These slides are not for public distribution'

1

• These slides are not for public distribution.
• They are intended to pass on measurements
  observations made _at_ UXC55.
• They do not represent any sort of final analysis
  of real cable lengths needed.
• Estimates for connectors (dist angular) and
  real bend radius of cables is unknown. The
  guesses here come from measurements of skewclear
  cables.

2
Rack layouts/mmentswesley rack
pagehttp//cmsdoc.cern.ch/wsmith/USC55_racks.htm
l mments made _at_ UXC55 15/11/05
front View
Existing tray network
45cm
4cm
CSC TF
CSC TF
DT TF
DT TF
DT TF
250cm56u 4.5cm/u
5cm
240cm
Bottom of girder
34cm
3
projection for longest cable--gtDTTF, going
under,gthighest part of any DT-TF crate
46u207cm5 upgt highest part CSC TF crate will
be 40u1805cm upgt1u4.5cmgtPi/2 bends cost 25cm
gtlay longest cable first, others can fit around
it.gtno idea of combs strain relief
accountedgtthis is for a cable tray running flush
with bot of rack!!!
front View
CSC TF
CSC TF
DT TF
DT TF
DT TF
212cm
185cm
240cm
185240212(425)7.37m if cable tray runs
along bot girder then 7.37m(234)8.05m
4
projection for longest cable--gtDTTF, going
over,gtlowest part of any DT-TF crate
28u126cm4 down from topgtlowest part CSC TF
crate will be 46u2074 downgt1u4.5cmgtPi/2
bends cost 25cm gtlay longest cable first, others
can fit around it.gtno idea of combs strain
relief accountedgtthis is for a cable tray
running flush with bot of rack!!!
front View
240cm
CSC TF
CSC TF
DT TF
DT TF
DT TF
211cm
130cm
130240211(425)6.81m if cable tray on level
with existing one 6.81m(245)7.71m
5
MS-gtGMT path
Top View
CSC TF
CSC TF
DT TF
DT TF
DT TF
167cm
156,166cm
60cm
Cal Global?
GMT?
6
projection for abs min length longest cablegt
lowest part CSC TF crate will be 24u below turbgt
Pi/2 bends cost 25cm gtlay longest cable first,
others can fit around it.gtno idea of combs
strain relief accountedgtcable tray runs straight
from top rack-gttop rack, across any diagonal (up
to side 60cm possible!!! )gtcable routing
straight up from MS, not tidied down side of
rackgtbot of GMT card (in GT crate) is 36U below
top162cm4
side View
133160166(425)559 cmif cable tray runs _at_
same height as existing network
then559(245)649cm