[Discuss-gnuradio] ATSC demod tips

[Ken Harris]

        I just got a USRP, and I'm learning how it works.

        I'm having trouble getting the ATSC demod to work.

        The WFM demod works OK, so I know the antenna, etc works.

	I know I'm tuning the right frequency (KQED with a center 
frequency of 569MHz), because I can see the signal with usrp_fft.

	I got a few underruns during the "usrp_rx_cfile".  About 10 in 10 
seconds.  The raw data file is 446 meg.

	I get an empty output file and a file named "taps.txt", which is 
also empty.

	I tried both the Gnuradio v3.1.2 (in Fedora 9) and the Gnuradio 
from SVN.

	I get a few output strings, like ">>> gr_fir_fff: using SSE" from 
btl-fsd and ">>> gr_fir_fff: using SSE
Setting initial_freq: 3065000.000000" from fpll

        Do you have any tips on finding the problem?

        Thanks.