"Greg" wrote in message
...
thanks Jim, I tried a scan between 2.010 to 2.025 GHz and did pick up a hiss on
2023.4000MHz WFM but as yet have not identified what it was.

What antenna are you using?
Mostly you'll find just interference, from computers, satellite recievers etc etc...

when I picked up the signal I was using an AOR SA7000 antenna.