HP 54620A, User'S And Service Manual

Page: 68 / 243

Pattern Trigger Setup
Advanced Trigger
In
advanced trigger
, you define up to two pattern and edge sources that are
combined with a variety of operators to form the complete trigger
specification.
Advanced trigger is best when the events you want to capture are defined by
a complex series of waveform events in the system, and neither pattern mode
nor edge mode are capable of clearly resolving the necessary sequence. For
example, suppose the events you want to capture are defined by the nth
occurrence of an edge, by a pattern with a certain minimum duration, or by a
pattern followed by another pattern. Advanced trigger gives you this and
more.
Figure 14 shows an advanced trigger setup, with the overview display turned
on. The display shows a pattern duration trigger.
Choose the
channel for
which you will
set the level or
edge required Set the
required
level to high
or low Set one channel
to require a
rising or falling
edge (or either
by pressing both
keys
simultaneously)
to satisfy the
pattern Clear a level
or edge
requirement
for a
particular
channel
Figure 13
Making Analyzer Measurements
Trigger types
67