On Wednesday, August 7, 2013 12:21:18 AM UTC-4, wrote:
I also have a ModeS transponder (Trig TT21).

My "Own Transponder" issue was resolved with the update to the core FirmWare 3.31.

I know that this FW update particularly resolved the ModeS "Own Transponder" issue. I am not sure if it also addressed the ModeC "Own Transponder" issue.

(ModeS has the ICAO code encoded in the datastream which helps with recognition)

I only see Core Firmware 3.00 on the website. Where is 3.31 available?