Fluke 91 Series II User Manual page 154

ScopeMeter Test Tool Tutorial
Averaging can be used to remove this random noise from
the waveform. The function will average a number of
acquisitions and smooth out the random noise.
To use Average:
17. Press to disable Min Max envelope.
18. Press .
19. Use to highlight "scope average", and
press to select.
20. Use to achieve an average factor of 32.
You should now have a noise-free trace on the display as
shown in Figure 8-17.
Note that Averaging slows down the waveform response.
Don't forget to deactivate it if not required; otherwise, the
display will appear sluggish.
21. Use to set Average to OFF
Figure 8-17 Averaging a Waveform
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