Trigger Model Components - Keithley 3700 series Reference Manual

Series 3700 System Switch/Multimeter Reference Manual

Trigger model components

The individual components of the trigger model are explained in the following paragraphs.
Idle
When a scan is initiated, operation leaves the idle state and immediately drops down to the
control source. Note that after the last channel in the scan is measured, operation returns to the
idle state, where measurements are halted and the last channel in the list is closed.
Triggers
The following four action triggers are associated with the trigger model operation:




STEP operation: When the trigger event is detected, a channel is closed and a measurement
may be taken, if configured for one. The scan pointer then loops back to the control source and
waits for the next trigger event to occur.
SCAN operation: When the trigger event is detected, all the channels in the scan list are
scanned. The scan pointer then returns to the control source and waits for the next trigger event
to be detected.
NOTE
Control source
Arm Action Trigger
Channel Action Trigger
(this trigger may be
bypassed)
Sequence Action Trigger
Measure Action Trigger
Document Number: 3700S-901-01 Rev. A / August 2007
Arm Action Trigger
Channel Action Trigger (this trigger may be bypassed)
Sequence Action Trigger
Measure Action Trigger
To clear a set trigger stimulus, set the stimulus value equal to 0.
Description
This trigger is associated with the ICL scan.trigger.arm.stimulus (on
page 9-168) and affects the "Wait Scan Start Trigger" block of the
trigger model.
This trigger is associated with the ICL scan.trigger.channel.stimulus
(on page 9-170) and affects the "Wait Channel Start Trigger" block of
the trigger model.
This trigger is associated with the ICL scan.trigger.sequence.stimulus
(on page 9-173) and affects the "Wait Sequence Trigger" block of the
trigger model.
This trigger is associated with the ICL scan.trigger.measure.stimulus
(on page 9-171) and affects the "Wait Measure Trigger" block of the
trigger model.
Section 7: Scanning
7-5