PCD as the Event Number Generator
Event#&Type code is 16bit word. Bits 0:11 represent sequential event number, bits 12:16 event type.
All Phobos event types could be divided into 2 category:
Normal Event when no special action required for any ROCs to handle the event.
Special Event when special action required at least in one ROC. The typical event is the non zero-suppressed events in TOF.
The additional information about enabled and actual trigger conditions could be obtained from the Trigger subevent. For example to identify that event was generated by TOF LED pulser, one need to check certain bit in the LVL0_TR word in the Trigger subevent.