[USRP-users] help: USRP1 + WBX 50-2200

Thesis 2015 thesis15sie at gmail.com
Tue Dec 9 21:53:25 EST 2014

Good day,

We are beginners using the USRP1 with WBX v.3 50-2200 daughterboard and GNU
radio Companion version with UHD_003.008.000-18-g864f84b5 installed
on Ubuntu 14.04 LTS operating system. Our goal in using these is to create
an SDR WBFM receiver.

We have followed what was done in the video posted by the ettus research (
but have encountered some problems. As we ran the GRC file, both the fft
plot and scope plot appeared but all we could hear are static sounds
together with the script shown below:

Executing: "/media/thesis/Data/Downloads/Thesis/FM Reciever using

linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.008.000-18-g864f84b5

Using Volk machine: sse4_1_64_orc
-- Opening a USRP1 device...
-- Loading FPGA image: /usr/local/share/uhd/images/usrp1_fpga.rbf... done
-- Using FPGA clock rate of 64.000000MHz...
WARN: Sensor 'lo_locked' failed to lock within timeout on channel 0.

UHD Warning:
    Tune Request: 88.100000 MHz
      The requested RX frequency is outside of the system range, and has
been clipped:
        Target Frequency: 88.100000 MHz
        Clipped Target Frequency: 0.000000 MHz
      Successfully tuned to 0.000000 MHz
INFO: Audio sink arch: alsa
>>> Done

We are hoping that you could help us with this problem. Thank you.

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