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8.3 STATUS1 Settings (FFT)
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8.3.12 Octave Filter Setting
Function
display Meaning
:
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
anal
sis.
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).
Procedure
Screen: STATUS1
1. Select "octave analysis" in FFT analysis mode, and the octave filter item is
shown.
2. Move the flashing cursor to the octave filter item.
3. Use the function keys to make a selection.
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.
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