Ulrich, What software do you use to monitor your 3805A and how do you connect to it?
Joe -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Ulrich Bangert Sent: Tuesday, July 13, 2010 7:05 AM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Any clock disturbances during the July 11solareclipse? 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.
