The spectral display is only capable of displaying 800 to 1000 horizontal pixels; each pixel represents data from multiple FFT bins or frequency channels. The user selects a frequency of interest from the base spectral display, and continually zooms in until the display resolution is one bin per pixel.

Fast Fourier Transform (FFT)
The FFT is an algorithm, or digital calculation routine, that efficiently calculates the discrete Fourier transform from the sampled time waveform. In other words it converts, or "transforms" a signal from the time domain into the frequency domain.

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