Keithley 2600a series, Reference Manual, Page: 166 / 696

9-10 Return to Section Topics 2600AS-901-01 Rev. B / September 2008
Section 9: Sweep Operation Series 2600A System SourceMeter® Instruments Reference Manual
Pulsing in the extended operating area (EOA)
Pulse sweeps can be performed outside of the standard operating area by setting the appropriate
compliance level. Please review the specifications for the Series 2600A to determine the
maximum current and voltage values available in pulse mode. When pulsing in the extended
operating area (EOA), the SMU will force the pulse to end early if the pulse width exceeds the
maximum value. It will also hold off the next source action as necessary to stay within the duty
cycle capabilities of the SMU.
Pulse duty cycle
Duty cycle is the percentage of time during the pulse period that the output is on. It is calculated as
follows:
Duty cycle = Pulse width / (Pulse width + Off time)
For example, if the pulse width is 10ms and the off time is 90ms, the duty cycle is calculated as
follows:
Duty cycle = 10ms / (10ms + 90ms)
= 10ms / 100ms
= 0.10
= 10%
Configuring and running sweeps
Configuring other sweep attributes
Compliance
Voltage and current limits can be configured using the
smuX.trigger.source.limitY
attributes which set the sweep source limits. For example, to set the sweep limit to 10V:
smua.trigger.source.limitv = 10
End sweep action
Use the end sweep action to configure the source action at the end of the sweep. The SMU can be
programmed to return to the idle source level or hold the last value of the sweep. Configure the
end sweep action by setting the
smuX.trigger.endsweep.action
attribute. For example,
send the following command to program SMU A to return the source back to the idle source level
at the end of a sweep:
smua.trigger.endsweep.action = smua.SOURCE_IDLE