EDMS Number:
ATLAS
EDMS Id:
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ATLAS Level-1 Calorimeter Trigger
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FOX Demonstrator
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Design document
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Document Version:
Draft 0.7
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Document Date:
10 November 2015
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Prepared by:
Yuri Ermoline1, Murrough Landon2, Philippe Laurens1,
Reinhard Schwienhorst1
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Michigan State University, East Lansing, MI, USA
Queen Mary, University of London, London, UK
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Document Change Record
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Date
20 March 2015
03 April 2015
10 April 2015
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2 June 2015
21 June 2015
5 November 2015
10 November 2015
Comment
Initial document layout
Comments from PDR, Reinhard, Philippe
MTP connector fibre numbering, sliding rails
Chapters 2.1.2, 2.2.4, 2.3.2
Clarifications
Modifications
FOX demonstrator implementation
Different corrections and improvements
FOX Demonstrator
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TABLE OF CONTENTS
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1.
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1.1.
FOX DEMONSTRATOR OVERVIEW
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1.2.
CONVENTIONS
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1.3.
RELATED PROJECTS
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1.4.
REFERENCE MATERIALS
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2.
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2.1.
INTRODUCTION
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FOX DEMONSTRATOR
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INPUTS TO THE DEMONSTRATOR
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2.1.1.
Input from CMX module
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2.1.2.
Input from FTM module
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2.1.3.
Input from LAr (LDPS)
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2.1.4.
Input from Tile (TREX)
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OUTPUTS FROM THE DEMONSTRATOR
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2.2.1.
Outputs to CMX and FTM
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2.2.2.
Output to eFEX module
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2.2.3.
Output to jFEX module
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2.2.4.
Output to gFEX module
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2.2.
DEMONSTRATOR PARTITIONING AND HOUSING
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2.3.1.
Demonstrator partitioning
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2.3.2.
Demonstrator housing
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2.3.3.
Feed-through
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2.3.
OPTICAL CABLES AND SPLITTERS
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2.4.1.
Trunk cables to/from FOX demonstrator
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2.4.2.
Fan-out cables
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2.4.3.
Passive splitters
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2.4.
POSSIBLE MAPPING SCENARIOS
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2.5.1.
Tests with CMX and FTM
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2.5.2.
Tests with eFEX
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2.5.3.
Tests with gFEX
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2.5.
2.6.
TOOLS
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2.6.1.
LC cleaning set
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2.6.2.
optical power meter fluke networks FTK-1000
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APPENDIX A. MEASUREMENTS AND TESTS
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FOX Demonstrator
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1. INTRODUCTION
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1.1. FOX DEMONSTRATOR OVERVIEW
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This document describes the Fiber Optics eXchange (FOX) demonstrator for integration tests in 2016
and for future integration and studies. The demonstrator pursues two main goals:
 Provide the light path between the transmitter MiniPODs of the FEX Test Module (FTM), Liquid
Argon (LAr) and Tile Calorimeter (Tile) Front-Ends and the receiver MiniPODs of the Feature
Extractor (FEX) modules of l1calo.
 Provide mechanical building blocks necessary to construct an overall physical plant providing the
required management and mapping of all the fibres and its installation in USA15.
The initial proposal for the FOX demonstrator was presented in the FOX Project Specification [1] and
shown in Figure 1:
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Figure 1: Draft diagram of the FOX Optical demonstrator.
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This drawing shows the light path between transmitting and receiving MiniPODs. The input side is
defined as a 48-fiber MTP connector(s) (LAr and Tile side) or a 24-fiber MTP connector(s) (FTM, not
shown on the initial proposal); the output side is defined as a 48-fiber (eFEX side) or 72-fiber MTP
connector(s) (jFEX and gFEX side).
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The FOX demonstrator will map each of the input fibre to a specific FEX destination. It will also
provide passive duplication (optical splitting) of some of the fibres.
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Reminder: the initial idea of the FOX partitioning (see Figure 2) is that it separated into five sets of
modules by mapping functionality. The two input module sets are the LArFox and the TileFox which
organize the fibres by destination. The three output module sets are eFox, jFox and gFox, which
provide the final fibre ribbon by fibre ribbon mapping and provide fibre duplication as required.
eFox
LAr supercells
Tile eFEX t owers
eFEX
jFox
LAr t rigger t owers
Tile jFEX t owers
jFEX
LAr supercells
LAr LAr t rigger t owers
DPS
LAr gTowers
LArFox
Tile eFEX t owers
JEP
Tile jFEX t owers
TileFox
Tile gTowers
LAr gTowers
gFox
Tile gTowers
gFEX
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Figure 2: Overview of optical plant partitioning.
