148 Agilent InfiniiVision 3000 X-Series Oscilloscopes User's Guide
10 Triggers
3 Press the Source softkey; then, 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.
4 Adjust the trigger level:
• For analog channels, turn the Trigger Level knob.
• For digital channels, press the [Digital] key and select Thresholds to set
the threshold level.
The value of the trigger level or digital threshold is displayed in the
upper- right corner of the display.
5 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.
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