Hi Magnus,
On Fri, 29 Nov 2013 17:42:25 +0100
Magnus Danielson <[email protected]> wrote:
> >> When I look in the data sheets of oscillator that I find on the internet,
> >> they only have precision estimates like 1ppm or 1ppb, but no detailed allan
> >> variance graphs.
> > Yes. Because in the class of cheap AT cut oscillators, you dont worry about
> > allan variance. The instability due to temperature dependence of your
> > system is much higher than the temperature-free (in)stability. The ADEV
> > becomes "relevant" only after you do at least a temperature compensation
> > or temperature control.
> The specification for temperature variations is a poor excuse too. Some
> vendors have learned that the hard way.
Could you explain a little bit what you mean here? I don't think
i get exactly what you are hinting at.
Attila Kinali
--
1.) Write everything down.
2.) Reduce to the essential.
3.) Stop and question.
-- The Habits of Highly Boring People, Chris Sauve
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