[time-nuts] GPS 1 PPS accuracy limits

Magnus Danielson magnus at rubidium.dyndns.org
Tue Apr 20 16:07:03 EDT 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.

I really think you should ask them to motivate themselves on that spec, 
the intended use etc. They can certainly get a spec like that, but is it 
what they need?

You certainly want something like a GPS clock to feed that thing if they 
really need that level of accuracy. Or do they only need that level of 


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