[Discuss-gnuradio] USRP receive issues

[Rob Rhinehart]

Hello,

I have a straightforward setup using gnuradio and a USRP B100 to transmit CW to an E100 (SBX and WBX daughterboards, respectively). I have verified the RF output of the B100 with a spectrum analyzer and the receive capability of the E100 with a signal generator, but when I connect the two directly with coax I see a strange pattern on the receiver FFT (see attachment), when I'm expecting a spike at the center frequency. The receive window only shows 1MHz of bandwidth but I've looked at the spectrum around the center frequency and the spike is nowhere to be found. My sample rates are 500k

Has anyone else seen this before? Suggestions would be very welcome.

Thank you!

Rob

usrp_tx_rx.png
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