Keithley 2657A User Manual

Section 7: TSP command reference Model 2657A High Power System SourceMeter® Instrument Reference Manual
7-44 2657A-901-01 Rev. B/December 2012
Details
Data for pulsed current measurements are stored in the reading buffer specified by the buffer input parameter.
This function configures a logarithmic pulsed voltage sweep with a current measurement at each point.
Measurements are made at the end of the ton time.
The magnitude of the first pulse will be start volts; the magnitude of the last pulse will be stop volts. The
magnitude of each pulse in between will be LogStep
n
volts larger than the previous pulse, where:
LogStepSize = (log10(stop) - log10(start)) / (points -1)
LogStep
n
= (n - 1) * (LogStepSize), where n = [2, points]
SourceStepLevel
n
= antilog(LogStep
n
) * start
This function does not cause the specified smu to output a pulse train. It does check to see if all the pulse
dimensions can be achieved, and if they can, assigns the indicated tag or index to the pulse train.
Figure 114: ConfigPulseVMeasureISweepLog()
Example
ConfigPulseVMeasureISweepLog(smua, 0,
10, 1000, 10e-3, 20e-3, 100e-3, 10,
smua.nvbuffer1, 6)
Set up a pulsed logarithmic sweep that uses System
SourceMeter
®
instrument channel A. The pulsed
sweep starts at 10 V, ends at 1000 V, and returns to
a 0 V bias level between pulses. Each pulsed step is
on for 20 ms, and then at the bias level for 100 ms.
The current limit is 10 mA during the entire pulsed
sweep. The pulse train is comprised of 10 pulsed
steps, and the pulse train is assigned a tag index of
6.
Also see
InitiatePulseTest() (on page 7-102)
KIPulse factory script
(on page 5-20)
start
stop
Measurement (1/NPLC seconds)
LogStep
2
LogStep
3
bias
Last source value before pulse train was initiated
Pulse initiated here
ton toff

Keithley 2657A Specifications

General

Brand	Keithley
Model	2657A
Category	Measuring Instruments
Language	English