[time-nuts] Re: What to expect from rubidium lock behavior?

[paul swed]

Totally agree with Bob. Same experience.


On Sat, Dec 11, 2021 at 8:12 AM Bob kb8tq <kb8tq at n1k.org> wrote:

> Hi
>
> Yes, that’s pretty normal operation for any of the telecom Rb’s. They
> also typically drift about 1x10^-9 over the first day of operation. It’s
> best to leave them running all the time. Second best is to turn them
> on a couple days before you need to use them.
>
> Bob
>
> > On Dec 11, 2021, at 2:23 AM, Erik Kaashoek <erik at kaashoek.com> wrote:
> >
> > My rubidium frequency standard (Accubeat AR60A) finally got its nice box
> with good cooling and some LED's showing the status.
> > While watching the unlock LED I noticed the AR60 say's it is locked,
> about 4 or 5 minutes after cold start, when the frequency error jumps below
> about 1e-8
> > It takes 2 or 3 more minutes of slow drift to become stable within
> 1e-10. Is this to be expected?
> > With this locking speed it is tempting to switch off the AR60A unless
> needed for some measurement. Would daily switching on/off have any impact
> on lifetime?
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