[time-nuts] Strange oscillations

[Brooke Clarke]

Hi Bill:

I did the gravity experiment on my PRS10 by monitoring the tuning 
voltage to the crystal (which is controlled by a loop driven from a 
Motorola GPS receiver.  The max change due to gravity acting in the 6 
different directions is about 750E-12.
http://www.pacificsites.com/~brooke/PRS10.shtml

Have Fun,

Brooke Clarke, N6GCE

-- 
http://www.PRC68.com
http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com




Bill Hawkins wrote:

>So it looks like Alberto has a hysterical crystal in a nice,
>small package. The crystal easily meets the 10E-10 specification.
>
>Too bad, I was going to suggest gravity waves and ask if the
>magnitude of the oscillation changed with orientation of the
>unit's case. But I'm not an astrophysicist so I don't know
>the expected magnitude of the effect.
>
>The specs on the reference voltage are not that tight. Would
>the voltage reference junction have a tighter tempco than the
>crystal? One would think so.
>
>Anybody know the stability of the VP Oncore GPS?
>
>Does a phase-locked loop have hysteresis from some digital
>effect? Again, that seems unlikely.
>
>Alberto, what's your weather been like? Clear, windy, cloudy?
>
>Regards,
>Bill Hawkins
>
>
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