Technical data

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Agilent InfiniiVision 2000 X-Series Oscilloscopes
Programmer's Guide
29
:TRIGger Commands
Control the trigger modes and parameters for each trigger type. See:
• "Introduction to :TRIGger Commands" on page 589
• "General :TRIGger Commands" on page 591
• ":TRIGger[:EDGE] Commands" on page 601
• ":TRIGger:GLITch Commands" on page 607 (Pulse Width trigger)
• ":TRIGger:PATTern Commands" on page 616
• ":TRIGger:TV Commands" on page 621
Introduction to
:TRIGger
Commands
The commands in the TRIGger subsystem define the conditions for an
internal trigger. Many of these commands are valid in multiple trigger
modes.
The default trigger mode is :EDGE.
The trigger subsystem controls the trigger sweep mode and the trigger
specification. The trigger sweep (see ":TRIGger:SWEep" on page 600) can
be AUTO or NORMal.
• NORMal mode — displays a waveform only if a trigger signal is present
and the trigger conditions are met. Otherwise the oscilloscope does not
trigger and the display is not updated. This mode is useful for
low- repetitive- rate signals.
• AUTO trigger mode — generates an artificial trigger event if the trigger
specification is not satisfied within a preset time, acquires
unsynchronized data and displays it.
AUTO mode is useful for signals other than low-repetitive- rate signals.
You must use this mode to display a DC signal because there are no
edges on which to trigger.
The following trigger types are available (see ":TRIGger:MODE" on
page 598).
•Edge triggering— identifies a trigger by looking for a specified slope
and voltage level on a waveform.
•Pulse width triggering— (:TRIGger:GLITch commands) sets the
oscilloscope to trigger on a positive pulse or on a negative pulse of a
specified width.