I just got the USRP2+WBX recently. And I used the famous "usrp2_fft.py" as a starting point.
The problem I met is that the curve plotted by the usrp2_fft.py seemed to be abnormal. Sometimes, the amplitude of the curve was around -150 dB, and sometimes it went below -400 dB.
An antenna was attached to the "TX/RX" port of the WBX.
I tried "usrp2_probe" and got the following information.
>>> USRP2 Probe
MAC Addr: 00:50:c2:85
Name (ID): 1
Converter Rate: 100000000 Hz
Gain Range (min, max, step size): 0.0 0.0 0.0
Freq Range (min, max): -90000000000.0 Hz 90000000000.0 Hz
It looks like to me the RF daughterboard was not properly configured.
Did anyone meet such a problem?
Also, I have another two questions:
For full-duplex communications, does it mean both "TX/RX" and "RX2" need to be attached to antennae? How to configure the WBX?
On "usrp2_fft.py", if the center frequency was set beyond 206 MHz, it would prompt "Failed". Why this happened? There was no such prompt using the FFT Sink on GRC.