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2600AS-901-01 Rev. B / September 2008
Section 10: Triggering
Series 2600A System SourceMeter® Instruments Reference Manual
Timer delays
Timers can be configured to perform the same delay each time or configured with a delay list that
allows the timer to sequence through an array of delay values. All delay values are specified in
seconds.
•
Delay
– A delay is the period of time after the timer is triggered and before the timer generates a
trigger event. Use the following as an example to configure the delay attribute:
trigger.timer[N].delay = 10
•
Delay list
– A custom list can be configured to allow the timer to use a different interval each time it
performs a delay. Each time the timer is triggered, it uses the next delay in the list. The
timer repeats the delay list after all of the elements in the delay list have been used.
Use the following example to configure the delay list attribute:
-- Configure timer 4 to complete delays of 2 seconds, 10 seconds,
-- 15 seconds, and 7 seconds.
trigger.timer[3].delaylist = {2, 10, 15, 7}
NOTE Assigning a value to the delay attribute creates a one element delay
list.
Pass-through
When enabled, the timer generates a trigger event immediately when it is triggered. The timer
generates additional trigger events each time a delay expires. If the pass-through attribute is
disabled, the timer does not generate a trigger event until after the first delay elapses.
To enable passthrough mode, use the following command:
trigger.timer[N].passthrough = true
Triggering a timer
A timer can be configured to start a delay when a trigger object generates a trigger event. Timers
cannot be started with a command. A trigger event from a trigger object must be used to initiate a
delay.
Assigning the stimulus attribute
Assign the event ID to the
attribute to configure the timer to
start a delay when a specific trigger event occurs.
Use the following example to configure a source - delay - measure (SDM) cycle.
-- Configure the timer to begin when source action completes.
trigger.timer[1].stimulus = smua.trigger.SOURCE_COMPLETE_EVENT_ID
-- SMUA delay before a measurement begins.
smua.trigger.measure.stimulus = trigger.timer[1].EVENT_ID
