RogerT
Cleared for Takeoff
We put a garmin g3x panel in the Velocity VTwin we’ve been building. 2 460’s, 750, G5, 45R, remote com, remote audio panel. I can’t get the 460 pfd to establish the rs232 connection to and control the transponder. I verified the wiring to the right pins. It’s all wired per a Steinair diagram. When the guy certified the transponder he just checked the default 1200 code apparently. When we fly it we can follow it on Flightaware with the correct track and airspeed. Altitude is a little flaky though it reads right in the cockpit. So adsb is at least partially working. I emailed Garmin and got no reply. What am I missing here?