The frequency resolution of each spectral line is equal to the Sampling Rate divided by the FFT size . For instance, if the FFT size is 1024 and the Sampling Rate is 8192, the resolution of each spectral line will be: 8192 / 1024 = 8 Hz.
The frequency resolution of each spectral line is equal to the Sampling Rate divided by the FFT size . For instance, if the FFT size is 1024 and the Sampling Rate is 8192, the resolution of each spectral line will be: 8192 / 1024 = 8 Hz.