Trigger

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Trigger patterns

Trigger patterns: The lowest six bits of the triggerPattern word (mask value=0x3f) record the status of the raw trigger inputs. Depending on the prescale settings, a trigger input may be present even if it was not included in the event trigger for that event.

Trigger input Bit pattern Value
COSMIC 0x00001 1
TRIGCLK 0x00002 2
SO 0x00004 4
S1 0x00008 8
S2M 0x00010 16
CER 0x00020 32


The remainder of the bits (mask value=0xffffff40) record which prescaled coincidence trigger was actually used to form the event trigger.

Event trigger Bit pattern Value
S2M_NCER_SCALED 0x00040 64
S2M_CER2_SCALED 0x00080 128
S2M_CER_SCALED 0x00100 256
S1_CER_SCALED 0x00200 512
S1_S2M_SCALED 0x00400 1024
S0_CER_SCALED 0x00800 2048
S0_S2M_SCALED 0x01000 4096
S0_S1_SCALED 0x02000 8192
TRIG_VME 0x04000 16384
COSMIC_SCALED 0x08000 32768
TRIGCLK_SCALED 0x10000 65536

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