Careful, there's no such thing as a free lunch. Reducing the power to the
oscillator improves the long-term stability (drift) at the expense of
short-term stability.
-RL
------------------------------------------------------------
Robert Lutwak, Senior Scientist
Symmetricom - Technology Realization Center
34 Tozer Rd.
Beverly, MA 01915
(978) 232-1461 Voice [EMAIL PROTECTED] (Business)
(978) 927-4099 FAX [EMAIL PROTECTED] (Personal)
(339) 927-7896 Mobile
----- Original Message -----
From: "Brooke Clarke" <[EMAIL PROTECTED]>
To: "Richard H McCorkle" <[EMAIL PROTECTED]>; "Discussion of precise
time and frequency measurement" <[email protected]>
Sent: Sunday, October 23, 2005 2:29 PM
Subject: Re: [time-nuts] RE: phase locking Rb to GPS
Hi Richard:
It's my understanding that this optimization can be done by changing the
oscillator power level at the crystal.
In the case of the 32768 Hz watch crystal, it must be run a very low power
and it has a very low aging rate when compared to higher frequency
crystals that are typically run at higher power levels. I think this is
related to the crystal throwing off atoms, so more power means more
acceleration and more atoms thrown off.
Have Fun,
Brooke Clarke, N6GCE
--
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com
Richard H McCorkle wrote:
. . . snip . .
Since both units are the same model, but with different
P/N and both meet the OCXO134-10 spec but have different characteristics I
believe they were each optimized for a different characteristic when
originally ordered, one for low aging, and one for high stability.
--
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com
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