:FUNCtion[:FFT]:WINDow
:FUNCtion[:FFT]:WINDow <window>
:FUNCtion[:FFT]:WINDow?
<window>
string
RECTangular HANNing FLATtop BHARris
Selects the windowing transform or operation for the FFT (Fast Fourier Transform) function
The :FUNCtion[:FFT]:WINDow command allows the selection of four different windowing transforms or operations for the FFT (Fast Fourier Transform) function. The FFT operation assumes that the time record repeats. Unless an integral number of sampled waveform cycles exist in the record, a discontinuity is created between the end of one record and the beginning of the next. This discontinuity introduces additional frequency components about the peaks into the spectrum. This is referred to as leakage. To minimize leakage, windows that approach zero smoothly at the start and end of the record are employed as filters to the FFTs. Each window is useful for certain classes of input signals.
<window><NL>
Select the Hanning window for the FFT function
:FUNCtion[:FFT]:WINDow HANN