[time-nuts] Re: Do crystals still jump?

[dschuecker]

Hi,

yes, they do jump.

Some years ago our DSL-modems fell out of sync when they were exposed to 
a temperature jump., ie. in the warm exhaust of a vac cleaner. Sure, all 
xtals have a temperature dependency, but with this batch of crystals 
there was a frequency change of 50ppm or so for a temp change of 
2Kelvin. These are perceived numbers, I do not have exact data. The 
modems' PLL could not track the frequency change fast enough and the 
modem fell outta sync. . We had a lot of these crystals in the field and 
that was a pretty severe problem.

Cheers

Detlef

Am 02.09.2022 um 16:25 schrieb iovane--- via time-nuts:
> Some time ago there have been some discussions here on crystal jumps. Do crystals still jump? If anybody out there has data (only date and time) of old crystal jumps (first decade of this century) I would be pleased to receive some, thanks.
>
> I8IOV Antonio
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