mirror of https://github.com/wb2osz/direwolf.git
113 lines
2.5 KiB
Groff
113 lines
2.5 KiB
Groff
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.TH GEN_PACKETS 1
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.SH NAME
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gen_packets \- Generate audio file for AX.25 frames.
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.SH SYNOPSIS
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.B gen_packets -o
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.I wav-file-out
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[ \fIoptions\fR ] [ \fItext-file\fR | - ]
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.RS
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.P
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\fIwav-file-out\fR is the result. The -o option is required.
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.P
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\fItext-file\fR 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.
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.RE
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.SH DESCRIPTION
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\fBgen_packets\fR is a test application which converts text to AX.25 audio for testing packet decoders.
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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.
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.SH OPTIONS
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.TP
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.BI "-a " "n"
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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.
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.TP
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.BI "-b " "n"
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Bits / second for data. Default is 1200.
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.TP
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.BI "-B " "n"
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Bits / second for data. Proper modem selected for 300, 1200, 9600.
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.TP
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.BI "-g"
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Scrambled baseband rather than AFSK.
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.TP
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.BI "-m " "n"
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Mark frequency. Default is 1200.
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.TP
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.BI "-s " "n"
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Space frequency. Default is 2200.
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.TP
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.BI "-r " "n"
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Audio sample Rate. Default is 44100.
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.TP
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.BI "-n " "n"
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Generate specified number of frames with increasing noise. (For built-in message only.)
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.TP
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.BI "-o " "file"
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Send output to .wav file.
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.TP
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.B "-8"
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8 bit audio rather than 16.
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.TP
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.B "-2"
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2 channels of audio rather than 1.
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.SH EXAMPLES
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.P
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.B gen_packets -o x.wav
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.P
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.RS
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With all defaults, a built-in test message is generated
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with standard Bell 202 tones used for packet radio on ordinary
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VHF FM transceivers.
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.RE
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.P
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.B gen_packets -o x.wav -g -b 9600
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.PD 0
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.P
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.PD
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.B gen_packets -o x.wav -B 9600
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.P
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.RS
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Both of these are equivalent. "-B 9600" automatically selects scrambled baseband rather than AFSK.
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.RE
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.P
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.B gen_packets -o x.wav -m 1600 -s 1800 -b 300
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.PD 0
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.P
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.PD
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.B gen_packets -o x.wav -B 300
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.P
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.RS
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Both of these generate 200 Hz shift, 300 baud, suitable for HF SSB transceiver.
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.RE
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.P
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.B echo -n "WB2OSZ>WORLD:Hello, world!" | gen_packets -a 25 -o x.wav -
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.P
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.RS
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Read message from stdin and put quarter volume sound into the file x.wav.
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.RE
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.P
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.SH SEE ALSO
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More detailed information is in the pdf files in /usr/local/share/doc/direwolf, or possibly /usr/share/doc/direwolf, depending on installation location.
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Applications in this package: aclients, atest, decode_aprs, direwolf, gen_packets, ll2utm, log2gpx, text2tt, tt2text, utm2ll
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