Keithley 2651A Reference Manual page 140

Model 2651A High Power System SourceMeter® Instrument Reference Manual
You can obtain very precise timing and synchronization between channels of multiple instruments
using the trigger model to control the actions of the source-measure unit (SMU). To achieve such
precise timing, use a static trigger configuration. When a static trigger configuration is not possible,
you can use the interactive triggering method to control the timing and actions of the SMU.
Both programming methods use trigger objects. Trigger objects generate and monitor trigger events.
External triggers are possible using digital I/O, TSP-Link
interface, and the manual trigger (the TRIG key).
The following figure graphically represents all the trigger objects of the Model 2651A instrument.
Model 2651A
Trigger events are identified by means of an event ID. The following table describes the trigger event
IDs.
Trigger event IDs*
Event ID
smuX.trigger.SWEEPING_EVENT_ID
smuX.trigger.ARMED_EVENT_ID
smuX.trigger.SOURCE_COMPLETE_EVENT_ID
smuX.trigger.MEASURE_COMPLETE_EVENT_ID
2651A-901-01 Rev. A / March 2011
Figure 42: Triggering overview
TIMER
(8)
SMU A
EVENT
BLENDER
(4)
TSP-LINK
DIGITAL
SYNC.
I/O
LINES
(14 lines)
(3 lines)
Hardware triggers Communication triggers
®
synchronization lines, LAN, command
Manual trigger
MANUAL
(front panel
TRIG key)
LAN COMMAND
(8 triggers) INTERFACE
Event description
Occurs when the SMU transitions from the idle state
to the arm layer of the trigger model
Occurs when the SMU moves from the arm layer to
the trigger layer of the trigger model
Occurs when the SMU completes a source action
Occurs when the SMU completes a measure action
Section 3: Functions and features
Legend:
= Trigger object
= Trigger events
= External output trigger
= Stimulus input
= External input trigger
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