Media: copper, LVDS-28 bit
Record Length: fixed, 7 frames

TS\Bit	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
1	BOR			HP	PM				L1	SCL	FX		E	W	N	S					Data Type					Rec Type
2				HP					U SH 1		U MIP 1		V SH 1		V MIP 1		U SH 0		U MIP 0		V SH 0		V MIP 0
3				HP					U SH 3		U MIP 3		V SH 3		V MIP 3		U SH 2		U MIP 2		V SH 2		V MIP 2
4				HP					U SH 5		U MIP 5		V SH 5		V MIP 5		U SH 4		U MIP 4		V SH 4		V MIP 4
5				HP					U SH 7		U MIP 7		V SH 7		V MIP 7		U SH 6		U MIP 6		V SH 6		V MIP 6
6					Vertical Parity
7

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"

SCL = L1accept control bit (forces the FPTT to transmit a L3 record)

SCL = SCLinit control bit

FX = First Crossing control bit marks bunch crossing number 7

E/W = Identifies the East or West side of an end cap

N/S = Identifies the North or South end cap

Data Type = L1FPS, "00010"

Rec Type = L1 record, "111"

U SH 1: cluster counts identified by:

• Fiber orientation: U or V
• Layer: Shower (SH) or MIP (MIP)
• Relative wedge number within the quadrant, range 0-7

Vertical Parity = Vertical Parity bit calculated over frames 1-5

Revision History

2 November 2005: created JTO
4 January 2005: added parity links