Thanks for your reply, but to go back to your original question. I haven't experienced your problem with STBY. My manual said that the -
'Squitter transmitted at random intervals uniformly distributed over the range from 0.8 to 1.2 seconds'
I tried my TXPDR in the hangar and my PAW ground station (with autogenerated hex code). The PAW didn't show anything on STBY or ACS which wasn't surprising.
I put the aircraft well out onto the airfield, where it would get the occasional interrogation and I could see it on PAW, so mine seems to need interrogations.
My new manual which came with the upgrade to v5.2 says -
'STBY „Standby“
Transponder only responds to directly addressed Mode S interrogations, squitter remains active.'
What does squitter remains active mean? Is this what you are seeing on STBY?
The new manual also says -
'Transmission of position data is indicated by “p“ (type of squitter) in the upper line in the test mode'
but this doesn't work, if I unplug the GPS it still shows 'P'.
My original problem was having ATC unable to see me even though my TXPDR display was normal and even after I had cycled the power.
To answer your question - my TXPDR was updated in October 2016 to Mod 10/11, software version 3.7 to 5.2, Firmware to 102 and they added a new Rec board. Cost about £300.
I emailed funke to say that according reports on this forum, ADSB-OUT was not work correctly with v5.2 and they said that it can be upgraded to v5.3. They didn't say "Why do you need 5.3 because 5.2 is ok". so they are essentially admitted that 5.2 was not completely correct. The upgrade will cost 99.50 euros plus my postage and bank charges, but Once bitten ...
Chris
