project:sdr:szdc
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project:sdr:szdc [2014/07/29 22:35] – pinky | project:sdr:szdc [2016/08/09 02:55] (current) – [szdc] jenda | ||
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+ | ====== szdc ====== | ||
+ | **szdc** is a receiver for a specific inverse tone coded squelch used by a certain railway network. It uses [[: | ||
+ | |||
+ | If the channel is active for too long (see guard in constants.h), | ||
+ | |||
+ | Edit run.sh to suit your needs. Edit constants.h (number of channels, SNR). | ||
+ | < | ||
+ | $ make | ||
+ | $ ./run.sh | ||
+ | Using Volk machine: avx_666 | ||
+ | snr: 54 31 51 58 60 61 59 32 58 57 61 mask: | ||
+ | snr: 54 30 50 58 61 62 59 32 60 58 62 mask: | ||
+ | Opening new file 2016-08-09-02-47-13.8.cfile | ||
+ | snr: 42 29 52 57 60 62 50 37 4 50 52 mask: | ||
+ | snr: 53 29 50 57 60 62 59 32 3 53 53 mask: | ||
+ | snr: 46 27 52 58 61 62 57 50 55 51 58 mask: | ||
+ | snr: 53 28 51 58 61 62 59 48 55 57 61 mask: | ||
+ | snr: 53 32 50 57 59 61 59 36 56 56 59 mask: | ||
+ | closing 8 | ||
+ | snr: 37 26 53 57 61 62 46 33 59 53 61 mask: | ||
+ | ... | ||
+ | </ | ||
+ | |||
+ | To decode audio, you can use for example mfm.py from [[: | ||
+ | < | ||
+ | cat foo.cfile | mfm.py -r 0.520833 # 25/48 kHz | ||
+ | </ | ||
+ | |||
+ | ===== Obtaining szdc ===== | ||
+ | |||
+ | * git clone https:// | ||
+ | * https:// | ||
+ | |||
+ | ===== links ===== | ||
+ | * [[http:// | ||
+ | * [[http:// |
project/sdr/szdc.txt · Last modified: 2016/08/09 02:55 by jenda