Here are step by step instructions to work with the USRP

(Work in Progress)

• Get and install the GNU Radio software from  http://www.gnuradio.org
• Get the airprobe GIT repository:
  • git clone  git://svn.berlin.ccc.de/airprobe
• Build the frame decoder:
  • cd airprobe/gsmdecode
  • ./bootstrap
  • ./configure
  • make
  • cd ..
• Build the acquisition software:
  • cd gsm-tvoid
  • ./bootstrap
  • ./configure
  • make
• Try it out using a recording:
  • cd src/python
  • wget  https://svn.berlin.ccc.de/projects/airprobe/raw-attachment/wiki/DeModulation/capture_941.8M_112.cfile
  • ./go.sh capture_941.8M_112.cfile
• Try decoding a live channel (replace 34 by something suitable):
  • ./gsm_scan.py -SN -pd -c 34| ../../../gsmdecode/src/gsmdecode -i