; Discussion of precise time and frequency measurement
Cc: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Sensitivity to g in atomic clocks
FWIW, I have an FTS militarized Cesium that has an accelerometer as part of the
OCXO assembly to reduce vibration sensitivity
While sensitivity to g is an usually specified parameter for crystal
oscillators, I've been unable to find any indications for atomic clocks, say
5071A, or more modestly LPRO. Can anybody point me to any source of info on the
subject?
Thanks,
Antonio I8IOV
Of iov...@inwind.it
Sent: Tuesday, January 11, 2011 8:49 AM
To: time-nuts@febo.com
Subject: [time-nuts] Sensitivity to g in atomic clocks
While sensitivity to g is an usually specified parameter for crystal
oscillators, I've been unable to find any indications for atomic clocks, say
5071A, or more
While sensitivity to g is an usually specified parameter for crystal
oscillators, I've been unable to find any indications for atomic clocks, say
5071A, or more modestly LPRO. Can anybody point me to any source of info on the
subject?
Thanks,
Antonio I8IOV
Hi Antonio,
You may find some
Bob Camp wrote:
Hi
There are three things people refer to as G sensitivity on a crystal
oscillator:
1) 2 g tip sensitivity (flip it 180 degrees on the bench).
2) Vibration sensitivity (vibration translates into phase noise)
3) Relativistic effects (take the oscillator to the moon and it's
Hi Antonio:
Atomic clocks don't have a sensitivity to the direction of the
acceleration like a crystal. That's to say a crystal has planes and
the direction of the acceleration changes the crystal frequency. See
the plot at:
http://www.prc68.com/I/PRS10.shtml#Accel
The PRS10 was rotated so
FWIW, I have an FTS militarized Cesium that has an accelerometer as part of the
OCXO assembly to reduce vibration sensitivity. I'm told -- but can't document
-- that it was for the Navy and the idea was to counteract the effects of the
ship's guns. FTS engineers had a couple of PTTI articles
