Y-axis

FFT spectre graph measurements y-axis

FFT spectre graph measurements y-axis
  1. What is the Y-axis on an FFT graph?
  2. What are Y-axis units of FFT?
  3. How do you read a FFT graph?

What is the Y-axis on an FFT graph?

The FFT display shows frequency based signals as generated from the FFT functions. The x-axis shows the frequency while the y-axis shows the amplitude of the different spectral components.

What are Y-axis units of FFT?

The units for the X-axis is megahertz and the Y-axis is amplitude.

How do you read a FFT graph?

FFTs of complex vibrations have multiple peaks- one for each frequency present in the vibration. Low frequency peaks are shown at the left end of the graph. The left-most peak represents the fundamental. Other peaks indicate overtones.

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