Anderson Electronics, Inc. - Tutorial (Perturbations

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Perturbations - Dips

The effect of temperature dependent mode coupling is called perturbations, band-breaks or activity dips. The coupling is usually that of the, face shear, extensional and flexural modes in the resonator. When the modes couple at mutually dependent frequencies, the resonator driving energy is distributed over both modes resulting in increased resistance and a frequency change at the temperature in question. The increased resistance can cause the oscillator to stop oscillation and/or the change of frequency may cause loss of lock and data.

Activity Dips

Frequency Jumps

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