168 Sequoia Series
Single Triggers
By sending one of the following over the IEEE-488:
• INIT
• *TRG
• a group execute trigger
Continuous Triggers
By sending the following commands over the IEEE-488:
• TRIGger: SOURce IMMediate
• INITiate:CONTinuous ON
When the trigger system enters the Output Change state upon receipt of a trigger (see
Figure 6-5), the triggered functions are set to their programmed trigger levels. When the triggered
actions are completed, the trigger system returns to the Idle state.
Specifying a Dwell Time for Each List Point
Each voltage and frequency list point has an associated dwell time specified by:
LIST:DWELl <n> ,<n>
where <n> specifies the dwell time in seconds. The number of dwell points must equal the number of
output points. If a dwell list has only one value, that value will be applied to all points in the output list.
After each new output level or point is programmed, the output remains at that point in the list for the
programmed dwell interval before the list advances to the next point. Only an ABORt command can
transfer the system out of the Dwelling state.
At the end of the dwell interval, the transition to the next state depends on whether or not the list has
completed its sequencing and the state of the LIST:STEP command (see
Figure 6-5).
If the list is completed, the trigger system returns to the Idle state.
If the list is not completed, then the system reacts as follows:
LIST:STEP ONCE programs the trigger system to return to the Initiated state to wait for
the next trigger.
LIST:STEP AUTO programs the trigger system to immediately execute the next list
point.
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