Using an Oscilloscope to Display Frequency Spectrum with Fast Fourier Transform (FFT) Function

The FFT - Fast Fourier Transform function of the oscilloscope can convert time-domain signals into frequency-domain components, providing a frequency spectrum representation.
Users can simultaneously view the time-domain waveform and the signal's spectrum by using the oscilloscope's FFT function.
The faster a waveform transitions between its minimum and maximum values, the more significant harmonics it will have.