gen_packets - Generate audio file for AX.25 frames.

gen_packets is a test application which converts text to AX.25 audio for testing packet decoders.

       It is very flexible allowing a wide range of audio sample rates, data speeds, and AFSK  tones.   It  will
       even generate the scrambled signals commonly used for 9600 baud operation.

gen_packets-ox.wav

              With all defaults, a built-in test message is generated with standard  Bell  202  tones  used  for
              packet radio on ordinary VHF FM transceivers.

       gen_packets-ox.wav-g-b9600gen_packets-ox.wav-B9600

              Both  of  these  are  equivalent.   "-B 9600" automatically selects scrambled baseband rather than
              AFSK.

       gen_packets-ox.wav-m1600-s1800-b300gen_packets-ox.wav-B300

              Both of these generate 200 Hz shift, 300 baud, suitable for HF SSB transceiver.

       echo-n'WB2OSZ>WORLD:Hello,world!'|gen_packets-a25-ox.wav-atestx.wav

              Read message from stdin and put quarter volume sound into the file x.wav.  Decode the sound file.

       gen_packets - Generate audio file for AX.25 frames.

-an   Signal  amplitude  in range of 0-200%.  Default 50.  Note that 100% is corresponds to signal peaks
              of +/- 16383 so we have plenty of headroom to avoid saturation.

       -bn   Bits / second for data.  Default is 1200.

       -Bn   Data rate in bits/sec for first channel.  Standard values are 300, 1200, 2400, 4800, 9600.
                     300 bps defaults to AFSK tones of 1600 & 1800.
                     1200 bps uses AFSK tones of 1200 & 2200.
                     2400 bps uses QPSK based on V.26 standard.
                     4800 bps uses 8PSK based on V.27 standard.
                     9600 bps and up uses K9NG/G3RUH standard.
                     EAS for Emergency Alert System (EAS) Specific Area Message Encoding (SAME).

       -g     Force G3RUH modem regardless of data rate.

       -j     2400 bps QPSK compatible with Dire Wolf <= 1.5.

       -J     2400 bps QPSK compatible with MFJ-2400.

       -Xn   1 to enable FX.25 transmit.  16, 32, 64 for specific number of check bytes.

       -In   Enable IL2P transmit.  n=1 is recommended.  0 uses weaker FEC.

       -in   Enable IL2P transmit, inverted polarity.  n=1 is recommended.  0 uses weaker FEC.

       -mn   Mark frequency.  Default is 1200.

       -sn   Space frequency.  Default is 2200.

       -rn   Audio sample Rate.  Default is 44100.

       -nn   Generate specified number of frames with increasing noise.  (For built-in message only.)

       -ofile
              Send output to .wav file.

       -8     8 bit audio rather than 16.

       -2     2 channels of audio rather than 1.

       -vmax[,incr]
              Variable speed with specified maximum error and optional increment.

       More detailed information is in the PDF files at https://github.com/wb2osz/direwolf/tree/master/doc/.

       Applications in this package: aclients,  atest,  cm108,  decode_aprs,  direwolf,  gen_packets,  kissutil,
       ll2utm, log2gpx, text2tt, tt2text, utm2ll

                                                                                                  GEN_PACKETS(1)

gen_packets-owav-file-out [ options ] [ text-file | - ]

              wav-file-out is the result.  The -o option is required.

              text-file  may  contain  AX.25  packets  in  the standard monitoring format.  Use "-" to read from
              stdin.  If not specified, a default builtin message will be used.