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  1. root@RPI-pocsag:~# rtl_fm -f 169.625M -M fm -s 2400 -p 83 -g 30 | multimon-ng -a POCSAG -t raw /dev/stdin
  2. Found 1 device(s):
  3. invalid mode "POCSAG"
  4. multimon-ng (C) 1996/1997 by Tom Sailer HB9JNX/AE4WA
  5. (C) 2012-2014 by Elias Oenal
  6. available demodulators: POCSAG512 POCSAG1200 POCSAG2400 FLEX EAS UFSK1200 CLIPFSK FMSFSK AFSK1200 AFSK2400 AFSK2400_2 AFSK2400_3 HAPN4800 FSK9600 DTMF ZVEI1 ZVEI2 ZVEI3 DZVEI PZVEI EEA EIA CCIR MORSE_CW DUMPCSV SCOPE
  7.  
  8. Usage: multimon-ng [file] [file] [file] ...
  9. If no [file] is given, input will be read from your default sound
  10. hardware. A filename of "-" denotes standard input.
  11. -t <type> : Input file type (any other type than raw requires sox)
  12. -a <demod> : Add demodulator
  13. -s <demod> : Subtract demodulator
  14. -c : Remove all demodulators (must be added with -a <demod>)
  15. -q : Quiet
  16. -v <level> : Level of verbosity (e.g. '-v 3')
  17. For POCSAG and MORSE_CW '-v1' prints decoding statistics.
  18. -h : This help
  19. -A : APRS mode (TNC2 text output)
  20. -m : Mute SoX warnings
  21. -r : Call SoX in repeatable mode (e.g. fixed random seed for dithering)
  22. -n : Don't flush stdout, increases performance.
  23. -e : POCSAG: Hide empty messages.
  24. -u : POCSAG: Heuristically prune unlikely decodes.
  25. -i : POCSAG: Inverts the input samples. Try this if decoding fails.
  26. -p : POCSAG: Show partially received messages.
  27. -f <mode> : POCSAG: Disables auto-detection and forces decoding of data as <mode>
  28. (<mode> can be 'numeric', 'alpha' and 'skyper')
  29. -b <level> : POCSAG: BCH bit error correction level. Set 0 to disable, default is 2.
  30. Lower levels increase performance and lower false positives.
  31. -o : CW: Set threshold for dit detection (default: 500)
  32. -d : CW: Dit length in ms (default: 50)
  33. -g : CW: Gap length in ms (default: 50)
  34. -x : CW: Disable auto threshold detection
  35. -y : CW: Disable auto timing detection
  36. Raw input requires one channel, 16 bit, signed integer (platform-native)
  37. samples at the demodulator's input sampling rate, which is
  38. usually 22050 Hz. Raw input is assumed and required if piped input is used.
  39. 0: Realtek, RTL2838UHIDIR, SN: 00000001
  40.  
  41. Using device 0: Generic RTL2832U OEM
  42. Found Rafael Micro R820T tuner
  43. Tuner gain set to 29.70 dB.
  44. Tuner error set to 83 ppm.
  45. Tuned to 169875200 Hz.
  46. Oversampling input by: 417x.
  47. Oversampling output by: 1x.
  48. Buffer size: 8.19ms
  49. Exact sample rate is: 1000800.030542 Hz
  50. Sampling at 1000800 S/s.
  51. Output at 2400 Hz.
  52. Signal caught, exiting!
  53.  
  54. User cancel, exiting...
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