[time-nuts] Vibration isolation of quartz oscillators

[Poul-Henning Kamp]

--------
Michael Wouters writes:

> In their former life they were part of the frequency synthesis chains
> for H-masers and they hung vertically from a rubber suspension that was
> presumably intended to provide vibration isolation. Unfortunately, the
> person responsible for this has long since retired so is no longer
> around to ask questions of.

Make sure that you orient the OCXO so it is least sensitive to acceleration
along the vertical axis.

You find this by flipping the OCXO upside/down in various orientations
while measuring the frequency shift.

Notice that in general the minimum sensitivity is not guaranteed to
correspond to any of X/Y/Z.

Check if Oscilloquartz have documented the optimal orientation.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.