What is Nyquist Frequency?

The Nyquist frequency is half the sampling rate of a data acquisition system. It represents the upper limit of frequencies that can be accurately captured without aliasing. To correctly sample a signal of a given frequency without distortion the sampling rate must exceed twice that frequency.

How Nyquist Frequency Works in Sift

Sift allows engineers to verify that sampling rates are sufficient for the signals being captured in high-vibration structural or propulsion testing where undersampling produces aliased data.