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
