Version 16.10 AF-6600 AF-5000 Series Install Manual 111
Garmin GTX 327 / GTX 330 Transponder
The AF-5000 can act as the altitude encoder and send the current pressure altitude on EFIS Serial Port #2.
The GTX 327 / GTX 330 should be configured for ICARUS 25ft altitude format. The EFIS can also be
configured to receive traffic data from the GTX 330 for the moving map. The GTX 330 should be set for
Serial 1 ICARUS Input and REMOTE/TIS output.
EFIS Serial Port EFIS Main Cable GTX 327 GTX 330
Serial Port #2 TXD Pin 13 Pin 19 Pin 22
Serial Port #2 RXD Pin 25 none Pin 23
NOTE: The only time an altimeter and your transponder altitude will agree is when you have the baro set at 29.92. All transponders
require pressure altitude referenced to standard pressure (29.92 in. Hg). The computers at the air traffic control center automatically
adjust your altitude for the pressure offset. Why is this done? If it was not done this way the altitude that all the planes were reporting
would be based on whatever setting a pilot had set and you would have a possibility for human error.
Sandia STX 165R Transponder
The EFIS will send altitude and commands to the remote transponder through a single serial port.
EFIS Serial Port EFIS Main Cable STX 165R STX 165R Function
Serial Port #2 TXD Pin 13 2 RS-232 RXD
Serial Port #2 RXD Pin 25 7 RS-232 TXD
1 Power (11-33V)
5 Ground
Sandia STX 165R Connector Pins
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