Understand Oscillator G‑Sensitivity in 2 Minutes

This video demonstrates how to perform a G-sensitivity test on an oscillator, which evaluates how an oscillator’s output frequency shifts when subjected to acceleration or vibration. G-sensitivity refers to the change in a crystal oscillator’s output frequency caused by applied acceleration, also known as acceleration sensitivity. This effect occurs because the crystal and its supporting circuit behave as electro-mechanical components; any external acceleration can induce frequency changes in the oscillator’s output. The magnitude of this effect is typically expressed in ppb per g (parts per billion per g), indicating how much the oscillator’s frequency varies per unit acceleration. Understanding G-sensitivity is critical in high-reliability systems such as aerospace, navigation, and precision timing applications where vibration and motion are present.

▋Understand the concept of G-sensitivity

Learn what G-sensitivity is and why it matters for oscillator performance under acceleration and vibration.

▋Learn how to conduct the measurement

Gain insight into how acceleration or vibration is applied and how the resulting frequency change is measured on an oscillator.

▋Evaluate oscillator performance under real conditions

Interpret test results to assess whether an oscillator will maintain frequency stability in environments where vibration or motion occurs.

▋Introduction to G-Sensitivity

G-sensitivity describes how much an oscillator’s output frequency changes when acceleration is applied. It is an important metric in determining how vibration affects frequency stability.

▋Demonstration of Testing Procedure

The video illustrates how to apply acceleration (in different directions) and measure the corresponding frequency change as part of the G-sensitivity evaluation.

▋Interpreting Test Results

Understanding the measured frequency shifts helps engineers estimate the oscillator’s performance under vibration, providing data for system design and reliability assessment.

▋Summary

G-sensitivity testing is a practical step in evaluating and verifying oscillator performance under dynamic conditions where movement or vibration might affect stability.