Messages

1

Technical Support / Re: Transponder FL fault following PAW and ADSB install.

« on: April 05, 2021, 08:20:31 pm »

Hi Peter

usb port 1 = Transponder Funke - 4,800

rainbow 462,

What settings do you have the USB Port in your Rosetta set to?

Regards

Peter

2

Technical Support / Re: Transponder FL fault following PAW and ADSB install.

« on: April 05, 2021, 06:01:06 pm »

Thanks for the reply Ian.

Would it still need connecting to the static pressure system in an unpressurised cockpit like a C42.  The funke manual just refers to having a silicon tube attached to the rear static port.

Thanks

3

Technical Support / Transponder FL fault following PAW and ADSB install.

« on: April 05, 2021, 11:23:04 am »

Just wanting to see if anyone has any ideas on the following issue.....
- C42 with funke TRT800H transponder (recently updated by funke) 
- Fitted PAW rosetta with external aerials and RS232 cable to transponder for ADBS out.   
- PAW is seeing plenty of contacts, so all good.
- ADSB is broadcasting position correctly as checked via a basestation and getyourwings software.   

However, the transponder FL reading is now behaving very strangely.   Sometimes it is correct and on a recent flight it started correct (vs Altimeter at 1013) on the ground, still behaved at varying heights for next 10 mins and then started to read about 1,500' lower than altitude.    Looking back at a few recent  flight tracks on flight radar also show this trend of reporting 1,500' lower than actual altitude.  On landing the error then varies and can even change while taxying.   Very odd. 

Any ideas as to what might be the issue or what to try gratefully received.

Thanks