Hi Rob, The counter is free running and it has option fitted 4 fitted, a XOCO. After it was suggested I check the specs on the counter I obtained them and found that up to 2 Hz @ 10 MHz is in spec.... ( 6 months after Cal ) 200 Hz @ 1 GHz is in spec.... I was a bit disappointed
I usually run this setup the other way around, the Odetics supplying a 10 MHz reference to the counter, a specan and a sig gen but after being in storage for a few years I thought it better to check that it's all working.... Cheers and Thanks everyone for the direction / suggestions Rob. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Rob Kimberley Sent: Saturday, October 20, 2012 1:43 AM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Odetics 365 I've just re-read this post after looking at the replies. If the 365 is Time locked and showing and offset of 2.98E-13 then it looks to working fine, and I would suspect that it is the frequency counter oscillator that is drifting. Is the frequency counter free running or locked to any other standard? Rob Kimberley -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Rob S. Sent: 18 October 2012 07:40 To: [email protected] Subject: [time-nuts] Odetics 365 Hello Group, first time post I have just got my Odetics 365 working again after it being packed away for a few years. I have it connected to a HP 5386A frequency counter and am monitoring the 10 MHz output ( down to 0.01 Hz res ). I am noticing the frequency is drifting about 1.5 to 2 Hz over the day and settling low for a few hours ( aprox midday ) and then settling high about 12 hours later. The 365 is showing TFOM4 and Time locked, has a GDOP of 3.68 and displays a frequency error of +2.98E-013 and a Std error of Est of 4.80E-008. The averaging is turned off and it "see's" 3 to 5 satellites continuously. My question is would this be normal behavior ( + or - 2 Hz ) for this type of equipment or is it looking like I have something that is drifting a bit ? Also would switching the averaging on help ? Any thoughts would be appreciated Group, Thanks and Cheers, Rob. _______________________________________________ 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. _______________________________________________ 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.
