Chapter 5 Gate Mode Operation 93
5.14.3 Trigger Expander
The Trigger expander is used to configure the trigger source to be used for trigger gating.
Valid sources for the Trigger Input are:
• Internal
Figure 5-26 illustrates typical configuration parameters for Internal triggering.
Figure 5-26: Typical Trigger Expander: Internal Trigger Source Parameters
Internal triggering uses the user-specified Internal Trigger Frequency that has
been selected on the
SuperSYNCHRO Timing expander. Refer to Section 5.14.4,
SuperSYNCHRO Timing Expander, for additional information.
• External
Figure 5-27 illustrates typical configuration parameters for External triggering.
Figure 5-27: Typical Trigger Expander: External Trigger Source Parameters
External triggering requires that an external trigger be defined so LightField will be
able to recognize it when it occurs at the
TRIGGER IN BNC on the rear of the
PI-MAX4 device.
In addition, the logic level for the
LOGIC OUT signal is also defined on this expander.
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