Garmin GTX 330D Maintenance Manual page 91

7.2.1 Download Procedures
1. Access the Dealer Resource Center
2. Obtain the transponder software as specified in the Equipment List and download to a laptop
computer.
3. Access the target directory for the software on the laptop computer.
4. Extract the files by double clicking on the downloaded .exe file.
7.2.2 GTX 33/330 Software Loading
CAUTION
If the unit is removed from the aircraft and operated, connect J3302
(GTX 33/330/33D/330D) and J3303 (GTX 330D/33D) to a 50 Ω 5 watt load. The GTX
transmits Mode S acquisition squitter pulses once per second whether interrogations are
received or not. Failure to connect a dummy load or antenna during this procedure will
cause the transponder to fail and possibly damage the unit.
1. Remove power from the GTX.
2. Connect the test harness to the GTX and laptop. Refer to figure 7-7 for details.
3. Enable the TEST MODE switch on the test harness.
4. Power on the GTX.
5. Double click on the file UPLOADXX.BAT (XX is an incremental number assigned to a specific
software version). The program will begin communicating with the GTX.
6. The upload process could take up to six minutes to complete.
NOTE
GTX 330 units will show a dynamic display test screen.
7. Once the upload is completed, the unit will reset itself, and turn on.
8. Remove power from the GTX.
9. Remove the test harness between the laptop and the GTX.
10. Install GTX into aircraft and power up system.
11. Verify the software version is correctly displayed.
190-00734-11
Rev. 6
on Garmin's website.
GTX 33X and GTX 3X5 ADS-B Maintenance Manual
Page 7-7