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DCF77GEN(1)		    General Commands Manual		   DCF77GEN(1)

NAME
       dcf77gen	- soundcard DCF77 (and HBG) transmitter

SYNOPSIS
       dcf77gen	[-a audio device] [-s] [-n] [-v	verboselevel] [-g] [-l]	[-u]

DESCRIPTION
       dcf77gen	 is a soundcard	modulator for time reference signals. Its for-
       mat can be set to either	DCF77 or HBG dcf77rx

   OPTIONS
       -a     specify the path to  the	sound  driver  (default:  /dev/dsp  on
	      Linux, /dev/audio	on Solaris).

       -s     use  standard  output  instead  of  audio	output.	Format is 8kHz
	      16bit words 1 channel in the endianness of the CPU.

       -n     do not use the `mmap()` way of approaching the soundcard,	 which
	      means,  do not read directly from	the soundcard dma buffer. Some
	      soundcards do not	support	mmap mode. This	option	is  experimen-
	      tal, it is not yet tested	how good the results will be!

       -v     Set the verbosity	level (1-2, default 0).	The higher the number,
	      the more debugging information is	written	to standard error.

       -g     HBG mode.

       -l     Transmitter uses LSB (lower sideband) mode.

       -u     Transmitter uses USB (upper sideband) mode.

       -z     Transmit the time	in MESZ	timezone; if not specified, it	trans-
	      mits MEZ.

BUGS
       The  program uses the system time at startup and	then derives the clock
       from the	soundcard. It could be made a command line parameter to	 spec-
       ify transmit time.

       In order	to build a it would require a very accurate reference clock.

CREDITS
       Hans-Guenter DF4OX/DL0PTB sent me printed documentation about the DCF77
       transmission format which helped	me a lot.

AUTHOR
       Thomas Sailer, HB9JNX/AE4WA, sailer@ife.ee.ethz.ch

HB9JNX				DCF77 utilities			   DCF77GEN(1)

NAME | SYNOPSIS | DESCRIPTION | BUGS | CREDITS | AUTHOR

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