Some models support synchronization to a external (PPS) reference. Take a look at http://leapsecond.com/pic/picdiv.htm
Edésio On Thu, Jul 21, 2016 at 10:05:15AM -0400, Scott Stobbe wrote: > I think you will have to decided if you want both your xo (presumably 10 > MHz) and PPS to be phase aligned to UTC. No matter which way you go you > will have propagation delay across a clock divider. If you just want your > PPS to be on phase, you can steer your xo. > > On Thu, Jul 21, 2016 at 12:11 AM, Bob Stewart <[email protected]> wrote: > > > For my next GPSDO board revision, I would like to include one of Tom's > > PICDiv devices to give a much better 1PPS out than the Ublox receivers are > > capable of. This means that it has to be started (or slewed to be) exactly > > on time. So I was wondering if anyone had experimented in controlling the > > startup of one of these PICDivs to make them in sync, and if you'd be > > willing to share your solution before I start digging into it. I haven't > > yet looked at the source code for any of these devices, but it's my > > understanding that this feature isn't provided, and is deemed to be > > difficult due to the input divider making for a large steering step. Even > > a suggestion as to which of the chips would be the best candidate would be > > much appreciated. I'm looking for a method that's deterministic, rather > > than starving the PICDiv of clock cycles and waiting for the 1PPS to match > > a conveniently correct 1PPS from the Ublox. > > > > Bob - AE6RV > > ----------------------------------------------------------------- > > AE6RV.com > > > > GFS GPSDO list: > > groups.yahoo.com/neo/groups/GFS-GPSDOs/info > > _______________________________________________ > > 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. _______________________________________________ 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.
