Magnus, How did you 'jump' the PPS on the FE-5680A? Is it a serial command? How do you 'sync' it to the external PPS from say a TBolt?
Joe -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Magnus Danielson Sent: Tuesday, January 24, 2012 12:51 PM To: [email protected] Subject: Re: [time-nuts] Determination of the placement of the first pps On 01/24/2012 12:42 PM, J. L. Trantham wrote: > Thanks Chris. > > It seems such a logical feature to have, I would think it would have > been included perhaps by a serial command. My old CS clocks have this > feature though I have never taken the time to sync them. "Jumping" the PPS into about the right phase is done within a second and is well worth the effort. I use this myself and it works well. Forcing "sync" on atomic clocks is badly needed. The frequency steering range is small so frequency limit sideways would take ages. Cheers, Magnus > Joe > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > On Behalf Of Chris Albertson > Sent: Tuesday, January 24, 2012 12:34 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Determination of the placement of the first > pps > > > On Mon, Jan 23, 2012 at 5:50 PM, J. L. Trantham<[email protected]> wrote: >> Is this, in any way, related to the fact the Earth has a Moon? >> >> is there a way to >> 'sync' the 1 PPS output of an FE-5680A to an external signal, such as >> a GPS receiver or TBolt? I would think that might be possible given >> their original purpose. > > The 1PPS is not in the units specs. It is just by luck that it works. > However we could adjust the phase of the 1PPS by running the unit > fast or slow for some period of time and then going back to exact > 10MHz. But that method could take a LONG time, like tens of thousands > of seconds. Better I think to test the phase and if it is "off" by > more than say, 0.01 second to just power the unit off and restart and > see what luck gives you. I bet 100 power cycles is faster than > moving the phase by 0.5 seconds. > > Maybe the answer is to wire up a few decade divers and divide the > 10MHz to 1pps yourself. Thenyou can let a known good PPS reset your > counters and get the phase correct instantly > > > > > > _______________________________________________ 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.
