Tektronix Keithley 2601B-PULSE Reference Manual

Section 11: TSP command reference Model 2601B-PULSE System SourceMeter Instrument Reference Manual
11-348 2601B-PULSE-901-01A April 2020
Performs a logarithmic voltage sweep with current measured at every step (point):
1. Sets the SMU to output startv amperes, allows the source to settle for stime seconds, and
then makes a current measurement.
2. Sets the SMU to output the next volts step, allows the source to settle for stime seconds, and
then makes a current measurement.
3. Repeats the above sequence until the voltage is measured on the stopv volts step.
The source level at each step (SourceStepLevel) is automatically calculated as follows:
MeasurePoint = The step point number for a measurement
For example, for a five-point sweep (points = 5), a measurement is made at MeasurePoint 1, 2,
3, 4, and 5.
LogStepSize = (log10(stopi) – log10(starti)) / (points – 1)
LogStep = (MeasurePoint – 1) * (LogStepSize)
SourceStepLevel = antilog(LogStep) * startv
Figure 148: SweepVLogMeasureI()
Example
SweepVLogMeasureI(smua, 1, 10, 0.001, 5)
This function performs a five-point logarithmic voltage sweep starting at 1 V and stopping at 10 V. Current is
measured at every step (point) in the sweep after a 1 ms source settling period.
The following table contains log values and corresponding source levels for the five-point logarithmic sweep:
MeasurePoint
LogStepSize
LogStep
SourceStepLevel
1
0.25
0.0
1.0000 V
2
0.25
0.25
1.7783 V
3
0.25
0.5
3.1623 V
4
0.25
0.75
5.6234 V
5
0.25
1.0
10.000 V
Also see
KISweep factory script (on page 9-21)

Tektronix Keithley 2601B-PULSE Specifications

General

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