Spectrum

Does FFT magnitude spectrum graph consist of spectral lines or points

Does FFT magnitude spectrum graph consist of spectral lines or points
  1. What does a FFT graph show?
  2. What does the magnitude of an FFT mean?
  3. What is FFT spectrum analysis?

What does a FFT graph show?

Frequency-domain graphs– also called spectrum plots and Fast Fourier transform graphs (FFT graphs for short)- show which frequencies are present in a vibration during a certain period of time.

What does the magnitude of an FFT mean?

Basically, the magnitude of the FFT is the amplitude of the associated frequency component. When you're using the FFT function in MATLAB you probably also want to use the fftshift function to center the results around 0.

What is FFT spectrum analysis?

The FFT spectrum analyzer samples the input signal, computes the magnitude of its sine and cosine components, and displays the spectrum of these measured frequency components. Why Look at a Signal's Spectrum? For one thing, some measurements which are very hard in the time domain are very easy in the frequency domain.

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