My Italian is not very good, but I think this is the English translation via ITU:
https://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-BT.2253-2012-PDF-E.pdf -Logan On Mon, Apr 4, 2016 at 1:10 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.