On 8/5/19 2:21 PM, Poul-Henning Kamp wrote:
--------
In message <[email protected]>, jimlux writes:
One other thing to know about those USOs - they start about 1000 quartz
blanks that are mounted in holders, and wind up with a couple dozen
oscillators in dewars, and then run them all for a long time (many
months) and watch them. 2 or 3 out of a batch will be the ones selected
for use - based on their observed stability -
Do you know where their trash bin is located, and if it is locked ? :-)
I would love to get my hands on a unit from, say, the 10-25 tier of that
process.
I think they do get reused - the aging process is just the oscillator
without all the rest of the electronics. And there's always a need for
engineering models and qual units for environmental testing.
I'll bet that's why they developed the USO with a built in DDS - so that
one that turned out to be 22.12345 MHz can be "reprogrammed" for
10.000000 MHz
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.
