Agilent Technologies 7000B Series User Manual page 118

4 Triggering
3 Select the trigger source.
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You can select analog channel 1 or 2, Ext, or Line as the trigger source
on any Agilent InfiniiVision oscilloscope. The trigger source can also be
set to channel 3 and 4 on the 4- channel oscilloscopes, or digital
channels D15 through D0 on the mixed- signal oscilloscopes. You can
choose a channel that is turned off (not displayed) as the source for the
edge trigger.
The selected trigger source is indicated in the upper- right corner of the
display next to the slope symbol:
1 through 4 = analog channels
D0 through D15 = digital channels
E = External trigger
L = Line trigger
InfiniiVision 7000B Series Oscilloscopes User's Guide