Keithley 2600a series - Page 567

2600AS-901-01 Rev. B / September 2008 Return to Section Topics 19-245
Series 2600A System SourceMeter® Instruments Reference Manual Section 19: Remote Commands
Table 19-6
KISweep TSP test script: SweepVLogMeasureI
TSP project name: KISweep
TSP test script name: KISweep
Function:
SweepVLogMeasureI(smu, startv, stopv, stime, points)
Description
Performs a logarithmic voltage sweep with current measured at every step (point):
• Sets the smu to output startv volts, allows the source to settle for stime
seconds and then performs a current measurement.
• Sets the smu to output the next volts step, allows the source to settle for
stime seconds and then performs a current measurement.
• Repeats the above sequence until the current is measured on the stopi
amps 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 5-point sweep (points = 5), a measurement will be performed at
MeasurePoint 1, 2, 3, 4 and 5.
LogStepSize = (log10(stopi) – log10(starti)) / (points – 1)
LogStep = (MeasurePoint – 1) x (LogStepSize)
SourceStepLevel = antilog(LogStep) x starti
Parameters smu, startv, stopv, stime, points
smu: SourceMeter instrument channel (A or B). Defaults to SMU A if all
parameters are omitted when function is called.
starti: Sweep start voltage in amps.
stopi: Sweep stop voltage in amps.
stime: Settling time in seconds. Occurs after stepping the source and before
performing a measurement.
points: Number of sweep measure points (must be ≥2).
Data Current measurements, voltage source values and timestamps are stored in
smuX.nvbuffer1.
startv
= Current measurement
stopv
stime
stime
stime