[Discuss-gnuradio] Re: BasicRX boards and AM transmission

[Patrick Strasser]

Martin Braun schrieb am 2007-12-10 17:06:
> Hi,
>
> RXing with the USRP simply doesn't work, though, neither with usrp_rx_nogui.py 
> nor with anything I could come up with. I get lots more noise than expected 
> and usually I get a very loud buzz or whistle which is a lot louder than the 
> TXed signal. Has anyone else had this problem?

> I'm using the Basic* boards directly connected to an antenna (no bandpass 
> filtering). 

Hello Martin!

The BasicRX has no aliasing filter. You get a lot of mirrored 
frequencies from above 30MHz. It is possible to receive FM Radio...

Check your selected frequency for mirror-frequencies from the UKW-Range. 
 Maybe you can use FM demodulation to identify a interferring FM radio 
station. Just a guess.

Patrick
--
Engineers motto: cheap, good, fast: choose any two
Patrick Strasser <patrick dot strasser at tugraz dot at>
Student of Telematik, Techn. University Graz, Austria