I just had a Trig TN72 installed to provide position to the TT22 transponder.
I just had a Trig TN72 installed to provide position to the TT22 transponder.
Also Flying RV-8: N931RV, My Yank and Bank plane!
Most likely the wiring is simply power, ground and RS232 serial data from the position source to the transponder. We have used the Garmin GPS 20A for the same thing with either Garmin hardware or with a Trig transponder. It works well with either. As I recall with one of the early ones we had to also wire in an airspeed switch to tell the system when to go from ground to airborne mode but I believe that has been taken care of by software. Corporately we are using the GTX345 in about 95 percent of the airplanes now, or a GTX45R when we are interfacing to a Garmin GTN series.
Mike Sutton
Cubcrafters Avionics
I also have the Trig TT22 but used the GRT Safefly2020 GPS as my position source. Connecting to the transponder was easy and I could use the same GPS for my GRT HX EFIS.
The only issue I have at the moment is no automatic Air/Ground switching. That was the only red ink on my PAPR report.
I need to dig into the software to see if there is a way to use GPS ground speed to switch. The manual only seems to refer to using a squat switch or an STC for using a pitot-static based airspeed switch to ground the squat switch pin.