Features and Functions 3
Keysight 34420A User’s Guide 93
Triggering
The meter’s triggering system allows you to generate triggers either manually or
automatically, take multiple readings per trigger, and insert a delay before each
reading. Normally, the meter will take one reading each time it receives a trigger,
but you can specify multiple readings (up to 50,000) per trigger.
– You can trigger the meter from the front panel, with an external trigger, or use
autotriggering. Single triggering takes one reading each time you press the
key. External triggering is like single triggering, but the meter waits for
a pulse on the rear-panel Ext Trig (external trigger) terminal before taking a
reading. Autotriggering takes continuous readings at the fastest rate possible
for the present configuration. See also “To Trigger the Meter” on page 59.
– Press to return the meter to auto triggering.
Triggering the meter from the remote interface is a multi-step process that offers
triggering flexibility.
– First, you must configure the meter for the measurement by selecting the
function, range, integration time, etc.
– Then, you must specify the source from which the meter will accept the
trigger. The meter will accept a software (bus) trigger from the remote
interface, a hardware trigger from the Ext Trig terminal, or an immediate
internal trigger.
– Then, you must make sure that the meter is ready to accept a trigger from the
specified trigger source (this is called the wait-for-trigger state).
– Finally, to make the measurement, you must provide an INITiate, READ?, or
MEASure command.
The diagram on the next page shows the meter’s triggering system.
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