[time-nuts] Lucent GPSDO comments

Charles Steinmetz csteinmetz at yandex.com
Thu Nov 13 23:22:58 EST 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,


More information about the time-nuts mailing list