[time-nuts] Rubidium Performance
jmiles at pop.net
Mon Feb 6 03:42:13 UTC 2012
(Sorry for the dupe, not sure how that happened...)
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-
> bounces at febo.com] On Behalf Of John Miles
> Sent: Sunday, February 05, 2012 1:46 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Rubidium Performance
> > John
> > Thank you for your effort. It would be nice if you could confirm the 4
> > Hz dither that seems to be the loop time constant and long term aging
> > will influence the GPS/Rb control loop time constant setting. I did see
> > E-12 per month which may be unique to that unit.
> > Bert Kehren
> There's a lot of impulse-like structure in the 10 MHz signal from the
> I have, certainly. You can see the spikes here that are associated with
> the spurs at multiples of 1 Hz in the earlier PN plot, as well as some
> stronger pulses that show up about every 28 seconds. They might
> to the grand repetition rate of the DDS.
> I don't see anything specific around 4-5 Hz except for the 1 Hz harmonics.
> -- john
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