USRP Software Radio
Very Weak Signal Input with USRP-2920
Hi,
I have two USRP-2920 here. One of them has a very weak signal input. I can only see it own spurs and LO leakage at RX1 and RX2. Even using Rx Gain = 30 dB only gives me a little amplification around 5 - 15 dB. The other USRP is working fine as expected. First I switched the whole daughterboards and then only the WBX-FE Simple R5.0 between both USRPs. I was able to localize the error. It is the WBX-FE Simple R5.0 which causes this behaviour.
You can see the input of both USRPs in the attached picture. Both spectrums were taken with the same settings. Does anybody have a idea?
Oh, one other thing. I am able to receive a signal with the faulty WBX-FE from a direct connected (with 30 dB attenuator) USRP. But the signal is also very weak. I have to set the TX Gain around 20 dB to see a little peak.
In transmission mode the TX1/RX2 port works as expcted. The signal output is fine.
