Level-1 Trigger Qualifiers

 Version (Jan-29-2002) Jim Linnemann's definition

Trigger Qualifier Bit Definition
The L1 Trigger Qualifiers are collected into a 16-bit word broadcast as part of the SCL data by the MBT. HW or Std refer to "hardware" type or "standard" type qualifiers. Dan Edmunds' definition of these is:
A Standard L1_Qualifier is asserted for a given event if any one of a defined subset of the 128 L1 Specific Triggers fired for that event. The "defined subset" of L1 Specific Triggers for each of the 12 Standard L1_Qualifiers is setup by COOR at the COOR to Trig FW trigger download time, i.e. their meaning is dynamic and can be moved by COOR to fit the user's requirements.
A Hardware L1_Qualifier is asserted if its electrical input control signal is asserted. These are hard wired so they can not be moved about by COOR.
Bit Name HW/Std Description
00 L2ForcedWrite Std equiv to L2UnbiasedSample
01 L2GlobalNeeded Std all L2
02 L2MuNeeded Std L2MUC,F
03 L2UnbiasedSample HW Full Readout
04 L2EmNeeded Std L2CAL
05 L2JetNeeded Std L2CAL
06 L2EtMissNeeded Std L2CAL
07 CollectStatus HW Monitoring
08 L2PSNeeded Std L2PS
09 L2TrackNeeded Std L2CTT
10 L2ImpactNeeded Std L2CTT
11 reserved HW  
12   Std  
13   Std  
14 L2STTNeeded Std L2STT
15 reserved HW  


SCL Data on the Link
This SCL data is received on channel-0 of the SLIC and has the following format when broadcast on the link with routing bits V[5..1]=11111. See Arthur's data format page (SCL inputs to SLIC).
Word # Byte-3 Byte-2 Byte-1 Byte-0
1 0 0x8 0 0
2 0 bunch xing rotation # hi rotation # lo
3 0 0 0 0
4 0 status L1 Qaul hi L1 Qual lo
5 input channel trailer word


Status Bit Definition
Bit Definition
0 L1 Period
1 L1 Accept
2 L2 Period
3 L2 Accept
4 L2 Reject
5 Init Section
6 0
7 0