Yes, already done: the DCF77 VLF time transmitter and others. On Tue, Jun 26, 2012 at 3:15 PM, Clayton G <[email protected]> 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) > > > ______________________________**_________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
