readme update II
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@ -174,3 +174,42 @@ Options:
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-2, --phase2-tdma enable phase2 tdma decode
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-Z DECIM_AMT, --decim-amt=DECIM_AMT
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spectrum decimation
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MULTI-RECEIVER
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==============
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The multi_rx.py app allows an arbitrary number of SDR devices and channels
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to be defined. Each channel may have one or more plot windows attached.
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Configuration is achieved via a json file (see cfg.json for an example).
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In this version, channels are automatically assigned to the first device
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found whose frequency span includes the selected frequency.
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As of this writing (winter, 2017), neither trunking nor P25 P2/TDMA are
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supported in multi_rx.py. The rx.py app should be used for P25 trunking,
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for either P1/FDMA or P2/TDMA.
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Below is a summary of the major config file keys:
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demod_type: 'cqpsk' for qpsk p25 only; 'fsk4' for ysf/dstar/dmr/fsk4 p25
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filter_type: 'rc' for p25; 'rrc' for dmr and ysf; 'gmsk' for d-star
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plot: 'fft', 'constellation', 'datascope', 'symbol'
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[if more than one plot desired, provide a comma-separated list]
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destination: 'udp://host:port' or 'file://<filename>'
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name: arbitrary string used to identify channels and devices
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bug: 'fft' and 'constellation' currently mutually exclusive
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bug: 'gmsk' needs work
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Note: DMR audio for the second time slot is sent on the specified port number
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plus two. In the example 'udp://127.0.0.1:56122', audio for the first slot
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would use 56122; and 56124 for the second.
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The command line options for multi_rx:
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Usage: multi_rx.py [options]
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Options:
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-h, --help show this help message and exit
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-c CONFIG_FILE, --config-file=CONFIG_FILE
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specify config file name
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-v VERBOSITY, --verbosity=VERBOSITY
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message debug level
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-p, --pause block on startup
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