[time-nuts] Frequency Stability of Trimble Mini-T
saidjack at aol.com
Fri Oct 17 00:35:18 UTC 2008
Would love to see the efc chart on the mini-t when a jump occurs. That
would give a definate result...
On Oct 16, 2008, at 12:36, "Tom Van Baak" <tvb at LeapSecond.com> wrote:
>> I can't find much fundamental research on this at all; and if even
>> Mr. Vig
>> says the phenomenon is not well understood.. But there are
>> (propriatary) ways
>> to probe for the susceptibility of a particular unit to do this.
> John told me once that an easy way to deal with many classes
> of jumps is simply use a pair of OCXO. This is an easy solution
> for a time-nut (driven by interest and passion), perhaps much
> less so for a manufacturer (driven by market and profit).
> If we as a group find that unpredictable phase or frequency
> jumps are limiting GPSDO performance then that would be a
> fun group discussion on how best to implement a N-way XO
> GPSDO. If done to the extreme it could also reduce phase
> noise as a by-product.
> But let's not jump (!) to conclusions that Mike's problem is
> necessarily all quartz related. Given how little testing any of
> us have done on this particular GPSDO, speculation should
> take a back seat to measurement.
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