Low G Sensitivity

G-sensitivity is a change in frequency resulting from an acceleration force applied to an frequency control device. When an frequency control device is in an application that is exposed to vibration, the frequency of the vibration will modulate the frequency degrading the phase noise.

3D Part View
Here is a comparison of the acceleration sensitivity between a convention crystal and the Fox C3VR. As you can see from the chart above, replacing your conventional crystal with the C3VR instantly gives you a massive improvement in sensitivity to acceleration. The less sensitivity to acceleration the better your phase noise. Better Phase noise means better communication and less data loss.
Conventional Frequency Control devices can show you a nice low phase noise plot, but put that same part under vibration and we get a 30 dBC/Hz difference
Put the C3VR in the same vibration conditions as the Convention DUT and you still get the nice phase noise plot you expect. The Vibration is nearly cancelled.

Typical Acceleration Levels in Various Environments (1)

Buildings, quiescent0.02 rms
Tractor-trailer (3-80 Hz)0.2 peak
Armored personnel carrier0.5 to 3 rms
Ship - calm seas0.02 to 0.1 peak
Ship - rough seas0.8 peak
Railroads0.1 to 1 peak
Propeller aircraft0.3 to 5 rms
Helicopter0.1 to 7 rms
Jet Aircraft0.02 to 2 rms
Missile - boost phase15 peak

(1) John R. Vig, "Quartz Crystal Resonators and Oscillators," US Army Communications-Electronics Research, Development & Engineering Center. January 2004.

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