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[Discuss-gnuradio] ATSC demod tips
From: |
Ken Harris |
Subject: |
[Discuss-gnuradio] ATSC demod tips |
Date: |
Thu, 11 Sep 2008 16:38:22 -0700 (PDT) |
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.
- [Discuss-gnuradio] ATSC demod tips,
Ken Harris <=