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multimon(1) [opensolaris man page]

MULTIMON(1)						      General Commands Manual						       MULTIMON(1)

NAME
multimon - program to decode radio transmissions SYNOPSIS
multimon [options] [input_file] DESCRIPTION
This manual page documents briefly the multimon command. This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page. The multimon software can decode a variety of digital transmission modes commonly found on UHF radio. A standard PC soundcard is used to acquire the signal from a transceiver. The decoding is done completely in software. Currently, the following modes are supported: * AX.25 o 1200 Baud AFSK o 2400 Baud AFSK (2 variants) o 4800 Baud HAPN o 9600 Baud FSK (G3RUH) * POCSAG o 512 Baud o 1200 Baud o 2400 Baud * Miscellaneous o DTMF o ZVEI o SCOPE An arbitrary set of the above modes may run concurrently on the same input signal (provided the CPU power is sufficient), so you do not have to know in advance which mode is used. Note however that some modes might require modifications to the radio (especially the 9600 baud FSK and the POCSAG modes) to work properly. AX.25 - Amateur Packet Radio protocol datagram format POCSAG (Post Office Code Standards Advisory Group) is a common paging transmission format. DTMF - Dual Tone Multi Frequency. Commonly used in in-band telephone dialing. ZVEI- The German Electrical and Electronic Manufacturers' Association - paging tone format. SCOPE - show samples in a rudimentary oscilloscope display on an X server. Multimon does not decode Morse code signals. OPTIONS
-t <type> input file type (any other type than raw requires sox) allowed types: raw aiff au hcom sf voc cdr dat smp wav maud vwe -a <demod> add demodulator -s <demod> subtract demodulator Where <demod> is one of: POCSAG512 POCSAG1200 POCSAG2400 EAS AFSK1200 AFSK2400 AFSK2400_2 HAPN4800 FSK9600 DTMF ZVEI SCOPE The -a and -s options may be given multiple times to specify the desired list of demodulators. EXAMPLE
Decode signal modulations from a sound file /tmp/message.wav without using a SCOPE display: multimon -s SCOPE -t wav /tmp/message.wav With no input file specified, the program listens directly to the sound card using the /dev/dsp interface. So to decode (only) DTMF tones on the sound card input: multimon -a DTMF NOTICE
Please note that monitoring commercial services may be prohibited in some countries, this software should therefore only be used to monitor the amateur radio service. SEE ALSO
gen(1) http://www.qsl.net/kb9mwr/projects/pager/Two-Tone%20Pager%20Decoding%20Using%20Multimon.pdf BUGS
The DTMF and ZVEI decoders have more frequent spurious detection reports. AUTHOR
This manual page was written by A. Maitland Bottoms <bottoms@debian.org>, for the Debian GNU/Linux system (but may be used by others). June 19, 2000 MULTIMON(1)

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BAYCOM(9)						      Kernel Reference Guide							 BAYCOM(9)

NAME
baycom - amateur (AX.25) packet radio network driver for baycom modems SYNOPSIS
#include <linux/baycom.h> #include <linux/hdlcdrv.h> DESCRIPTION
The driver currently supports three different modems: ser12, par96 and par97. ser12 This is a very simple 1200 baud AFSK modem. The modem consists only of a modulator/demodulator chip, usually a TI TCM3105. The computer is responsible for regenerating the receiver bit clock. The modem connects to a serial port, hence the name. Since the serial port is not used as an async serial port, the kernel driver for serial ports cannot be used, and this driver only supports standard serial hardware (8250, 16450, 16550). par96 This is a modem for 9600 baud FSK compatible to the G3RUH standard. The modem does all the filtering and regenerates the receiver clock. Data is transferred from and to the PC via a shift register. The shift register is filled with 16 bits and an interrupt is signalled. The PC then empties the shift register in a burst. This modem connects to the parallel port, hence the name. par97 This is a redesign of the par96 modem by Henning Rech, DF9IC. The modem is protocol compatible to par96, but uses only three low power ICs and can therefore be fed from the parallel port and does not require an additional power supply. IOCTL CALLS
The ioctl calls follow the implementation in the hdlcdrv. BAYCOMCTL_GETMODEMTYPE returns the modem type (i.e. ser12 or par96) and the options in effect (currently only the source of the DCD signal) BAYCOMCTL_SETMODEMTYPE sets the modem type and the options. Only superuser can do this. BAYCOMCTL_GETDEBUG return some debugging values. Not always available. SEE ALSO
baycom (9), soundmodem (9), linux/drivers/net/hdlcdrv.c, AUTHOR
baycom was written by Thomas Sailer, HB9JNX/AE4WA, (t.sailer@alumni.ethz.ch). Linux 2.1.x 2 October 1996 BAYCOM(9)
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