Fluke 199, 196, 192 Finding Missing Pulses, Open the Trigger Options menu Select On Trigger

Triggering on Waveforms	5
Triggering on Pulses

Finding Missing Pulses

The next example covers finding missing pulses in a train of positive pulses. In this example it is assumed that the pulses have a 100 ms distance between the rising edges. If the time accidently increases to 200 ms, a pulse is missing. To set the test tool to trigger on such missing pulses, let it trigger on gaps bigger than about 150 ms. Do the following:

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Select the positive pulse icon to trigger on the gap between the positive pulses, then jump to Condition.

Select >t, then jump to Update.

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Display the TRIGGER key labels.

Open the Trigger Options menu.

6 Select On Trigger.

The test tool is now prepared to trigger on pulse gaps. Observe that the trigger menu at the bottom of the screen has been adapted to set the pulse condition:

3	Select Pulse Width on A... to
	open the Trigger on Pulse
	Width menu.

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