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gen_packets - Online in the Cloud

Run gen_packets in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command gen_packets that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



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

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

-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 -

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

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