[time-nuts] GPS 1 PPS accuracy limits

jimlux jimlux at earthlink.net
Wed Apr 21 01:59:20 UTC 2010

life speed wrote:
> Time Nuts;
> I have a customer request for a microwave frequency synthesizer with
> extreme accuracy requirements; 4 X 10^-11, or 0.04 PPB.  Obviously
> this is way out of quartz oscillator territory.  Is GPS 1
> pulse-per-second useable, or do they need an atomic clock?  Maybe
> they don't realize what they are spec'ing.

Do they have other requirements (Allan deviation? phase noise?)

Over what time span do they want 4E-11 accuracy? 1 second, 1000 seconds, 

A synthesizer locked to a Stanford Research PRS10 (datasheet accuracy 
5E-11) is in that ballpark.

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