[time-nuts] LF time signal emulation

Tom Van Baak tvb at LeapSecond.com
Mon Apr 30 09:24:25 EDT 2007


> Because I like to stand on the shoulders of giants, has anyone actually
> done something like this? My skills are more in software development and
> hardware digital logic rather than in LF radio transmitters - so any
> help or pointing in the right direction would be appreciated.
> 
> Regards,
> 
> 
> Jim Palfreyman

Yes, the following examples will generate a subcode:

http://www.leapsecond.com/notes/wwvb1.htm
http://www.leapsecond.com/notes/wwvb2.htm

Then use one of these TCO (time code output):

http://www.leapsecond.com/tools/tco1.c
http://www.leapsecond.com/tools/tco2.c

Then gate the output of a 60 kHz signal generator. I found
any piece of dangling wire was a sufficiently good antenna
to trigger reception in a WWVB radio clock.

I have untested versions for DCF77 also.

/tvb





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