I am currently testing two USRP radios with 3 WBX transcievers.
When I test the receive path, I would use gnuradio companion and go from
USRP source to FFT plot.
However, I see that at every center frequency of the FFT window there is
signal even though I am not inputting anything.
The signal power is about 0 dBm.
Also, if I inject a signal, the power of the signal is shown to be much
higher than the true power I am sending through.
For example, when I send a -50 dBm signal it shows up to be +30 dBm and
tried using multiple signal generators.
So now I’m stuck.
How do I fix this?