[Discuss-gnuradio] USRP2 transmitter spectrum measurements

[Ulrika Uppman]

Hi everyone!

When transmitting with the USRP2 and the RFX400 daughterboard, we get a very 
significant frequency spike at the tuned center frequency. The level of the 
spike is almost as high as the signal level, and it will appear even when 
transmitting a 0-amplitude sine wave signal. Does anyone know if this is some 
LO leakage or what this effects are caused by?

Regards
//Ulrika and Patrik