Basic FAQ for FFT Analyzer

Trigger refers to the original meaning of "the trigger of a gun or to pull the trigger". In the field of measurement, it is a function that takes the timing of waveform capture in order to make periodic signal waveforms appear (visually) stopped, such as on an oscilloscope.

When no trigger is applied in an FFT analyzer (in trigger-free mode), problems arise each time repeated data is captured: [1] periodic waveforms appear to be stationary and are not visible in the FFT time window, and [2] single signals cannot be captured effectively in the FFT time window. Triggering is used to avoid these issues.

The main uses of the FFT analyzer, as mentioned above, include reliably monitoring time waveforms.

• Synchronous addition in time axis waveforms and Fourier spectra.

• Hammering test for measuring natural frequency

• Field Balancing of Rotating Bodies

is an essential function for uses such as...

	Trigger function (FFT basic terminology)