I have a WBX, and I've noticed that no matter what I transmit, the WBX
always introduces a very narrow (but full-power) tone at the center of
my spectrum. When the transmitter is disabled, the tone is not present.
This can be seen below, where I'm transmitting a stream of complex(0,0),
yet it still transmits this tone in at the center (520MHz):
spectrum.jpg
Has anyone experienced this before with the WBX board? I've confirmed
it's only my WBX board by using the same USRP2 board and trying my
RFX2400 and XCVR2450 with the same transmit script and sample stream and
neither see this problem.
I am using the latest USRP2 firmware that includes the WBX support, and
the newest GR git. It's possible that the board is defective in some
way... but I thought I'd punt it to the list to see if anyone else has
seen the issue.
- George
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