Hanning FFT window
FFT windows have various resolution bandwidths and scallop losses (see the figure below). Choose the one that best allows you to view
the signal characteristics you are interested in.
The Hanning window has the narrowest resolution bandwidth, but higher side lobes. Hanning has slightly poorer frequency resolution than
Hamming. Hanning is best for measuring sine, periodic, and narrow-band random noise, and transients or bursts where the signal levels
before and after the event are significantly dif
ferent.
Hanning window
Hamming window
This window is unique in that the time domain shape does not taper all the way to zero at the ends. This makes it a good choice if you
wanted to process the real and imaginary parts of the spectrum of
f line and inverse transform it back to the time domain. Because the data
does not taper to zero, you can remove the effect of the window function from the result.
Measurement concepts
2 Series MSO MSO24 and MSO22 253
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