Sweepilogmeasurev() - Keithley 2601B Reference Manual

Series 2600B System SourceMeter® Instrument Reference Manual

SweepILogMeasureV()

This KISweep factory script function performs a logarithmic current sweep with voltage measured at every step
(point).
Type TSP-Link accessible
Function No
Usage
SweepILogMeasureV(smu, starti, stopi, stime, points)
smu
starti
stopi
stime
points
Details
Data for voltage measurements, current source values, and timestamps are stored in smuX.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
2600BS-901-01 Rev. B / May 2013
Affected by
®
System SourceMeter instrument channel (for example, smua refers to SMU
channel A)
Sweep start current in amperes
Sweep stop current in amperes
Settling time in seconds; occurs after stepping the source and before performing a
measurement
Number of sweep points (must be ≥2)
Figure 137: SweepILogMeasureV()
Section 7: TSP command reference
Where saved Default value
7-331