[time-nuts] Lucent GPSDO comments
Charles Steinmetz
csteinmetz at yandex.com
Fri Nov 14 04:22:58 UTC 2014
Paul wrote:
>Lots of noise on the ti/pps and you can see EFC is rising all the
>time. I will say in the past it had been a steady rise now there is
>a wave that might mean its slowing down a bit. But this all looks
>rattier then I would believe.
According to the plot, the oscillator is still aging (re-tracing)
quite fast. Since it hasn't been powered up for decades, this is not
a huge surprise. So be patient and wait for the crystal to settle
down. (If it still looks like this in three months, then start
considering whether there is a problem.)
One of my best oscillators looked liked that for a month after I
powered it up, then slowly improved. It wasn't as good as an average
10811 for a full six months. Another six months later it was
exceptional, and it has stayed that way for nearly ten years.
Best regards,
Charles
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