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1.2. CONVENTIONS
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The following conventions are used in this document:
 The term “FOX” is used to refer to the Phase-I L1Calo Optical Plant – Fex Optics eXchange or
Fiber Optics eXchange (FOX). Alternate names are “fiber plant” or “optical plant” or “FEX
optical plant”.
 eFEX – electron Feature EXtractor.
 jFEX – jet Feature EXtractor.
 gFEX – global Feature EXtractor.
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1.3. RELATED PROJECTS
[1] FOX Project Specification, v0.14, 11 November 2014.
https://edms.cern.ch/file/1430017/1/FOX_PDR_v0.14_11.11.2014.pdf
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[2] ATLAS Liquid Argon Phase 1 Technical Design Report, CERN-LHCC-2013-017,
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[3] ATLAS Tile Calorimeter, http://atlas.web.cern.ch/Atlas/SUB_DETECTORS/TILE/
[4] ATLAS L1Calo Jet-PPM LCD Daughterboard (nLCD)
[5] Electromagnetic Feature Extractor (eFEX) Prototype, v0.2, 6 February 2014,
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https://cds.cern.ch/record/1602230
https://twiki.cern.ch/twiki/pub/Atlas/LevelOneCaloUpgradeModules/eFEX_spec_v0.2.pdf
[6] Jet Feature Extractor (jFEX) Prototype, v0.2, 14 July 2014,
http://www.staff.uni-mainz.de/rave/jFEX_PDR/jFEX_spec_v0.2.pdf
[7] Global Feature Extractor (gFEX) Prototype, v0.3, 16 October 2014,
https://edms.cern.ch/file/1425502/1/gFEX.pdf
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[8] High-Speed Demonstrator (HSD), v1.5, 18 July 2011,
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[9] FEX Test Module (FTM), v0.0, 18 July 2014,
https://twiki.cern.ch/twiki/bin/view/Atlas/LevelOneCaloUpgradeModules
http://epweb2.ph.bham.ac.uk/user/staley/ATLAS_Phase1/FTM_Spec.pdf
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1.4. REFERENCE MATERIALS
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The Fiber Optic Association Guide: http://www.thefoa.org/tech/ref/contents.html
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2. FOX DEMONSTRATOR
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The inputs and outputs to/from the FOX demonstrator are optical signal carried by multi-fiber ribbon
cables with parallel Multi-fiber Termination Push-On (MTP) connectors – improved version of the
MPO connector (known as multi-fiber push-on and also as multi-path push-on) – a multi-fiber
connector defined according to IEC 61754-7 and TIA/EIA 604-5 that can accommodate12-72 fibers:
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Figure 3: MPO cable female connector for accommodating 24 fibers.
The following convention will apply to the optical connectors:
 All optical connectors on the FOX demonstrator modules are MALE,
 All optical connectors on the cables, connected to FOX demonstrators, are FEMALE.
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Figure 4: Convention for optical connectors.
The fibre numbering within a connector and fibre colours:
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Figure 5: Fibre numbering in 12-fibers MTP.
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Figure 6: Fibre numbering in 48-fibers MTP.
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Figure 7: Fibre numbering in 72-fibers MTP.
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2.1. INPUTS TO THE DEMONSTRATOR
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The FOX demonstrator will provide a set of MTP feedthroughs for different input connectors from
several possible data sources – from the L1Calo modules and from the calorimeter electronics. The
MTP feedthroughs are the same for all fibers count in the MTPs.
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2.1.1. Input from CMX module
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The contact persons from CMX to discuss issues: Wojtek Fedorko, wojtek.fedorko@gmail.com
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The CMX module may be the only possible data source/destination at the beginning of the
demonstrator integration studies. It is based on the Virtex 6 FPGAs, has both – 12-fiber transmitters
and 12-fiber receivers – but can only test a transmission speed up of 6.4 Gbps.
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The FOX demonstrator will provide one 12-fiber MTP male input connector for the CMX.
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2.1.2. Input from FTM module
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The contact persons from FTM to discuss issues: Richard Staley, r.j.staley@bham.ac.uk
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The eFEX/jFEX Tester Module (FTM) must be capable of running high-speed links with bit rates up
to at least 9.6 Gbps with parts specified for operation up to 12.8 Gbps.
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The FTM provides two connectors with 48 fibers each of transmitters, and one connector with 24
receivers.
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The FOX demonstrator will provide one 48-fiber MTP male input connector for the FTM.
