[time-nuts] LPRO-101 with Brooks Shera's GPS locking circuit
Ulrich Bangert
df6jb at ulrich-bangert.de
Sat Dec 16 15:34:02 EST 2006
Hal,
> Do I have to get a cesium clock so I have a better reference?
In the last consequence: I fear, yes! A disciplined H2 Maser might even
be the better choice.
> But then how do I tell how good my cesium clock really is?
The manual tells you. If you don't believe the manual ask TVB as a
second source.
Best regards
Ulrich Bangert, DF6JB
> -----Ursprüngliche Nachricht-----
> Von: time-nuts-bounces at febo.com
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Hal Murray
> Gesendet: Samstag, 16. Dezember 2006 21:23
> An: Discussion of precise time and frequency measurement
> Betreff: Re: [time-nuts] LPRO-101 with Brooks Shera's GPS
> locking circuit
>
>
>
> > You still want to produce some form of quality measure for the ADEV
> > shape in order to form some form of control loop.
>
> Suppose I build I good GPSDO. How do I determine how good it
> is? (or even
> if it is any good)
>
> How much do I learn by just plotting the control voltage?
> How much do I learn by comparing it with a good
> non-disciplined crystal?
>
>
> Do I have to get a cesium clock so I have a better reference?
> But then how
> do I tell how good my cesium clock really is?
>
>
>
> --
> These are my opinions, not necessarily my employer's. I hate spam.
>
>
>
>
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