op25/op25/gr-op25_repeater/apps/tx/README-fakecc.txt

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Generating and transmitting a fake trunking control channel
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1. After editing, run generate-tsbks.py which should generate
a file named "p25.out".
2. The tool generates the file packed form; it must be unpacked
./unpack.py -i p25.out -o sym-cc925.dat
3. The unpacked file must be referenced in the json cfg file:
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"source": "symbols:sym-cc925.dat",
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NOTE: in generate_tsbks.py, keys starting with "iden_up"
are used to define a channel band plan with bandwidth(bw),
channel spacing, and starting frequency in Hz; TX offset is in
MHz.
NOTE: with rx.py and multi_tx.py in tandem using the udp option,
the center frequency must be set in the rx.py trunking TSV
file equal to the device frequency in the multi_tx config.
As always, the control channel and voice channel frequencies
must fall inside the band defined by the center freqency and
sampling rate.