Smart Average; Persistence, Envelope And Dot-Join To View Waveforms - Fluke ScopeMeter 190 Series III User Manual

190 Series III
Users Manual

Smart Average

In the normal average mode occasional deviations in a waveform just distort the averaged wave
shape, and do not show up on screen clearly. When a signal really changes, for instance when
you probe around, it takes quite some time before the new wave shape is stable. With smart
averaging you can quickly probe around, and incidental waveform changes like a line flyback in
video show up on screen instantly.

Persistence, Envelope and Dot-Join to View Waveforms

You can use Persistence to observe dynamic signals. See
P
1. Press
2. Open the WAVEFORM OPTIONS menu with 4.
3. Use the cursor and E to highlight to Waveform: and open the Persistence... menu.
4. Use the cursor and E to select:
a. Digital Persistence: Short, Medium, Long or Infinite to observe dynamic waveforms like on
an analog oscilloscope.
b. Digital Persistence: Off, Display: Envelope to see the upper and lower boundaries of
dynamic waveforms (envelope mode).
c. Display Dot-join: Off to show measured samples only. Dot join off may be useful when
measuring for example modulated signals or video signals.
d. Display: Normal to turn the envelope mode off and the dot-join function on.
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Figure 7. Smoothing a Waveform
to show the SCOPE key labels.
Fluke-Direct
Figure 8.
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