Re: frequency/clock stability
- From: Dr. Anton T. Squeegee <SpammersBlow@xxxxxxxx>
- Date: Sun, 6 Aug 2006 09:00:04 -0700
In article <1154856361.566469.79490@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
PeterSmith1954@xxxxxxxxxxxxxx (known to some as PeteS) scribed...
maTheMatic wrote:
Hi,guys
I am a little confused about definition of clock/oscillator
stability. it is x ppm over some temperature range in common spec and
there usally another aging spec in addion to stability, so I assume the
stability was not very related with the measuring duration. but
recently I am read some material about atom clock which used in gps,
and they specify the stability with a duration(short or long) and it
seemed they assuming some unchanged temperature. so can any one help
me clarify the concept or recommend some reference?
x-posted to and followups set to sci.electronics.basics
Oscillator specs and crystal specs (often used as the frequency setting
element) vary a little.
Crystal specs usually state their stability across temperature, loading
capacitance, cal tolerance (initial accuracy) and long term ageing.
<snippety>
Great description, but one minor nitpick: There's no 'e' in the
word 'aging.' ;-)
Keep the peace(es).
--
Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute
(Known to some as Bruce Lane, KC7GR)
http://www.bluefeathertech.com -- kyrrin a/t bluefeathertech d-o=t calm
"Salvadore Dali's computer has surreal ports..."
.
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