Agilent Technologies 34420A, User Manual

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Trigger Source Choices
You must specify the source from which the meter will accept a trigger.
•
The trigger source is stored in volatile memory; the source is set to
autotrigger (front panel) or immediate (remote interface) when power
has been off or after a remote interface reset.
•
Front Panel operation: the meter will accept a either a front panel
single trigger or a hardware trigger from the Ext Trig terminal, or
continuously take readings using autotrigger. At power-on,
autotriggering is used.
•
Remote operation : the meter will accept a software (bus) trigger, a
hardware trigger from the Ext Trig terminal, or an immediate internal
trigger. See "Triggering" on page 80 for more information.
Autotriggering In the autotrigger mode (front panel only), the meter
continuously takes readings at the fastest rate possible for the present
configuration. This is the power-on trigger source for front-panel
operation.
Single Triggering In the single trigger mode (front panel only), you
can manually trigger the meter by pressing
Single
. The meter takes one
reading, or the specified number of readings (sample count), each time
you press the key. The
‘Trig’
annunciator turns on when the meter is
waiting for a trigger.
Pressing the
Single
key also allows the meter to accept triggers on the
Ext Trig terminal.
The front-panel
Single
key is disabled when in remote.
Chapter 3 Features and Functions
Triggering
82