Media: copper, LVDS-28 bit
Record Length: variable, 3-27 frames depending on the number of found tracks

27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
BOR			HP	PM		Octant			#OBJ VP			#OBJ						#OBJ HP		Data Type					Rec Type
			HP	Turn																Tick
			HP	Track Object(s)
				Vertical Parity

Field Definitions

note: empty cells or cells marked 'reserved' will contain zeros

BOR = beginning of record, "111"

HP = Horizontal Parity bit

PM = Pass-and-Mark, not supported, "00"

Octant = The octant number, range 0-7

#OBJ VP = Vertical Parity bits for the #OBJ field

#OBJ = The number of Track Objects contained in this record, range 0-24

#OBJ HP = Horizontal Parity bits for the #OBJ field

Data Type = L2CFT, "00101"

Rec Type = L2 record, "000"

Turn = The accelerator turn (revolution) number

Tick = The accelerator bunch crossing number

Track Object = Found tracks are listed and sorted by PT in descending order.
Each track object is 24 bits, defined as:

• bits [23:20]: RA PSC CPSax. The relative address of the CPS cluster center, range 0-15
• bits [19:16]: RA TS CFT/CPSax. The relative address of the trigger sector in the octant, range 0-9
• bit 15: T. Set to indicate that this track is associated with a CPS cluster
• bit 14: L. Zero, loose CPS association not supported
• bit 13: C. Track curvature
• bits [12:11]: PT. Track PT bin ("00" = Max, "01" = High, "10" = Medium, "11" = Low)
• bits [10:8]: PT EXT. Extended PT information
• bit 7: R. Set to indicate that the track matched to a cluster outside the home sector
• bits [6:1]: Phi. The relative address (within a sector) of the track H layer doublet, range 1-44
• bit 0: ISO. Set to indicate an isolated track

Revision History

1 November 2005: created JTO

3 January 2006: added parity links

23 March 2006: dfea2 name change