CABLES ENTERING THE M111 TIER 2 BACKPLANE 24-SEP-1992 I. Overview This document describes the entrance of cables to a Tier 2 Backplane. Here it is assumed that the "order correction" takes place elsewhere, as there is absolutely no room here for that. Note that the "power supply controller box" that is normally located on top of a rack cannot be present on the top of a rack containing a Tier 2/3 Backplane. It will be suspended from the ceiling of the MCH. The cables arrive at paddleboards installed in the rear of a Tier 2 Backplane. These paddleboards are supported by nylon "stilts." Note that the M111 Tier 2 cables have the Reference Sets correctly designated from 0..3 (rather than from 1..4 as in M105 Tier 2 cables) II. Drawings of rack ----------------- --------. ------------------ \ --------------. ---------|------- --------------.\ .-------- | --------------.\\ --------/--------- | --------------.\\\ | | \\\\ # | ######### | # ################## |||| # # | ---| # # |||| # # |--- | # # |||| # # | ---| # # ----'||| # # |--- | # # -----'|| # # | | # # ------'| # # | | # # -------' # Front View Side View Rack: # Horizontal Cable: - Vertical Cable: | Angled Cable: \ / , . Note that, as the cables "wrap" around the back of the rack, the top cable becomes the bottom cable. This is shown explicitly in the numbering below. III. Cables ordered at top of rack: REAR VIEW 204 203 202 201 208 207 206 205 . . . . . . . . 244 243 242 241 248 247 246 245 Note that, as the cables approach, e.g. cables 1-4 will be stacked vertically. It is not clear (nor important) whether they peel off like: --201 -----204 ---202 or ----203 ----203 ---202 -----204 --201 IV. Cables entering cards: REAR VIEW neg. ETA pos. ETA --------- --------- +PY SUM FOR |eta| 17 to 20 248 247 246 245 ^ ^ ^ ^ | | | | phi = 9..16 ---+ | | | | | | 1..8 ---------+ | | | | 9..16 ---------------+ | | 1..8 ---------------------+ -PY SUM FOR |eta| 17 to 20 244 243 242 241 ^ ^ ^ ^ | | | | phi = 25..32 ---+ | | | | | | 17..24 ---------+ | | | | 25..32 ---------------+ | | 17..24 ---------------------+ +PX SUM FOR |eta| 17 to 20 240 239 238 237 ^ ^ ^ ^ | | | | phi = 25..32 ---+ | | | | | | 1..8 ---------+ | | | | 25..32 ---------------+ | | 1..8 ---------------------+ -PX SUM FOR |eta| 17 to 20 236 235 234 233 ^ ^ ^ ^ | | | | phi = 17..24 ---+ | | | | | | 9..16 ---------+ | | | | 17..24 ---------------+ | | 9..16 ---------------------+ HD SUM FOR |eta| 17 to 20 232 231 230 229 neg ETA 228 227 226 225 pos ETA EM SUM FOR |eta| 17 to 20 224 223 222 221 neg ETA 220 219 218 217 pos ETA TOT Et REF. SET 3 FOR |eta| 17 to 20 216 215 214 213 neg ETA 212 211 210 209 pos ETA TOT Et REF. SET 2 FOR |eta| 17 to 20 216 215 214 213 neg ETA 212 211 210 209 pos ETA TOT Et REF. SET 1 FOR |eta| 17 to 20 216 215 214 213 neg ETA 212 211 210 209 pos ETA TOT Et REF. SET 0 FOR |eta| 17 to 20 216 215 214 213 neg ETA 212 211 210 209 pos ETA EM Et REF. SET 3 FOR |eta| 17 to 20 208 207 206 205 neg ETA 204 203 202 201 pos ETA EM Et REF. SET 2 FOR |eta| 17 to 20 208 207 206 205 neg ETA 204 203 202 201 pos ETA EM Et REF. SET 1 FOR |eta| 17 to 20 208 207 206 205 neg ETA 204 203 202 201 pos ETA EM Et REF. SET 0 FOR |eta| 17 to 20 208 207 206 205 neg ETA 204 203 202 201 pos ETA ^ ^ ^ ^ ^ ^ ^ ^ | | | | | | | | phi = 25..32 ---+--+ | | | | | | | | | | | | 17..24 ---------+--+ | | | | | | | | 9..16 ---------------+--+ | | | | 1..8 ---------------------+--+ NOTE: These cables are labelled correctly with respect to Reference Sets.