Technical data

589
Keysight 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.
• Pattern triggering— identifies a trigger condition by looking for a specified
pattern. This pattern is a logical AND combination of the channels. You can also
trigger on a specified time duration of a pattern.