NAME

       gen_packets - Generate audio file for AX.25 frames.

SYNOPSIS

       gen_packets -o wav-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.

DESCRIPTION

       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.

OPTIONS

       -a n   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.

       -b n   Bits / second for data.  Default is 1200.

       -B n   Bits / second for data.  Proper modem selected for 300, 1200, 9600.

       -g     Scrambled baseband rather than AFSK.

       -m n   Mark frequency.  Default is 1200.

       -s n   Space frequency.  Default is 2200.

       -r n   Audio sample Rate.  Default is 44100.

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

       -o file
              Send output to .wav file.

       -8     8 bit audio rather than 16.

       -2     2 channels of audio rather than 1.

EXAMPLES

       gen_packets -o x.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 -o x.wav -g -b 9600
       gen_packets -o x.wav -B 9600

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

       gen_packets -o x.wav -m 1600 -s 1800 -b 300
       gen_packets -o x.wav -B 300

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

       echo -n 'WB2OSZ>WORLD:Hello, world!' | gen_packets -a 25 -o x.wav -
       atest x.wav

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

SEE ALSO

       More  detailed  information  is  in  the  pdf  files  in /usr/local/share/doc/direwolf, or
       possibly /usr/share/doc/direwolf, depending on installation location.

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

                                                                                   GEN_PACKETS(1)