User`s guide

104 Chapter 3
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 107). 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, then to stop and wait for a trigger before
advancing to the next segment, which plays to completion. Triggers received during play cause
the current segment to finish, then play advances to the next segment, which plays 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 options:
—
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.
—
Reset & 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 > Tr igg er .
• To display the response selections available for a given trigger mode, press
Trigge r Se tup , then select
the desired trigger mode. To see the selections for Single mode in an ARB format, select Retrigger
Mode
; in real- time Custom, selecting Single mode causes the data pattern to play once when
triggered.
• To display the trigger source options, press
Trigger Setup > Trigger Source.
Active only when
Ext is selected.
PAT TRIG IN 2 pin on
the AUXILARY I/O connector
PATTERN TRIG IN connector