Thanks Ulrich 2 E -10 seems high and a straight line on a double oven is what I would expect, looking at a month or two may tell more. Also what is the change in ambient temperature? With Rubidiums in the less than $100 range I think it is the best bang for a buck. I am still waiting for the final results of the three testers of the Dual Mixer but once it is completed I will test the combination of a M100 with a selected HP 10811 replacing the internal Xtal Osc. and using the 60 second loop of the HP 5061B. Bert In a message dated 7/13/2010 9:42:05 A.M. Eastern Daylight Time, df...@ulrich-bangert.de writes:
Bert, I am really unsure whether the drift alone should make me think that the parts are bad. If the drift can be modelled well by the regulation loop (and the Z3805's software seems to do so) it can well be compesated for. Unfortunately even here is no real expert for MTI stuff who could tell us more about MTI stuff. Best regards Ulrich > -----Ursprungliche Nachricht----- > Von: time-nuts-boun...@febo.com > [mailto:time-nuts-boun...@febo.com] Im Auftrag von ewkeh...@aol.com > Gesendet: Dienstag, 13. Juli 2010 14:42 > An: time-nuts@febo.com > Betreff: Re: [time-nuts] Any clock disturbances during the > July 11solareclipse? > > > Ulrich, > thank you for the info. I think that 2 E-10 per dayis the > best argument > for any Rubidium. > Bert > > > In a message dated 7/13/2010 8:05:25 A.M. Eastern Daylight Time, > df...@ulrich-bangert.de writes: > > Bert, > > lacking a 3805 manual my guess is that the 3805 EFC scale > may be considered the same as the 3801's one. Which would > lead to the conclusion that 1 EFC unit equals roughly > 1.0E-12 of relative frequency change of the LO. > > Symmetricon seems to have believed that the MTI 260 type > double oven OCXOs in the Z3805 are superiour to the 10811 > double oven OCXOs used in the > Z3801. > However, even after months of being in action, their drift > is still very high. If the above assumption is right what you > see in the graph in general is a drift of 2.0E-10 per day. I > do not notice any diurnal changes on the EFC due to > day/night temperature variations which are otherwise the > biggest environmental impact on oscillator frequency > variations. So, despite of the drift the MTI 260 seem to be > very "predictable" beasts which leads to holdover > uncertainities that are mostly way below 1 microsecond for a > 24 h interval. > > Best regards > Ulrich > > > -----Ursprungliche Nachricht----- > > Von: time-nuts-boun...@febo.com > > [mailto:time-nuts-boun...@febo.com] Im Auftrag von ewkeh...@aol.com > > Gesendet: Dienstag, 13. Juli 2010 12:21 > > An: time-nuts@febo.com > > Betreff: Re: [time-nuts] Any clock disturbances during the > > July 11 solareclipse? > > > > > > Ulrich > > not having a 3805 can you please explain the scale. > > Thank you > > Bert Kehren > > > > > > In a message dated 7/13/2010 6:12:47 A.M. Eastern Daylight Time, > > df...@ulrich-bangert.de writes: > > > > Antonio, > > > > attached is a recording of my Z3805's EFC along July 11. > > Times are in UTC. > > > > Best regards > > Ulrich > > > > > -----Ursprungliche Nachricht----- > > > Von: time-nuts-boun...@febo.com > > > [mailto:time-nuts-boun...@febo.com] Im Auftrag von > iov...@inwind.it > > > Gesendet: Montag, 12. Juli 2010 22:19 > > > An: time-nuts@febo.com > > > Betreff: [time-nuts] Any clock disturbances during the July > > > 11 solar eclipse? > > > > > > > > > > > > Hi all, > > > > > > did anybody out there observe any disturbances in his clocks > > > during (and/or > > > before or after) the July 11 solar eclipse? > > > (due to other duties I've been prevented from doing any tests) > > > > > > Thanks, > > > Antonio I8IOV > > > > > > _______________________________________________ > > > 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. > > > > _______________________________________________ > > 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. > > _______________________________________________ > 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. _______________________________________________ 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.
