Fluke 91 Series II User Manual page 129

Measuring Examples
➆
Set the left cursor to the low level of the waveform:
see Figure 7-14. This is the 0% reference point.
➇
Set the right cursor to the high level of the waveform:
see Figure 7-14. This is the 100% reference point.
➈
The test tool instantly displays the rise time: "156 ns".
(See Figure 7-14.)
To identify the points on the slope where the measurement
has occurred, you can use the markers on page 3 within
the More Scope window.
Figure 7-14 Rise Time Measurement (with markers)
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