On 6/26/2012 9:15 AM, Clayton G wrote:
Hi Nuts,
I have been building an LF transmitter, and have provision for a 1PPS
input for calibration purposes. However I would like to be able to
provide more time information than just the second pulses. It occurs
to me that full time info 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.
Regards
Clayton
(VK1TKA)
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I think you describe modifying IRIG. Just a thought
Regards
Paul.
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