2600S-901-01 Rev. C / January 2008
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13-9
Series 2600 System SourceMeter® Instruments Reference Manual
Section 13: Factory Scripts
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
startv
= Current measurement
stopv
stime
stime
stime
Parameters
smu, startv, stopv, stime, points
smu:
SourceMeter 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
.
Table 13-6 (continued)
KIGeneral TSP test script: SweepVLogMeasureI
TSP project name:
KIFactoryGeneral
TSP test script name:
KIGeneral
Firmware version:
1.0.2 and later
