Operations and Features 2
Keysight U3401A User’s and Service Guide 61
Trigger mode
This multimeter has two types of trigger mode.
– Internal — triggers measurements continuously.
– External — triggers a measurement only when a direction is given.
The external trigger is used with a delay settling that has been set by the
multimeter automatically. The amount of trigger delay varies depending on
different function. When external trigger is enabled, the multimeter determines
the range for the primary display based on the input at that time.
Autoranging response time is required before a reading is displayed when you
change the input after a trigger is received.
Procedure
1 Press to enter trigger mode and standby condition. The TRIG
annunciator will be lit and display is indicated with “–––––”.
2 Press to get a new value. After a measurement, the result will be
indicated and held on the display.
3 Press to get a new value again.
4 Press , or to select autoranging or manual range as
necessary.
5 Press to disable external trigger operation mode.
Figure 2-10 Typical trigger mode display
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