User Manual

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8.3 STATUS1 Settings (FFT)
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8
.3.5 Setting the Window Processing
Screen: STATUS
1
Press the STATUS key to call up the
STATUS1 screen.
Move the flashing cursor to the window
item, shown in the figure on the left.
Use the function keys to make the selection
.
Method
Method
：Rectangular:
effective on discrete waveforms.
：Hanning:
effective on continuous waveforms.
Selection
Selection
：Exponential:
effective on decaying waveforms.
If EXPO was selected in step , the
coefficient item is displayed. Select the
attenuation ratio in percent, using the
function keys or the
JOG control.
If coefficient (attenuation ratio) is set to 0%
,
processing will be carried out as 0.1%.
100%
100%
10%
10%
N
oise on attenuated waveform is reduced
W
aveform captured in one operation
(
1000 points)
■Exponential window function
Attenuation ratio set to 10%
：Value up, large step
：Value up, small step
：Value down, small step
：Value down, large step
Selection
Selection
NOTE
・The window function defines the segment of the input signal that will be
processed.
・Window processing can be used to minimize leakage error.
When measurements are taken using the Hanning window or exponential
window, note that the calculation results in the display of a value that is
lower than the amplitude obtained when using a rectangular window.