DT Trigger links

1
DT Trigger links

• Outline
• From local trigger to Sector Collector
• From Sector Collector to Regional Trigger

2
DT trigger links layout
Detector in UXC

• LVDS link
• Ethernet cables FTP cat. 6.
• rate 480 Mbps _at_ max 40 m

Trigger Boards (BTI,TRACO,TSS)
C C B
Minicrate
LVDS copper link
Towers in UXC
Sector Collector
Opto link

• Opto-link
• multimodal fibers 850 nm
• 1.6 Gbps _at_ 100 m

Counting room in USC
GLOBAL MUON TRIGGER
3
Trigger Server to SectorCollector LVDS link

• For each Trigger Server use a unique stream for ?
  ?
• - 80 bits (2 tracks)/BX _at_ 40 MHz
• LVDS link on lt 30m shielded copper cable
• 2 cables/minicrate (Ethernet class 6 FTP, 4
  pairs/cable)
• Chipset from National Semiconductors
• Serializer 10-to-1 DS92LV1021 (8 chip/link)
• Cable equalizer CLC014 (8 chip/link)
• Deserializer 1-to-10 DS92LV1212A (8 chip/link)
• Total quantities 2000 links (chipsets) 12 km
  of cable

Deserializer 1 to 10
Serializer 10 to 1
Equalizer
TX
RX
4
LVDS link test

• Test of 8 links 8 serializers 8 (equalizers
  deserializers) as needed for a complete Trigger
  Server data transfer.
• Use two cables of 40 m (max foreseen is 30 m).
• Inject random patterns _at_ 40 MHz TX rate 480
  Mbps

• Succesfully tested for
• expected working conditions,
• Clock jitter tolerance,
• Bit Error Rates,
• radiation tolerance.

2x40 m ethernet cable FTP cat.6
5
LVDS link test setup
RX
TX
40m Cable
Pattern Units
6
LVDS link test results
7
SectorCollector to DT-TrackFinder opto-link

• ? stream 110 bit (4 tracks) per sector/BX _at_ 40
  MHz
• ? stream 42 bit (3 tracks) per sector/BX _at_ 40
  MHz
• Opto-link with multimodal 850 nm fibers (length lt
  100 m)
• use GOL _at_ 1.6 Gb/s (32 bits _at_ 40 MHz)
• ? stream 4 links/sector
• ? stream 2 links/sector
• 360 links/detector
• Laser (Tx) and PIN-detector (Rx) under evaluation

PIN
Deserializer TLK 2501
GOL
VCSEL
Agilent HFBR-772 HFBR-782 Honeywell HFE4190-541
HFD3180-102
8
SectorCollector to DTTF opto-link arrangement
1 Plugin board/ DTTF ? 4 Rx / board
Wedge arrangement
2
1
0
-0
2
-1
-2
1
DTTF ? Wheel 2 to 2 (6 board/wedge)
0
-1
-2
Sector Collector Wedge xx Wheel 2 to 2 (5
board/wedge)
Same board-layout
The two boards for wheel 0 and 0 share same
inputs from SC of wheel 0
DTTF ? Full Wedge (1 board)
40 LVDS Rx / sector
2 Plugin board/ DTTF ? 5 Rx / board
6 GOL Tx / sector
DTTF crate- backplane