USC 55 Layout w/Rack Wizard

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USC 55 Layout w/Rack Wizard
Spare Rack
To GCT
View from the front of the racks, crate
arrangement is necessary for sharing of e/g data
on cables.
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Remapping of crates in USC55 necessary to reduce
latency. f 0º is closest to electronics
hall. Figures will updated in new document - and
resubmitted.
http//cmsdoc.cern.ch/ wsmith/USC55_racks_v55.ht
ml
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HTR to RTC crates organized for shortest paths
Two sets of HF cables set the longest
path.(lt10m).
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• Remarks
• We can organize our crates to have HTR to Cal
  Regional trigger cables less than 10 meters. (10
  meter target proposed by trigger group).
• With 10 meter cables we have some room to change
  the organization of HB and HE HTR crates. We may
  want to do this for the following reasons
• Unforeseen complexities with fiber mapping in
  the patch panels. This needs to be looked at in
  detail (including calibration readout).
• Optimize optic cable lengths. HF appears to be
  the longest, so I dont believe that this would
  gain us much. This should be checked once solid
  HF length numbers are available.
• HO?
• Other reasons?
• With the information available to me at this
  time I have no objections to the trigger crate
  layout presented during electronics week, and
  believe that we can comfortably fit within the
  proposed 10 meter cable limit.