Am 26.06.2012 18:12, schrieb Bob Camp:
fo could be encoded onto a 1PPS stream by changing the width of the pulse
itself. The rising edge can be left unchanged to indicate the precise
second, but the trailing edge can vary between (say) 100mSec and 300mSec,
and this could encode 60 bits (with suitable idle pulses etc for
synchronisation) in each minute. Using this I could encode full date and
time into the 1PPS stream.
My question is, does such a standard already exist, or has anyone developed
something along this line?
If no, I plan to implement something suitable myself, and will publish it
should it be useful to others.
You could recycle the DCF77 format:
<http://www.ptb.de/cms/en/fachabteilungen/abt4/fb-44/ag-442/dissemination-of-legal-time/dcf77.html>
There seem to be decoders for it on the net.
regards, Gerhard
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