Keithley 2461 Reference Manual

Section
6: SCPI command reference Model 2461 Interactive SourceMeter® Instrument
Reference Manual
6-120 2461-901-01 A/November 2015
Before configuring a pulse operation, configure your measure settings. Pulse operations use the
measure settings that were last defined before the pulse operation; you may get unexpected results if
you do not define the measure settings first.
When the pulse sweep is started, the instrument sources a specific voltage or current value to the
device under test (DUT). A measurement is made for each point of the pulse sweep.
When the pulse sweep command is sent, it clears the existing trigger model and creates a new trigger
model. To run the pulse sweep, initiate the trigger model.
The pulse sweep continues until the source outputs the specified stop level. At this level, the
instrument performs another measurement and then stops the pulse sweep.
The asymptote changes the inflection of the pulse sweep curve and allows it to sweep through zero.
You can use the asymptote parameter to customize the inflection and offset of the source value
curve. Setting this parameter to zero provides a conventional logarithmic sweep. The asymptote
value is the value that the curve has at either positive or negative infinity, depending on the direction
of the sweep. It must be outside of the range defined by the starting and ending values.
This command updates a source configuration list named CurrPulseLogSweepList or
VoltPulseLogSweepList, depending on the source function.
If measurements are enabled, this command creates a measure configuration list named
MeasCurrPulseLogSweepList or MeasVoltPulseLogSweepList.
Example
*RST
SOUR:FUNC VOLT
SOUR:VOLT:READ:BACK ON
SOUR:VOLT:RANG 100
SENS:FUNC "CURR"
SENS:CURR:RANG 1
SENS:CURR:NPLC .1
SENS:CURR:AZER OFF
SOUR:PULS:SWE:VOLT:LOG 0, 1, 100, 50, .02, ON, "defbuffer1", 0, 80e-3, 5, 1, 1
INIT
Reset the instrument to its default settings.
Set the source function to voltage and the source voltage range to 100 V.
Set the measure function to current and the measure current range to 1 A.
Turn on source readback, disable autozero, and set the NPLC to 0.1.
Set up a logarithmic sweep from 1 V to 100 V in 50 steps. Set the pulse width to 20 ms, the off time to 80 ms,
and repeat the sweep five times.
Start the pulse sweep.
Also see
Pulse operation (on page 3-64)
:SOURce[1]:PULSe:LIST:<function> (on page 6-107)
:SOURce[1]:SWEep:<function>:LOG (on page 6-130)
Trigger model (on page 3-107)

Keithley 2461 Specifications

General

Maximum Current	7 A
Power	100 W
Resolution	6.5 digits
Source Measure Unit (SMU)	Yes
DC Voltage	100 V
Maximum Voltage	100 V
Display	5-inch capacitive touchscreen
Connectivity	USB, GPIB
Software	TSP
DC Current	7 A
Current Source Range	0 to 7 A
Voltage Measurement Range	100 mV to 100 V
Current Measurement Range	10 nA to 7 A
Voltage Measurement Resolution	100 nV