User Manual

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9.11 Setting the 8938 FFT ANALOG UNIT
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Screen: CHANNEL1, DISPLAY
Call up the CHANNEL1 or
DISPLAYscreen.
Use the CH.SET key to display the desired
channel screen.
Move the flashing cursor to the position
shown in the figure on the left.
Use the function keys to make the
selection.
Method
Method
：Anti-aliasing filter is disabled.
：Anti-aliasing filter is enabled.
Selection
Selection
Setting the Anti-aliasing Filter
Flashing curso
r
NOTE
9
.11 Setting the 8938 FFT ANALOG UNIT
The 8938 FFT ANALOG UNIT contains an internal anti-aliasing filter
required for FFT analysis. Enable the anti-aliasing filter when doing FFT
analysis.
Refer to Section 9.3 for the common settings.
・We recommend using an input unit equipped with an anti-aliasing filter
that can be enabled to minimize sampling distortions during FFT analysis.
・Refer to Section 21.3.10 for more information about aliasing distortion and
anti-aliasing filters.
・If the anti-aliasing filter is on, "A" is printed at the end of the filter settings
page during list printing. Refer to Section 13.5.
・Refer to Section 8.3.3 for details about the relationship between the anti-
aliasing filter cutoff frequency and the frequency range and time axis range.