Series 2600B System SourceMeter® Instrument Reference Manual
Section 7: TSP command reference
2600BS-901-01 Rev. C / August 2016
7-363
SweepVLogMeasureI()
This KISweep factory script function performs a logarithmic voltage sweep with current measured at every step
(point).
Type
TSP-Link accessible
Affected by
Where saved
Default value
Function
No
Usage
SweepVLogMeasureI(
smu, startv, stopv, stime, points
)
smu
System SourceMeter
®
instrument channel (for example,
smua
refers to SMU
channel A)
startv
Sweep start voltage in volts
stopv
Sweep stop voltage in volts
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 current measurements, voltage 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 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
performs a current measurement.
2. Sets the
smu
to output the next volts step, allows the source to settle for
stime
seconds, and then
performs 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 performed at
MeasurePoint
1, 2, 3, 4, and 5.
LogStepSize = (log10(stopi) – log10(starti)) / (points – 1)
LogStep = (MeasurePoint – 1) * (LogStepSize)
SourceStepLevel = antilog(LogStep) * startv