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2.1.3. Input from LAr (LDPS)
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The contact persons from Lar to discuss issues:
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The trigger information from the entire LAr calorimeter to the three FEX systems will be sent by the
LAr Digital Processor System (LDPS). The LDPS is a set of about 30 ATCA modules called LAr
Digital Processor Blades (LDPBs) housed in three ATCA shelves (crates).
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Each LDPB acts as a carrier board for four mezzanine cards (AMCs) each of which has a single FPGA
with 48 output optical fibres providing data to the FEXes over 48-fiber MTP connector. One of these
fibres will contain gTower information, 4 to 8 will contain trigger tower information, 24 to 32 fibres
will contain super cell information, and the rest are spares.
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The FOX demonstrator will provide one 48-fiber MTP male input connector for the LDPS.
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2.1.4. Input from Tile (TREX)
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The contact persons from TREX to discuss issues:
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The Tile calorimeter data will be sent to the FOX demonstrator from the existing L1Calo PreProcessor modules (PPMs) via new rear transition cards - the TREX board.
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The FOX demonstrator will provide one 48-fiber MTP male input connector for the TREX.
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2.2. OUTPUTS FROM THE DEMONSTRATOR
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The FOX demonstrator will provide a set of MTP feedthroughs for different output connectors for
several possible data destinations to the L1Calo modules.
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2.2.1. Outputs to CMX and FTM
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The FOX demonstrator will provide output connectors to the CMX and the FTM modules in order to
test the demonstrator with 6.4 Gbps and 9.6 Gbps before getting access to the other modules.
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The FOX demonstrator will provide one 24-fiber MTP male output connector to the FTM module and
one 12-fiber MTP male output connector to the CMX module.
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2.2.2. Output to eFEX module
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The contact persons from L1Calo to discuss issues: Weiming Qian, Weiming.Qian@cern.ch
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Each eFEX module receives three cables of four ribbons with 12 fibres, i.e. the eFEX has three 48fiber MTP eFEX input connectors.
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The FOX demonstrator will provide one 48-fiber MTP male output connector to the eFEX.
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2.2.3. Output to jFEX module
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The contact persons from L1Calo to discuss issues: Ulrich Schäfer, uschaefe@uni-mainz.de
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Each jFEX module receives four cables of six ribbons with 12 fibres, i.e. the jFEX has four 72-fiber
MTP input connectors.
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The FOX demonstrator will provide one 72-fiber MTP male output connector to the jFEX.
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2.2.4. Output to gFEX module
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The contact persons from L1Calo to discuss issues: Michael Begel, michael.begel@cern.ch
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The gFEX module receives four cables of six ribbons with 12 fibres, i.e. the gFEX has four 72-fiber
MTP input connectors.
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The FOX demonstrator will provide one 72-fiber MTP male output connector to the gFEX.
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2.3. DEMONSTRATOR PARTITIONING AND HOUSING
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2.3.1. Demonstrator partitioning
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Follow the initial proposal for the FOX demonstrator (Figure 1) and the initial idea of the FOX
partitioning (Figure 2), the demonstrator will be implemented in two logical/physical parts:
 First part will represent the LArFox and TileFox in Figure 2.
 Second part will represent eFox, jFox and gFox in Figure 2.
Mechanically they are implemented in separate boxes. The optical milti-fiber trunk cables connect the
boxes to other parts of the L1Calo test setup in the integration tests; the 48-fiber trunk cable also
connects the two boxes.
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Inside the boxes, internal optical assemblies (fan-out cables, LC connector couplers, passive splitters,
trunk cables) provides mapping/splitting/distribution of the optical signals from the input connectors to
the output optical connectors.
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First part - LArFox / TileFox demonstrator
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For the final design this part may be implemented using a custom build commercial mapping module,
which redistributes the input signals to output connectors, as described in 3.2.4 of the FOX Project
Specification [1] or by connecting fibres by fusion splicing , as described in 3.2.3 of [1] .
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For the FOX demonstrator this part will initially implement mapping by LC connectors, as described
in 3.2.2 of [1] and at the later stage may be implemented by fusion splicing upon availability of the
fusion-splicing machine. Input to output connection by male-male trunk cable will be also possible - to
“emulate” a possible custom build mapping module assembly with defined input-output connections.
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The LArFox / TileFox demonstrator part will have 2 MTP feed-troughs for two possible input male
connectors out of four, described in 2.1 and 1 MTP output feed-trough. Figure 8 shows four possible
input “logical” connections to two physical MTP feed-troughs.
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Internal mapping of the input-output fibres will be provided by the MTP fan-out split cables – male
MTP to male LC connectors – or by trunk cable without mapping.
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Figure 8: LArFox / TileFox part for the FOX demonstrator – possible “logical” inputs.
