> Arecibo did a kind of cute trick with their distributed 1PPS. The one > second pulses were of one length > (100 ns as I recall), but the 10 sec boundaries had the pulses be about > twice that length. One could carry > this scheme to considerable lengths as desired.
Dana, One version of this would be to make the pulse width 100 ns * (1+STOD), where STOD (Seconds-Time-Of-Day) varies from 00000 to 86399. So your pulse width would vary from 100 ns to 8640000 ns = 8.64 ms. If 100 ns is too short use a range of, say, 1 us to 86400 us (86.4 ms). Maybe there's a reason no one has implemented this but I always thought it would be a cool self-clocking, self-identifying, IRIG-like format. And trivial to implement both the sender and receiver with a microcontroller /tvb _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
