In the case of VHF, the link distance isn't all that far. Take your transmit clock and put a one shot after it. Put a pot on the one shot and adjust it for minimum "noise" on the RX signal. Very much like a fine tune knob. Low tech - yup. Ham type solution - yes indeed.
Bob On Feb 22, 2011, at 9:06 PM, Chris Albertson wrote: > On Tue, Feb 22, 2011 at 3:52 PM, Hal Murray <[email protected]> wrote: > >> A PPS signal from a GPS would provide a nice way to get started, but it needs >> a correction for the speed-of-light delay. I don't know if finding that >> delay would be easier or harder than traditional methods for getting the >> receiver in sync. > > Even in the best case there you have line of sight how do you know the > distance to the transmitter unless you know the location? Then if > there is bounces off the ionosphere or "wrong way" paths using the > longer of the two great circle paths. It gets very much harder > > I think GPS can help by using it to control the transmitter and to set > the receiver frequencies but the "phase" of the frequency hop clock is > determined by the time of flight of the signal, something a receiver > can't know in advance > > > > -- > ===== > Chris Albertson > Redondo Beach, California > > _______________________________________________ > 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. _______________________________________________ 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.
