installation Manual (190-01004-02) or the GTN 725/750 TSO Installation Manual (190-01007-02) for
configuration procedures and operation checks.
3.7.2 Interference Check
Turn on and verify operation of all avionics equipment except GTX 33. Then power GTX 33 on and verify
there is no interference with any other equipment in the aircraft. The operation/performance checks should
be made with all other avionics turned on. Verify that there is no interference during any mode of
transponder operation.
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