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Fluke 190-104, Fluke 190-204
Users Manual
Triggering on Pulses
Use pulse width triggering to isolate and display specific
pulses that you can qualify by time, such as glitches,
missing pulses, bursts or signal dropouts.
Detecting Narrow Pulses
To set the test tool to trigger on narrow positive pulses
shorter than 5 ms, do the following:
1
Apply a video signal to the red input A.
2
Display the
TRIGGER
3
Open the
F4
4
Select Pulse Width on A... to open
the trigger on pulse width menu.
ENTER
62
key labels.
TRIGGER
menu.
TRIGGER OPTIONS
5
Select the positive pulse icon,
then jump to Condition.
ENTER
6
Select <t, then jump to Update.
ENTER
7
Select On Trigger.
ENTER
The test tool is now prepared to trigger on narrow pulses
only. Observe that the trigger key labels at the bottom of
the screen have been adapted to set the pulse conditions:
To set the pulse width to 5 ms, do the following:
8
Enable the arrow keys to adjust
F1
the pulse width.
9
Select 5 ms.
All narrow positive pulses shorter than 5 ms are now
displayed on the screen. (See Figure 28).
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