[time-nuts] LPRO testing

Magnus Danielson magnus at rubidium.dyndns.org
Mon Jan 21 00:06:33 UTC 2013


Hi John,

On 01/20/2013 10:36 PM, John Miles wrote:
> If you have a TimePod or 3120A you may be able to capture an LPro warmup
> cycle by selecting 500 Hz measurement bandwidth.  You will still get drift
> warnings during the lock-search process but the data will probably be OK as
> long as the swing isn't too radical.
>
> In this case, the LPro swept about +/- 150 Hz around 10 MHz before locking
> up at about 120 seconds:
>
> Zooming into the frequency-difference plot reveals that it continued to
> settle down for the next few minutes:

Quite useful :)

> You could get the same data from a counter, of course, just not at 1000
> sample points per second. :)

Naturally! :)

> (20+ MB  .TIM file at http://www.miles.io/lpro_coldstart.zip for those
> interested)

Handy. Thanks :)

The main reason I have been asking have been to establish measurements 
to be done in order to figure out the failure mode(s).

Cheers,
Magnus



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