Agilent Technologies E4428C, User Manual, Page: 171 / 700

Chapter 4 147
Basic Digital Operation
Triggering Waveforms
•
Segment Advance
(dual ARB only) causes a segment in a sequence to require a trigger to play. The trigger
source controls how play moves from segment to segment (example on page 150 ). A trigger received
during the last segment loops play to the first segment in the sequence. You have two choices as to how
the segments play:
—
Single
causes a segment in a sequence to play once, after which the dual ARB player stops and waits
for a trigger before advancing to the next segment, and playing that segment to completion. Triggers
received during play cause the current segment to finish, the dual ARB player advances to the next
segment, and plays that segment to completion.
—
Continuous
causes a segment in a sequence to play continuously until the waveform receives another
trigger. Triggers received during play cause the current segment to finish, then play advances to the
next segment, which plays continuously.
•
Continuous
repeats the waveform until you turn the signal off or select another waveform, trigger mode,
or response. Continuous has the following functions:
—
Free Run
immediately triggers and plays the waveform; triggers received during play are ignored.
—
Trigger & Run
plays the waveform when a trigger is received; subsequent triggers are ignored.
—
Re
set & Run
(not available in real-time Custom) plays the waveform when a trigger is received;
subsequent triggers restart the waveform.
Accessing Trigger Utilities
The following figures show the menus for the trigger parameters. These figures show the dual ARB player,
but you can access the trigger utilities through the
Trigger
softkey in all ARB formats, and the
Pattern Trigger
softkey in the Real Time I/Q Baseband (Custom) format.
• To display the trigger modes, press
Mode
>
Dual ARB
>
Trigger
.
Active only when
Ext
is selected.
PAT TRIG IN 2 pin on
the AUXILARY I/O connector
PATTERN TRIG IN connector
Ext Delay Off On
for all
other Arb formats.