Sweepvlogmeasurei() - Keithley 2601B Reference Manual

Section 7: TSP command reference
Example
myvlist = {-0.1, 0.1, -1, 1, -6, 6, -40,
40, 0, 0}
SweepVListMeasureI(smua, myvlist,
500E-3, 10)
Also see
KISweep factory script

SweepVLogMeasureI()

This KISweep factory script function performs a logarithmic voltage sweep with current measured at every step
(point).
Type TSP-Link accessible
Function No
Usage
SweepVLogMeasureI(smu, startv, stopv, stime, points)
smu
startv
stopv
stime
points
Details
Data for current measurements, voltage 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 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
7-334
Series 2600B System SourceMeter® Instrument Reference Manual
(on page 5-20)
Affected by
®
System SourceMeter instrument channel (for example, smua refers to SMU
channel A)
Sweep start voltage in volts
Sweep stop voltage in volts
Settling time in seconds; occurs after stepping the source and before performing a
measurement
Number of sweep points (must be ≥2)
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.
Where saved Default value
2600BS-901-01 Rev. B / May 2013