4 Triggering
140 InfiniiVision Oscilloscopes User’s Guide
Pulse Width Trigger
Pulse Width (glitch) triggering sets the oscilloscope to trigger on a positive or negative
pulse of a specified width. If you want to trigger on a specific timeout value, use Duration
trigger in the Trigger More Menu (see “Duration Trigger” on page 102).
1 Press the [Pulse Width] key in the Trigger section of the front panel to display the
Pulse Width Trigger Menu.
2 Press the Source softkey (or rotate the Entry knob) to select a channel source for the
trigger.
The channel you select is shown in the upper-right corner of the display next to the
polarity symbol.
The source can be any analog or digital channel available on your oscilloscope.
External trigger may also be specified as a source when using a 2-channel
oscilloscope.
Adjust the trigger level for the selected analog channel by turning the Trigger Level
knob. Press the [D15-D0] key and select Thresholds to set the threshold level for
digital channels. The value of the trigger level or digital threshold is displayed in the
upper-right corner of the display.
3 Press the pulse polarity softkey to select positive ( )or negative ( ) polarity for the
pulse width you want to capture.
The selected pulse polarity is displayed in the upper-right corner of the display. A
positive pulse is higher than the current trigger level or threshold and a negative pulse
is lower than the current trigger level or threshold.
Source
Pulse
polarity
Qualifier Qualifier time set
Trigger level
or threshold
Trigger
source
Polarity
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