[time-nuts] Allan deviation -> finally some data!!!
didier at cox.net
Wed Oct 25 09:36:24 EDT 2006
---- Dr Bruce Griffiths <bruce.griffiths at xtra.co.nz> wrote:
> The apparent behaviour of your 10811's is far too good!!
> Over a period of 15,000 seconds the allan deviation should have reached
> a minimum and then increased as the effects of ageing manifest themselves.
> Either the oscillators are injection locked or your analysis is suspect.
> If the analysis were correct the performance approaches or even exceeds
> that of the most stable crystal oscillators ever built.
> This is extremely unlikely something has to be wrong.
It looks as if (I do not know for a fact, but I will check tonight when I am back at home) I measured the 10811 against itself, instead of against the 5370's time base. So what is being displayed is the noise in the trigger circuits of the 5370 and the delay in the cables.
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