206 Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide
11 Triggers
When two non-overlapping zones are used, their conditions are ANDed to become
the final qualifying condition.
When two overlapping zones have the must intersect condition, the zones are
ORed. When two overlapping zones have different conditions, Zone 1 takes
precedence and Zone 2 is not used. In this case, Zone 2 will have no fill (that is,
neither solid nor shaded) to indicate that it is not being used.
The zone qualified trigger feature is incompatible with, and will disable, the XY and
Roll horizontal time modes and the Averaging acquisition mode.
Keep in mind that the TRIG OUT signal comes from the oscilloscope's hardware trigger. The
TRIG OUT signal indicates when there is a trigger (acquisition) that is evaluated for zone
intersection, not when an acquisition meets the zone qualification and is plotted on the
oscilloscope's display.