Model 2657A High Power System SourceMeter® Instrument Reference Manual
Section 7: TSP command reference
2657A-901-01 Rev. B/December 2012
7-325
SweepILogMeasureV()
This KISweep factory script function performs a logarithmic current sweep with voltage measured at every step
(point).
Type
TSP-Link accessible
Affected by
Where saved
Default value
Function No
Usage
SweepILogMeasureV(
smu, starti, stopi, stime, points
)
smu
System SourceMeter
®
instrument channel (set to
smua
)
starti
Sweep start current in amperes
stopi
Sweep stop current in amperes
stime
Settling time in seconds; occurs after stepping the source and before performing a
measurement
points
Number of sweep points (must be
≥
2)
Details
Data for voltage measurements, current source values, and timestamps are stored in
smu
X
.nvbuffer1
.
If all parameters are omitted when this function is called, this function is executed with the parameters set to the
default values.
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 118: SweepILogMeasureV()
starti
= Voltage measurement
stopi
stime
stime
stime
Summary of Contents for 2657A
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