Agilent Technologies 34420A, User Manual

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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 HP-IB interface.
See also page 187.
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.
3
Chapter 3 Features and Functions
Triggering
85
GPIB