Fluke 91 Series II User Manual page 165

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The Math Filter function averages the last five and the next
five samples and removes high frequency noise from low
frequency waveforms. Filtering is most useful to clean up
single shot acquisitions.
To see the effect of the Filter function:
1. Press .
2. Press to open the MATH MENU window.
3. Use to highlight MATH OPERATION, and
press to open the list box.
4. Use to highlight "filter", and press
select.
Next choose the INPUT B waveform as the source for the
filter function:
5. Use to highlight SOURCE 1, and press
open the list box.
6. Use to highlight WAVEFORM B, and press
to select.
7. Use to highlight SCALE RESULT, and
press to open the list box.
8. Use to turn scaling OFF, and press
to select.
9. Press to close the window.
You now have a display as shown in Figure 8-24.
to
to
Figure 8-24 Filtering INPUT B
This completes the ScopeMeter Test Tool Tutorial.
At completion, be sure to disconnect the 9-volt battery on
the Demo Board.
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