[time-nuts] ADEV test setup [was GPSDO TC & Damping]

John Miles jmiles at pop.net
Fri Jan 9 16:32:32 EST 2009


I'd like to see a similar test conducted against a local Cs clock (and/or
maser), just to get everything on one graph.

-- john, KE5FX

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of Bruce Griffiths
> Sent: Friday, January 09, 2009 1:26 PM
> To: Tom Van Baak; Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] ADEV test setup [was GPSDO TC & Damping]
>
>
> Tom Van Baak wrote:
> >> 4) The real stumbling block is obtaining a suitable reference.
> >> An FTS1200 or an OSA8607 may be suitable, however these are either rare
> >> or expensive.
> >> Some rubidium standards are also suitable.
> >>
> >
> > Bruce,
> >
> > Note that my Tbolt time constant plots were made using just a
> > 58503B GPSDO as the reference; not something more exotic.
> >
> > /tvb
> >
> >
> Tom
>
> Doesnt that introduce some correlations for larger tau as both the
> Thunderbolt and the 58503B are both locked to GPS?
>
> Bruce
>
>





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