[time-nuts] OT: leaching was, Alternative time interval interpolation technique
lists at rtty.us
Mon Aug 16 16:02:58 UTC 2010
Single cycle jitter is a bit confusing when you talk about bandwidths of 5Hz
to 20 MHz off a carrier. Since phase noise at 5 Hz does contribute to jitter
over that bandwidth, an OCXO (with good phase noise close in) would be
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Attila Kinali
Sent: Monday, August 16, 2010 11:53 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] OT: leaching was, Alternative time interval
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?
If you want to walk fast, walk alone.
If you want to walk far, walk together.
-- African proverb
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