Tektronix KEITHLEY 2600B Series

Series 2600B System SourceMeter® instrument Reference Manual Section 9: TSP command reference
2600BS-901-01 Rev. F/August 2021 9-361
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(smuX, starti, stopi, stime, points)
X
Source-measure unit (SMU) channel (for example, smua.reset() applies to SMU
channel A)
starti
Sweep start current in amperes
stopi
Sweep stop current in amperes
stime
Settling time in seconds; occurs after stepping the source and before making
a measurement
points
Number of sweep points (must be ≥ 2)
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