User Manual

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8.7 Analysis Function
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S
tored waveform
Y
-axis: LIN-MAG (X-axis: LOG-Hz
)
Y
-axis: LOG-MAG (X-axis: LOG-Hz
)
(Overall value
)
NOTE
Window compensation value: γ
Square wave: γ =1
8
Hanning: γ =
3
2 log(α/100
)
Exponential: γ=
(α/100)
2
ｰ 1
Example Power spectra waveforms
Overall value
The overall value is obtained by taking the square root of the total of power
spectra for all frequencies.
PSPo DC component
PSPi ith AC component
Compensation is applied to data for 1000 points captured before starting FFT
processing, to achieve the same overall value, also when a window function
other than rectangular window is used.
(α is a percentage with a range of 0 ≦α＜100.)
If α is set to 0 with the exponential window function, processing will be
carried with α = 0.1.