Select the file to be analysed. If this is a file in a series then the rest of the series is automatically added to the list. SDR-RADIO.com and SpectraVue recordings are supported.
The FFT size determines the resolution bandwidth - a larger FFT size results in a finer resolution bandwidth and fewer (but higher resolution) display rows.
As you change the FFT value the Display Rows value shown at the bottom of the display changes.
The windowing function is selected to reduce spectral leakage, the default option is usually sufficient.
The data used to generate the display.