Hello everyone, I am part of Auburn University's Software Defined Radio Senior Design team,
Software being used: Ubuntu v.9.10 on xfs partition GNURadio v.3.3 (git) Xine Available hardware: USRP1, USRP2, WBX daughterboard, TVRX daughterboard We followed the instructions in ./gnuradio/gr-atsc/src/python/README to no success. Using the FFT we found 507.25M to have a strong signal. According to http://en.wikipedia.org/wiki/North_American_broadcast_television_frequencies#UHF_band this is channel 20. And according to http://www.fcc.gov/fcc-bin/tvq?state=AL&call=&arn=&city=&chan=14&cha2=69&serv=&type=0&facid=&list=2&dist=&dlat2=&mlat2=&slat2=&dlon2=&mlon2=&slon2=&size=9 this is WCOV from Montgomery, Alabama. So we do have the correct video carrier frequency, which I assume is the frequency we want to record and decode into a video. Question #1) Is the video carrier the one that carriers the video, or would it be the ATSC carrier? We then used: ./usrp_rx_cfile.py -s -d 10 -g 20 -f 507.25e6 atsc_data_6-4m_complex ./interp_short.py atsc_data_6-4m_complex ./xlate.py ./fpll.py ./btl-fsd.py ./viterbi-out.py test.mpeg Problems: /tmp/atsc_pipe_5 never fills with data. The output file, 'test.mpeg' is empty. Question #2) What do we need to fix to get /tmp/atsc_pipe_5 to fill. Question #3) What do we need to fix to get temp.mpeg to fill. Thank you, Bobby Black & Stephen Branch [email protected] (please do not blank out this email) black85 @ auburn . edu Bobby Black Auburn University [email protected] (334) 804-4826 _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
