User manual

Section
3: Functions and features Series 2600B System SourceMeter® Instrument
Reference Manual
3-42 2600BS-901-01 Rev. B / May 2013
To disable triggering on the hardware trigger lines, set the mode to bypass. This allows direct control
of the line.
Hardware trigger mode summary
Trigger mode Output Input
Unasserted Asserted Detects
Bypass N/A N/A N/A
Either Edge
High
Low
Either
Falling Edge
High
Low
Falling
Rising Edge
The programmed state of the line determines if the
behavior is similar to RisingA or RisingM:
• High similar to RisingA
• Low similar to RisingM
RisingA High Low Rising
RisingM Low High None
Synchronous High latching Low Falling
SynchronousA
High latching
High
Falling
SynchronousM
High
Low
Rising
Pulsewidth
Specifies the pulse width of the output trigger signal when the hardware line is asserted.
Trigger configuration on hardware lines
The Series 2600B can be configured to send digital signals to trigger external instruments. Linking
these output triggers to the completion of certain source-measure actions enables hardware
handshaking. The programming example below illustrates this.
-- Configure the Series 2600B to detect a rising
-- edge on digital I/O line 2.
digio.trigger[2].mode = digio.TRIG_RISINGA
digio.trigger[2].clear()
-- Configure SMU A to start its source action when a
-- trigger event occurs on digital I/O line 2.
smua.trigger.source.stimulus = digio.trigger[2].EVENT_ID
-- Configure digital I/O line 4 to output a 1 ms
-- rising-edge trigger pulse at the completion of
-- SMU sweep.
digio.trigger[4].mode = digio.TRIG_RISINGM
digio.trigger[4].pulsewidth = 0.001
digio.trigger[4].stimulus = smua.trigger.SWEEP_COMPLETE_EVENT_ID
This example’s triggering setup is shown in the following figure.