Fluke 199C/S FE 192,196,199 C Users Manual - Page 71

Finding Missing Pulses, Trigger Options, Trigger on Pulse Width, Condition, >t, Update, On Trigger

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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: 1 Display the TRIGGER key labels. 2 Open the Trigger Options menu. 5 Triggering on Waveforms Triggering on Pulses 4 Select the positive pulse icon to trigger on the gap between the positive pulses, then jump to Condition. 5 Select >t, then jump to Update. 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. 63

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Triggering on Waveforms
Triggering on Pulses
5
63
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:
1
Display the
TRIGGER
key labels.
2
Open the
Trigger Options
menu.
3
Select
Pulse Width on A...
to
open the
Trigger on Pulse Width
menu.
4
Select the positive pulse icon to
trigger on the gap between the
positive pulses, then jump to
Condition
.
5
Select
>t
, then jump to
Update
.
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: