On Thu, May 06, 2010 at 06:12:33PM -0500, Evan Chen wrote: > Hello everyone, > > 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.
Looks like maybe you are still using the default image on your SD card. To use WBX with USRP2, you need to put the txrx_wbx.bin on the SD card, which you can obtain by building the firmware from a recent git master or by downloading from here: http://gnuradio.org/releases/usrp2-bin/trunk/txrx_wbx.bin Directions for updating your SD card can be found here: http://gnuradio.org/redmine/wiki/gnuradio/USRP2UserFAQ#How-do-I-change-the-firmware-and-FPGA-code-on-the-SD-Card Jason _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
