Provided by: direwolf_1.5+dfsg-2_amd64
gen_packets - Generate audio file for AX.25 frames.
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.
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.
-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.
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.
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)