Section 7: TSP command reference
Model 2657A High Power System SourceMeter® Instrument Reference Manual
7-328
2657A-901-01 Rev. B/December 2012
Example
myvlist = {-100, 100, -200, 200, -400,
400, -800, 800, -1600, 1600}
SweepVListMeasureI(smua, myvlist,
500E-3, 10)
This function performs a 10-point voltage list sweep
starting at the first point in
myvlist
. Current is
measured at every step (point) in the sweep. The
source will be allowed to settle on each step for
500 ms before a measurement is performed.
Also see
(on page 5-19)
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 (set to
smua
)
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
Summary of Contents for 2657A
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