was he RF testing for radiated and/or conducted emissions?
In Stu's installation he had PilotAware connected to a transponder (over USB/RS232) and connected to intercom ATR833 I think.
He was only experiencing noise on certain VHF frequencies and not at all times.
In my simple setup, I ran an SDR as a cheap spectrum analyzer.
I scanned the 108-137 Mhz range for 24 hours and picked up nothing, I did get some noise at 120mhz, but I had ran a 'control sample' without PilotAware powered up, which saw the same peak
you can see this earlier analysis here :-
http://forum.pilotaware.com/index.php/topic,873.msg10573.html#msg10573The gain of the SDR was also pretty high at 38dB
This type of analysis is not one of my 'skillsets', and I know you have access to a pretty good spectrum analyzer Jeremy, maybe you could repeat the test ?
I think the point is that this was seen as happening infrequently at some point during the flight.
I am more inclined to believe this is a conducted issue rather than radiated.
Thx
Lee