You should just do a refund & get your money back. I had a Gemini PFD and I could never get it bright enough to be useful in my RV-4. Ended up getting a Garmin G5 that works great in bright cockpits and you can use it as an altitude encoder for the newer Garmin transponders. Heck maybe it works with other transponders too, don't know. It has an RS 232 output.
AEIO-360, Hartzell C/S
RV grin every flight
"Sure is nice to have smart friends"