878 Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide
31 :TRIGger Commands
The following trigger types are available (see ":TRIGger:MODE" on
page 886).
•Edge triggering— identifies a trigger by looking for a specified slope
and voltage level on a waveform.
• Nth Edge Burst triggering— lets you trigger on the Nth edge of a burst
that occurs after an idle time.
•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.
•TV triggering— is used to capture the complicated waveforms of
television equipment. The trigger circuitry detects the vertical and
horizontal interval of the waveform and produces triggers based on the
TV trigger settings you selected. TV triggering requires greater than º
division of sync amplitude with any analog channel as the trigger
source.
• USB (Universal Serial Bus) triggering— will trigger on a Start of
Packet (SOP), End of Packet (EOP), Reset Complete, Enter Suspend, or
Exit Suspend signal on the differential USB data lines. USB Low Speed
and Full Speed are supported by this trigger.
Reporting the Setup
Use :TRIGger? to query setup information for the TRIGger subsystem.
Return Format
The return format for the TRIGger? query varies depending on the current
mode. The following is a sample response from the :TRIGger? query. In
this case, the query was issued following a *RST command.
:TRIG:MODE EDGE;SWE AUTO;NREJ 0;HFR 0;HOLD +60.0000000000000E-09;
:TRIG:EDGE:SOUR CHAN1;LEV +0.00000E+00;SLOP POS;REJ OFF;COUP DC
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