Merge commit 'v3.3.0' into upstream

[debian/gnuradio] / gr-atsc / src / python / README

diff --git a/gr-atsc/src/python/README b/gr-atsc/src/python/README
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+Decoding ATSC using 19.2MSps rate over 5 processes
+--------------------------------------------------
+
+1) Verify signal, adjust antenna and find best gain setting using usrp_fft.py,
+station frequency from the fcc video database, and decimation of 10.
+
+2) Capture data - adjust gain (-g) frequency (-f) and which side
+the tvrx is on to fit your local setup:
+
+usrp_rx_cfile.py -s -R B -d 10 -g 65 -f 503e6 atsc_data_6-4m_complex 
+
+You probably still need fast disks to take the data, like a raid-0 set of
+striped sata drives. Make sure there are no or very few Ou overruns. Saving
+the raw usrp data in 'short' form halves the disk space/bus bandwidth that
+the usual complex form uses.
+
+3) Make pipes:
+
+mkfifo /tmp/atsc_pipe_1
+mkfifo /tmp/atsc_pipe_2
+mkfifo /tmp/atsc_pipe_3
+mkfifo /tmp/atsc_pipe_4
+mkfifo /tmp/atsc_pipe_5
+
+4) In seperate windows run processes:
+
+./interp_short.py <input rf data at 6.4Msps>
+./xlate.py
+./fpll.py
+./btl-fsd.py
+./viterbi-out.py <output mpeg transport stream>
+
+
+