Hioki Memory HiCorder MR6000, Instruction Manual, Page: 237 / 392

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Setting FFT Calculation Conditions
Configuring the window function settings
You can choose a window function by which the instrument multiplies an acquired input signal.
Using a window function reduces a leakage error.
See “Window function” (p. 376).
The window functions fall into three major groups.
•Rectangular window •Hann window
•Hamming window
• Blackman window
• Blackman Harris window
•Flat-top window
•Exponential window
Using a non-rectangular window function generally attenuates FFT calculation results.
Compensating this attenuation for effect of the use of a non-rectangular window function can
correct calculation results to an equivalent level of those multiplied by a rectangular window.
> [Calculation] > [FFT calculation]
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1
Tap the [FFT] button to set it to [On] .
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Tap the open mark under [Detail] .
The FFT calculation advanced setting window appears.
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Tap the [Window] box, and then choose a window function from the list.
Rectangular  , Hanning , Hamming , Blackman , Blackman Harris , Flat-top ,
Exponential
See “Window function” (p. 376).
FFT
Calculation Function
HIOKI MR6000A966-03