FLUKE MDA-550/FPC User Manual for the Fluke MDA-550/FPC Motor Drive Analyzer with one-year Premium Care, 500 MHz, 4-channel

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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.

Figure 7. Smoothing a Waveform

Persistence, Envelope and Dot-Join to View Waveforms

You can use Persistence to observe dynamic signals. See Figure 8.

1. Press

P to show the SCOPE key labels.

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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FLUKE MDA-550/FPC Motor Drive Analyzer with one-year Premium Care, 500 MHz, 4-channel