[time-nuts] Allan deviation -> finally some data!!!

[Ulrich Bangert]

Hi Didier,

the sigma-tau plot looks indeed strange! Can you send me the data file
for some tests with it?

73 de Ulrich, DF6JB

> -----Ursprüngliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Didier Juges
> Gesendet: Mittwoch, 25. Oktober 2006 15:36
> An: Discussion of precise time and frequency measurement
> Betreff: Re: [time-nuts] Allan deviation -> finally some data!!!
> 
> 
> 
> ---- 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.
> > 
> > Bruce
> 
> 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.
> 
> Didier
> 
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