Keithley 2600B User Manual

Section
7: TSP command reference Series 2600B System SourceMeter® Instrument
Reference Manual
7-360 2600BS-901-01 Rev. C / August 2016
Performs a logarithmic current sweep with voltage measured at every step (point):
1. Sets the smu to output starti amperes value, allows the source to settle for stime seconds, and then
performs a voltage measurement.
2. Sets the smu to output the next amperes step, allows the source to settle for stime seconds, and then
performs a voltage measurement.
3. Repeats the above sequence until the voltage is measured on the stopi amperes 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 performed at MeasurePoint 1,
2, 3, 4, and 5.
LogStepSize = (log10(stopi) – log10(starti)) / (points – 1)
LogStep = (MeasurePoint – 1) * (LogStepSize)
SourceStepLevel = antilog(LogStep) * starti
Figure 135: SweepILogMeasureV()
Example
SweepILogMeasureV(smua, 0.01, 0.1,
0.001, 5)
This function performs a five-point linear current sweep
starting at 10 mA and stopping at 100 mA. Voltage is
measured at every step (point) in the sweep. The source is
allowed to settle on each step for 1 ms before a
measurement is performed.
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
0.01 A
2
0.25
0.25
0.017783 A
3
0.25
0.5
0.031623 A
4
0.25
0.75
0.056234 A
5 0.25 1.0 0.1 A
Also see
KISweep factory script (on page 5-21)

Keithley 2600B Specifications

General

Brand	Keithley
Model	2600B
Category	Measuring Instruments
Language	English