[time-nuts] RE: phase locking Rb to GPS
Robert Lutwak
Lutwak at Alum.mit.edu
Sun Oct 23 16:43:34 EDT 2005
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 RLutwak at Symmetricom.com (Business)
(978) 927-4099 FAX Lutwak at Alum.MIT.edu (Personal)
(339) 927-7896 Mobile
----- Original Message -----
From: "Brooke Clarke" <brooke at pacific.net>
To: "Richard H McCorkle" <mccorkle at ptialaska.net>; "Discussion of precise
time and frequency measurement" <time-nuts at febo.com>
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
>
>
> _______________________________________________
> time-nuts mailing list
> time-nuts at febo.com
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
More information about the time-nuts
mailing list