Keysight Technologies 3458A Guide D'utilisation page 374

6 Command Reference
[a] The LEVEL trigger event can be used only for DC voltage and direct-sampled measurements.
[b] The LINE trigger event cannot be used for sampled AC or AC+DC voltage measurements (SETACV RDDM or SYNC)
Power-on event = AUTO.
Default event = SGL.
Remarks
– For all measurements except sub-sampling (see
– Query command: The TRIG? query command returns the specified trigger
– Related commands: LEVEL, LFILTER, NRDGS, SLOPE, SWEEP, T, TARM,
Examples
OUTPUT 722; "TRIG AUTO" !SELECTS AUTO TRIGGER
The following program shows a method to suspend measurements until the
multimeter is properly configured. Line 20 suspends measurements by setting the
trigger event to HOLD. Lines 30 and 40 configure for 30 DC voltage readings per
trigger event. Line 50 generates a single trigger causing the multimeter to make
thirty readings. After the readings are complete, the trigger event reverts to
HOLD.
10 OUTPUT 722;"RESET" !RETURN TO POWER-ON STATE
20 OUTPUT 722;"TRIG HOLD" !SUSPEND READINGS
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or for frequency or period measurements.
operates along with the trigger arm event (TARM command) and the sample
event (NRDGS command). (The trigger event and the sample event are ignored
for sub-sampling.) To make a measurement, the trigger arm event must occur
first, followed by the trigger event, and finally the sample event. The trigger
event does not initiate a measurement. It merely enables a measurement,
making it possible for a measurement to take place. The measurement is
initiated when the sample event (NRDGS or SWEEP command) occurs. Refer
to Triggering Measurements
interaction of the various events for most measurement functions. Refer to
Chapter 5 for information on sub-sampling.
event. Refer to Query commands
information.
TBUFF
Chapter
in Chapter 4 for an in-depth discussion of the
near the front of this chapter for more
5), the trigger event
Keysight 3458A User's Guide