Y-axis

FFT Plot Axis Confirmation

FFT Plot Axis Confirmation
  1. What is the Y-axis of FFT plot?
  2. What is the Y-axis on FFT Matlab?
  3. How do you normalize FFT amplitude?
  4. What are the units of the y-axis FFT?

What is the Y-axis of FFT plot?

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 is the Y-axis on FFT Matlab?

Accepted Answer

If you measured your data in Volts, the y-axis of the fft output in your code will be in Volts.

How do you normalize FFT amplitude?

Normalise the fft by dividing it by the length of the original signal in the time domain. Zero values within the signal are considered to be part of the signal, so 'non-zero samples' is inappropriate. The length to use to normalise the signal is the length before adding zero-padding.

What are the units of the y-axis FFT?

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

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