Trigger Source Choices - HP 34401A User Manual

Chapter 3 Features and Functions
Triggering

Trigger Source Choices

You must specify the source from which the multimeter will accept a
trigger. From the front panel, the multimeter will accept a single
trigger, a hardware trigger from the Ext Trig terminal, or continuously
take readings using auto trigger. At power-on, auto triggering is used.
From the remote interface, the multimeter will accept a software (bus)
trigger, a hardware trigger from the Ext Trig terminal, or an immediate
internal trigger. The * (sample) annunciator turns on during each
measurement.
The trigger source is stored in volatile memory; the source is set to
auto trigger (front panel) or immediate (remote interface) when
power has been off or after a remote interface reset.
To select the trigger source from the remote interface, use the
following command. The CONFigure and MEASure? commands
automatically set the trigger source to IMMediate.
TRIGger:SOURce {BUS|IMMediate|EXTernal}
Auto Triggering In the auto trigger mode (front panel only), the
multimeter 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 multimeter by pressing
The multimeter takes one reading, or the specified number of
readings (sample count), each time you press the key. The Trig
annunciator turns on when the multimeter is waiting for a trigger.
The front-panel
Single
key is disabled when in remote.
3
.
Single
73