Keysight E4990A - Page 277

Programming
267
• :ABOR
• *RST
When the trigger system is in "Hold" state and one of the channels
switches to "Initiate" state (arrow "f" in Trigger system), the trigger
system switches to "Waiting for Trigger" state (arrow "a" in Trigger
system).
"Waiting for Trigger" State
When the trigger system is in "Waiting for Trigger" state and either the
instrument is triggered (i.e., a trigger is detected) or one of the following
commands is executed, the trigger system switches to "Measurement"
state (arrow "b" in Trigger system)
• :TRIG
• :TRIG:SING
• *TRG
As shown in the table below, the instrument is triggered differently
depending on which trigger source is specified. To specify the trigger
source, use the :TRIG:SOUR command.
Trigger
Source
How instrument is triggered
Internal
trigger
The instrument is automatically triggered within itself
External
trigger
The instrument is triggered when a trigger signal is input
through the Ext Trig terminal or the handler interface
Bus trigger
The instrument is triggered when the trigger command is
issued.
Manual
trigger
The instrument is triggered when you press Trigger >
Trigger on the front panel.
"Measurement" State
In "Measurement" state, the instrument waits for the elapse of the sweep
delay time (set by the :SENS<ch>:SWE:DEL) and then starts a
measurement cycle. This process is performed sequentially on each of
those channels that are in "Initiate" state immediately before the transition
to this state, in ascending order of channel number.