[time-nuts] OT: leaching was, Alternative time interval interpolation technique

[Said Jackson]

Hi Atila,

It's very hard to find a vendor making good (sc-cut) low PN crystals that are not in an ocxo. They are mostly designed to work at inflection points around 90C.

No good very low PN vcxos around unfortunately..

Bye Said

Sent From iPhone

On Aug 16, 2010, at 8:52, Attila Kinali <attila at kinali.ch> wrote:

> On Mon, 16 Aug 2010 07:58:01 +1200
> Bruce Griffiths <bruce.griffiths at xtra.co.nz> wrote:
> 
>> Such low jitter oscillators are readily available.
>> With some care (bandpass filtering) a cycle to cycle jitter of around 
>> 50fs or so is attainable with a Wenzel OCXO for example.
> 
> Apropos Wenzel: Is there any distributor that sells them in
> single quantities? Or do i have to get them from Wenzel directly?
> And is there any price list available?
> 
>> However the time interval jitter degrades as the time interval increases.
>> Achieving a cycle to cycle jitter of 1ps or so is relatively easy with a 
>> 10MHz or 100MHz OCXO having sufficiently low phase noise.
> 
> Why an OXCO? AFAIK the temperature has only an effect on long term
> stability/drift, but doesn't affect short term effects (which cause
> the jitters). Or am i missing something?
> 
>            Attila Kinali
> -- 
> If you want to walk fast, walk alone.
> If you want to walk far, walk together.
>        -- African proverb
> 
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