[time-nuts] Z3805 initial behaviour after power up
Ulrich Bangert
df6jb at ulrich-bangert.de
Wed Jun 17 08:52:06 UTC 2009
John,
> Any OCXO that has been sitting around for years is likely to
> undergo rapid aging when you first bring it up.
Sure! I had better formulated my question like: A constructor of a GPSDO
knows, that any OCXO that has been sitting around for years is likely to
undergo rapid aging when it is first brouht up. When Symmetricon choosed to
switch to a long time constant early after power up, were they perhaps
expecting a lower OCXO drift than I am observing now?
73s Ulrich DF6JB
> -----Ursprungliche Nachricht-----
> Von: time-nuts-bounces at febo.com
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von John Miles
> Gesendet: Mittwoch, 17. Juni 2009 10:25
> An: Discussion of precise time and frequency measurement
> Betreff: Re: [time-nuts] Z3805 initial behaviour after power up
>
>
>
> > Since I do not have an manual for the Z3805: Can any of you Z3801
> > owners second this behaviour to be normal or would you
> think that it
> > is kind of special for the Z3805 or even a real malfunction (in the
> > sense that the OCXO's drift is above the specs in the beginning)?
>
> Any OCXO that has been sitting around for years is likely to
> undergo rapid aging when you first bring it up. It will be
> so far out of spec that I wouldn't even bother looking at the
> loop behavior until it's been running for a week or two.
> Chances are it'll be fine by then.
>
> -- john, KE5FX
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
More information about the Time-nuts_lists.febo.com
mailing list