Keithley 2651A Reference Manual page 133

Section 3: Functions and features
List sweeps
Use a list sweep to configure a sweep with arbitrary steps. A measurement is made at each point
after source and measurement settling time.
To configure a list sweep, use the smuX.trigger.source.listY()function. This function
configures the source values the that the source-measure unit (SMU) will output when performing a
list sweep. After configuring the sweep, you must also enable the source action by setting the
smua.trigger.source.action attribute.
Example:
-- Sweep through 3 V, 1 V, 4 V, 5 V, and 2 V.
smua.trigger.source.listv({3, 1, 4, 5, 2})
-- Enable the source action.
smua.trigger.source.action = smua.ENABLE
When the sweep is started, the output level goes to the first point in the sweep. The sweep will
continue through the steps in the order that they were programmed.
The following figure shows a different example of a list sweep with six measurement points. When the
sweep starts, the current or voltage goes to the first point in the sweep. The unit cycles through the
sweep points in the programmed order.
Pulse mode sweeps
A pulse mode sweep can be created for any of the sweep types by configuring the end pulse action.
To configure a pulse mode sweep for source-measure unit (SMU) A, send:
smua.trigger.endpulse.action = smua.SOURCE_IDLE
To configure a DC sweep for SMU A, send:
smua.trigger.endpulse.action = smua.SOURCE_HOLD
3-26
Model 2651A High Power System SourceMeter® Instrument Reference Manual
Figure 39: List sweep example
X
X
Delay
Measure Measure Measure
#1 #2
X = Measurement point
X
X
X
Measure Measure
#3 #4 #5
2651A-901-01 Rev. A / March 2011
X
Measure
#6