[time-nuts] Encoded 1PPS signals

[Brooke Clarke]

Hi Clayton:

Check out WWVB.

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html

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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