Fluke 87 Series IV User Manual page 63

Making Measurements
3
Measuring Pulse Width
The meter measures pulse width in the 50.000 ms range.
To measure pulse width, set up the meter to measure
frequency; then press two more times. As with the
duty cycle function, you can select which level the meter
uses by pressing to trigger on the positive slope or
to trigger on the negative slope. A typical pulse
width display is shown in Figure 3-18.
You can improve pulse width stability by selecting the
averaging feature. Press until "AVG" appears in the
display.
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Figure 3-18. Pulse Width Display
3-27