User Manual

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8.3 STATUS1 Settings (FFT)
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8
.3.12 Octave Filter Setting
Screen: STATUS
1
When the octave analysis is selected in
analysis mode, the oct-filter item is shown.
Move the flashing cursor to the oct-filter
item.
The function key display appears, allowing
you to make the selection.
Method
Method
：Filter characteristics approximate
the characteristics used for
conventional octave analyzers with
analog filters.
：Spectrum components outside the
octave band are excluded totally
and only the spectrum in the octave
band is bundled and used for
analysis.
Selection
Selection
1/1-octave (1/3-octave)
normal filter characteristics
1/1-octave (1/3-octave)
sharp filter characteristics
NOTE
When octave analysis has been selected, two different filter types can be
chosen. The characteristics of both filter types are within ANSI CLASS 3
tolerance limits. (1/3-octave only)
This unit does not use analog filters. It first determines the entire power
spectrum and then uses weighting by bundling the spectrum to achieve the
desired filter characteristics.