Programming a List Transient
l
l
l
l
Specify any trigger signals that the list should generate
l
Specify how many times you want the list to repeat
l
Specify how you want the list to end
Lists let you generate complex sequences of output changes with rapid, precise timing, which may be
synchronized with internal or external signals. In contrast to an output step, which is a one-time
output change, an output list is a sequence of output changes. Lists can contain up to 512 individually
programmed steps, and can be programmed to repeat themselves. Only the parameters associated
with one of the priority modes, either voltage or current priority, may be list controlled.
The voltage and current lists are paced by a separate dwell list that defines the duration or dwell of
each step. Each of the up to 512 steps can have a unique dwell time associated with it, which specifies
the time in seconds that the list will remain at that step before moving on to the next step.
Lists can also be trigger-paced, in which the list advances one step for each trigger received. This is
useful if you need an output list to closely follow triggered events. With a trigger-paced list, triggers
that are received during the dwell period are ignored. You can set the list dwell time to zero ensure
that no triggers are lost.
Lists can also generate trigger signals at specified steps. This is accomplished by two additional lists:
a beginning-of-step (BOST) and an end-of-step (EOST) list. These lists define which steps will
generate a trigger signal and if the trigger occurs at the beginning or end of the step. These trigger
signals can be used to synchronize other events with the list.
All lists (voltage, current, dwell, BOST, EOST) must be set to the same number of steps, otherwise an
error occurs when the list is run. For convenience, a list may be programmed with only one step or
value. In this case, a single-step list is treated as if it had the same number of steps as the other lists,
with all values being equal to the one value.
List data is not saved as part of a saved instrument state.
Program the list values
Example 1 If you are programming a voltage pulse or pulse train, set the amplitude of the pulse. For
example, to generate a pulse with an amplitude of 15 V, program the amplitude for the pulse (step 0),
and the amplitude for the off time (step 1).
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4 Using the Advanced Power System
Summary of Contents for N6900 Series
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