Number of Chains and CRAMS

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• Number of Chains and C-RAMS
• One Unit Module (UM) consists of 24x24 576
  cells
• In total there are 72 UM per plane.
• Two planes 72 x 2 144 Unit Modules.
• 3 of UM are daisy chained in ONE Chain 1728
  channels
• Total number of Chains 144/3 48
• One UM has 9 Gassiplex Boards each of 4 chips
• ( 64 Multiplexed channels for board)
• In ONE Chain 27 Nos. Gassiplex-4 boards will be
  daisy chained
• One C-RAM has 2 Blocks
• One Block 2K Channels and Total 4K
  Channels/C-RAM
• 1728 channels/Block will be used
• Total Nos. of C-RAMS required are 24.

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PMD DAQ SETUP at STAR
RACK-1
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Cable layout from PMD Racks to PMD FEE
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PMD Trigger Timing
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PMD TRIGGER SETUP
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DAQ Coordinates (CRATE,CRAM,CRAM_BLK,CRAM_CH)whe
reCRATE is 0..1CRAM is 0..11, 0 is the
leftmost module in the crateCRAM_BLK is 0..1,
0 is the bottom blockCRAM_CH is 0..1727
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Pedestals Plot of Sector No. 0 CRAM No. 0 BLK No.
0
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Pedestals Plot of Sector No. 0 CRAM No. 11 BLK
No. 0