Tektronix Keithley 2601B-PULSE Reference Manual

Section 11: TSP command reference Model 2601B-PULSE System SourceMeter Instrument Reference Manual
11-256 2601B-PULSE-901-01A April 2020
If the subsequent sweep has more points than specified in sweepList, the source will restart at the
beginning. This means that if the trigger count is greater than the number of points in a sweep as
configured, the SMU will satisfy the trigger count by restarting the sweep values from the beginning.
If the subsequent sweep has fewer points than specified in sweepList, the extra values will be
ignored. This means that if the trigger count is less than the number of source values configured, the
SMU will satisfy the trigger count and ignore the remaining source values.
In cases where the first sweep point is a nonzero value, it may be necessary to pre-charge the circuit
so that the sweep will return a stable value for the first measured point without penalizing remaining
points in the sweep.
The SMU will only store the most recent configured source action. The last call to
smua.trigger.source.linearY(), smua.trigger.source.listY(), or
smua.trigger.source.logY() is used for the source action.
Source functions cannot be changed within a sweep.
After configuring the sweep source values, enable the source action by setting
smua.trigger.source.action.
Example
smua.trigger.source.listv({3, 1, 4, 5, 2})
Sweeps through 3 V, 1 V, 4 V, 5 V, and 2 V.
Also see
smua.trigger.source.action (on page 11-253)
smua.trigger.source.linearY() (on page 11-254)
smua.trigger.source.logY() (on page 11-256)
Sweep Operation (on page 4-61)
smua.trigger.source.logY()
This function configures an exponential (geometric) source sweep.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Function
Yes
Usage
smua.trigger.source.logY(startValue, endValue, points, asymptote)
Y
SMU source function (v = voltage, i = current)
startValue
Source value of the first point
endValue
Source value of the last point
points
The number of points used to calculate the step size
asymptote
The asymptotic offset value
Details
This function configures the source action to be a geometric source sweep in a subsequent sweep.
During the sweep, the source generates a geometric series of ascending or descending voltage or
current changes called steps. Each step is larger or smaller than the previous step by a fixed
proportion. The constant of proportionality is determined by the starting value, the ending value, the
asymptote, and the number of steps in the sweep. The number of source steps is one less than the
number of sourced points.

Tektronix Keithley 2601B-PULSE Specifications

General

Brand	Tektronix
Model	Keithley 2601B-PULSE
Category	Measuring Instruments
Language	English