[time-nuts] Question on crystal jumps

[SAIDJACK at aol.com]

Hi Steve,
 
the jumps don't anneal themselves, they are permanent changes in  frequency.
 
The crystal is off-frequency after a jump. This has to be compensated by  
driving the crystal with a different voltage after the jump.

See the following plot, blue is phase offset to UTC, brown is EFC  voltage.

You can see that the voltage is different after the jump, meaning the  
crystal has physically changed in some way.
 
bye,
Said
 
 
In a message dated 10/23/2008 19:23:54 Pacific Daylight Time,  
sar10538 at gmail.com writes:

Now if  the jumps were caused by something like a cosmic ray, I would
expect that  the xtal would just wobble off frequency rapidly and very
quickly go back  to its resonant frequency. Using a multi-stage xtal
filter should  circumvent this as the particle would have to physically
strike all the  xtals in the filter on it's path. Physical arrangement
of the xtals in the  filter would easily guard against  that.


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