ScopeMeter
®
Test Tool
Waveform Triggers
43
Waveform Triggers
This section provides an introduction to the trigger functions of the test tool. Triggering tells the
test tool when to begin displaying the waveform. You can use fully automatic triggering, take
control of one or more main trigger functions (semi-automatic triggering), or you can use
dedicated trigger functions to capture special waveforms.
Typical trigger applications:
• Use the Connect-and-View function to have full automatic triggering and instant display of
virtually any waveform.
• If the signal is unstable or has a very low frequency, you can control the trigger level, slope,
and trigger delay for a better view of the signal. (See next section.)
For dedicated applications, use one of the manual trigger functions:
• Edge triggering
• Pulse Width triggering
• External Triggering (models 190-xx2 only)
Trigger Level and Slope
The Connect-and-View™ function enables hands-off triggering to display complex unknown
signals.
When the test tool is in manual range:
1. Press
J to do an auto set.
AUTO appears at the top right of the screen.
Automatic triggering assures a stable display of virtually any signal.
From this point, you can take over the basic trigger controls such as level, slope and delay. To
optimize trigger level and slope manually:
2. Press
T to show the TRIGGER key labels.
3. Press 2 to trigger on either positive slope or negative slope of the chosen waveform.
In Dual Slope Triggering (X) the test tool triggers on both positive slope and negative slope.
4. Press 3 to enable the cursor for manual trigger level adjustment.
5. Use
h i
to adjust the trigger level.
Observe that the trigger icon indicates the trigger position, trigger level, and slope.
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