The only english text I'm able to find is: Analysis of the GPS frequency reference stability
Laboratory analysis of the dynamic behaviour of some GPS receivers has allowed to identify a criticality in their use as ‘clocks’ to synchronize DVB-T SFN networks. To fix this criticality, the Research Centre has defined a new criterion for the design of GPS equipment for use in broadcasting applications. This criterion is proposed as an Italian contribution to the ITU On Mon, Apr 4, 2016 at 10:10 PM, <tim...@timeok.it> wrote: > Here the italian version: > > http://www.crit.rai.it/eletel/2012-1/121-2.pdf > > Luciano > www.timeok.it > > > On Mon 04/04/16 21:28 , Magnus Danielson <mag...@rubidium.dyndns.org> wrote: > >> Hi Hal, >> >> On 04/04/2016 05:39 AM, Hal Murray wrote: >> > >> > Has anybody studied what happens when a GPSDO comes out of holdover? Has >> > anybody seen any specs? I don't think I have. >> > >> > I think you have a choice of quick recovery for time or frequency, but >> you >> > can't get both. >> > >> > Suppose your setup has been in holdover for a while. The frequency is >> > slightly off. The time offset of the PPS pulse will be the integral of >> the >> > frequency offset. >> > >> > What happens when you come out of holdover? If you fix the frequency, >> the >> > PPS will stay off. >> > >> > Suppose the PPS has drifted by 1 ns. If you correct that in 1 second, >> the >> > frequency will need to be off by 1E9 during that second. >> >> The RAI laboratory in Torino have made such tests and published >> measurements and recommendations. For a long time it was only available >> in italian, but there is now an english version available. >> >> Cheers, >> Magnus >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts [1] >> and follow the instructions there. >> >> >> >> Links: >> ------ >> [1] >> http://webmail.timeok.it/parse.php?redirect=https://www.febo.com/cgi-bin/ma >> ilman/listinfo/time-nuts >> > Message sent via Atmail Open - http://atmail.org/ > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.