3 Features and Functions
98 Keysight 34420A User’s Guide
The Wait-for-Trigger State
After you have configured the meter and selected a trigger source, you must place
the meter in the wait-for-trigger state. A trigger will not be accepted until the
meter is in this state. If a trigger signal is present, and if meter is in the
“wait-for-trigger” state, the measurement sequence begins and readings are
taken.
The “wait-for-trigger” state is a term used primarily for remote interface
operation. From the front panel, the meter is always in the “wait-for-trigger” state
and will accept triggers at any time, unless a measurement is already in progress.
You can place the meter in the “wait-for-trigger” state by executing any of the
following commands from the remote interface.
MEASure?
READ?
INITiate
Halting a Measurement in Progress
You can send a device clear at any time to halt a measurement in progress and
place the meter in the “idle state.” The following statement shows how to send a
device clear from a Hewlett-Packard controller if you are using the GPIB interface.
See also page 203.
CLEAR 722 (device clear)
For operation with the RS-232, you must establish a means to send a device clear
(for example, by pressing ^C (Control C)).
A device clear does not affect the configuration of the triggering system. The
trigger source, sample count, trigger delay, and number of triggers are not
changed.
If you have set the meter to infinite sampling (TRIGger:COUNt INFinity), the
device clear is the only way to halt the measurements.
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