Keithley 2601B Reference Manual page 180

Series 2600B System SourceMeter® Instrument Reference Manual
Timer action overruns
The timer generates an action overrun when it generates a trigger event while a timer delay is still in
progress. Use the status model to monitor for the occurrence of action overruns (for details, see the
Status model
Using timers to perform pulse mode sweeps
Timers can also be used to control the pulse width during a pulsed sweep. To create a pulse train, a
second timer must be used to configure the pulse period. The examples below show a single pulse
output and a pulse train output.
The SMU end pulse action smuX.trigger.endpulse.action must be set to
smuX.SOURCE_IDLE in order to create a pulse.
Single pulse example:
The programming example below illustrates how to use a single timer to control the pulse width of a
single-shot pulse measurement. The programming example configures the timer and SMU as follows:
Timer 1: Pulse width timer
•
Set the delay attribute of a timer equal to the appropriate pulse width.
•
Configure the timer to trigger when the SMU moves out of the arm layer of the trigger model.
•
Assign the trigger event generated by the timer to the stimulus input of the SMU end pulse event
detector.
SMU A
•
Configure the source action to start immediately by setting the stimulus input of the source event
detector to 0.
•
Set the end pulse action to SOURCE_IDLE.
2600BS-901-01 Rev. B / May 2013
Figure 68: Using a timer for an SDM cycle
(on page 5-14, on page E-1)).
Section 3: Functions and features
3-45