gen_packets - Generate audio file for AX.25 frames.
gen_packets -o wav-file-out
] [ text-file
| - ]
is the result. The -o option is required.
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.
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.
- -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,
- 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 bit audio rather than 16.
gen_packets -o x.wav
- 2 channels of audio rather than 1.
With all defaults, a built-in test message is
generated with standard Bell 202 tones used for packet radio on ordinary VHF
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 -
Read message from stdin and put quarter volume
sound into the file x.wav. Decode the sound file.
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