[time-nuts] STEL-1173/CM Source

Magnus Danielson magnus at rubidium.dyndns.org
Wed Dec 17 23:37:21 EST 2014


On 11/15/2014 04:38 PM, Ed Palmer wrote:
> Yes, I'm sure.  I did check the cabling. :)  If I was somehow measuring
> the Tbolt or 4065A against itself, there wouldn't be any frequency offset.
> The Oscilloquartz 3210 (which appears to be an OEM'd 4065A) is spec'ed
> at 3E-13 @ 100K seconds.  The 4065C is even better at 8.5E-14 with a
> noise floor of 5E-14.

My OSA 3210 is not the same core as 4065A.

> My data run is continuing.  The end of the graph is flopping around as
> usual, but it's now showing Total Deviation of about 1.4E-13 @ 100K
> seconds with a total of 226 800 readings at 1 second intervals.
> Frequency offset error is still 6E-13.  Autocorrelation of the results
> shows diurnal spikes at approximately 86 160 and 172 310 seconds (i.e.
> one and two sidereal days).

Most likely thermal sensitivity.

Got myself some STEL 1173 in PLCC 44 from that source. Thanks for 
sharing link!


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