1GEN_PACKETS(1)              General Commands Manual             GEN_PACKETS(1)
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NAME

6       gen_packets - Generate audio file for AX.25 frames.
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SYNOPSIS

11       gen_packets -o wav-file-out [ options ] [ text-file | - ]
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13              wav-file-out is the result.  The -o option is required.
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15              text-file  may  contain AX.25 packets in the standard monitoring
16              format.  Use "-" to  read  from  stdin.   If  not  specified,  a
17              default builtin message will be used.
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DESCRIPTION

21       gen_packets  is  a  test application which converts text to AX.25 audio
22       for testing packet decoders.
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24       It is very flexible allowing a wide range of audio sample  rates,  data
25       speeds,  and  AFSK  tones.  It will even generate the scrambled signals
26       commonly used for 9600 baud operation.
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OPTIONS

31       -a n   Signal amplitude in range of 0-200%.   Default  50.   Note  that
32              100%  is  corresponds  to  signal  peaks of +/- 16383 so we have
33              plenty of headroom to avoid saturation.
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36       -b n   Bits / second for data.  Default is 1200.
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39       -B n   Bits / second for data.  Proper modem selected  for  300,  1200,
40              9600.
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43       -g     Scrambled baseband rather than AFSK.
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46       -m n   Mark frequency.  Default is 1200.
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49       -s n   Space frequency.  Default is 2200.
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52       -r n   Audio sample Rate.  Default is 44100.
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55       -n n   Generate specified number of frames with increasing noise.  (For
56              built-in message only.)
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59       -o file
60              Send output to .wav file.
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63       -8     8 bit audio rather than 16.
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66       -2     2 channels of audio rather than 1.
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EXAMPLES

71       gen_packets -o x.wav
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73              With all defaults, a built-in test  message  is  generated  with
74              standard Bell 202 tones used for packet radio on ordinary VHF FM
75              transceivers.
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77       gen_packets -o x.wav -g -b 9600
78       gen_packets -o x.wav -B 9600
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80              Both of these are equivalent.  "-B 9600"  automatically  selects
81              scrambled baseband rather than AFSK.
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83       gen_packets -o x.wav -m 1600 -s 1800 -b 300
84       gen_packets -o x.wav -B 300
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86              Both  of  these generate 200 Hz shift, 300 baud, suitable for HF
87              SSB transceiver.
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89       echo -n 'WB2OSZ>WORLD:Hello, world!' | gen_packets -a 25 -o x.wav -
90       atest x.wav
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92              Read message from stdin and put quarter volume  sound  into  the
93              file x.wav.  Decode the sound file.
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SEE ALSO

96       More    detailed    information    is    in    the    pdf    files   in
97       /usr/local/share/doc/direwolf,  or  possibly   /usr/share/doc/direwolf,
98       depending on installation location.
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100       Applications  in  this package: aclients, atest, decode_aprs, direwolf,
101       gen_packets, ll2utm, log2gpx, text2tt, tt2text, utm2ll
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