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Second part - eFox/jFox/gFox demonstrator
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For the FOX demonstrator as for the final design the eFox/jFox/gFox part will provide both - fibre
mapping and splitting:
 Internal mapping of the input-output fibres will be provided by the MTP fan-out split cables –
male MTP to male LC connectors – or by trunk cable without mapping.
 For the data path, which require passive splitting, we will use the connectorized passive splitters
with the LC connectors on both end, as described in 3.3 of [1] . It will be inserted in-situ upon
need. We would also like to have 3 passive splitters, connected directly to the 48-fiber MTP input
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male connector with LC connectors on output fibers. The input fan-out cable therefore will be 48
MTP(M) – 45 LC(F) + 3 splitters, connected directly to the MTP (first three fibers from the end,
on the second row), on the other side of the splitters – 2 LC(F).
On the input side, the eFox/jFox/gFox part will have one feed-trough for one MTP input male
connector and on the output side - two feed-troughs for MTP output male connectors. Figure 9 shows
four possible output “logical” connections to two physical MTP feed-troughs.
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Figure 9: eFox/jFox/gFox part for the FOX demonstrator – possible “logical” outputs.
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2.3.2. Demonstrator housing
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For the integration tests with other components of the L1Calo, the FOX demonstrator will be mounted
in existing 19-inch rack infrastructure in USA15 in a 1U (or 2U) rack mounted box(s). The housing
will provide the MTP feed-through for the patch cables connections. The current proposal is to split
the FOX demonstrator into two separate parts and therefore have two separate 1U (2U) boxes:
 First box: with feed-troughs for 2 input connectors and 1 output connector on the front panel, as
described in 2.3.1 and shown on Figure 8.
 Second box: with feed-troughs for 1 input connectors and 2 output connectors on the front panel,
as described in 2.3.1.
The boxes will provide the access to internal connections.
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Mechanically, the FOX demonstrator is implemented as two almost identical boxes – 2U rack
mounted (see Figure 10), LArFOX & TileFOX Demo box and jFox & gFox Demo box. The difference
between boxes is in the number of internal LC-LC adapters, located on the adapter port.
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Figure 10: FOX Demo boxes.
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The outer housing can be fixed in the rack and inner mapping box moved in and out. On the front
panel of the mapping box, there are 3 MTP feed-through for the patch cables connections:
 First box: the LArFOX & TileFOX Demo box with feed-troughs for 2 input and 1 output
connectors, and 48 LC adapters port inside,
 Second box: the jFox & gFox Demo box with feed-troughs for 1 input and 2 output connectors
and 52 LC adapters port inside.
Sylex SYLEX, s.r.o., Bratislava, Slovak Republic, built the FOX demonstrator.
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2.3.3. Feed-through
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The Figure 11 below shows an example of the feed-trough:
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Figure 11: Individual adapter compatible with all MTP connectors.
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Mechanically, the MTP feedthroughs are identical for all fibers count in the MTPs (from 12 to 72).
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The following convention applies to the optical connectors:
 All optical connectors on the FOX demonstrator boxes – connectors on the internal fan-out or
trunk cables, connected to the front panel feedthroughs from inside the boxes - are MALE,
 All optical connectors on the trunk cables from other equipment, connected to the front panel
feedthroughs from outside, are FEMALE.
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2.4. OPTICAL CABLES AND SPLITTERS
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2.4.1. Trunk cables to/from FOX demonstrator
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Initial assumptions during the FOX Demo design is:
 There will be not more than 1 input to the FOX demonstrator at the same time,
 There will be not more than 1 output to the FOX demonstrator at the same time,
 The connection between to parts of the FOX demonstrator will be 48-fibers trunk cable.
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Trunk cables with female MTP connectors to connect input systems:
 12-fibers trunk cable to connect the CMX output,
 48-fibers trunk cable to connect the FTM, the LDPS, or the TREX output.
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Trunk cables with female MTP connectors to connect output systems: FTM, the LDPS, or the TREX
output
 12-fibers trunk cable to connect the CMX input,
 24-fibers trunk cable to connect the FTM input,
 48-fibers trunk cable to connect the eFEX input.
 72-fibers trunk cable to connect the jFEX or the gFEX input.
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The 48-fibers trunk cable with female MTP connectors connects FOX demonstrator boxes. Therefore,
the minimum number of cables to connect the FOX demonstrator to the outside systems:
 2 x 12-fibers trunk cables for the CMX output and input,
 1 x 24-fibers trunk cable for the FTM input,
 3 x 48-fibers trunk cables for the FTM, LDPS, or TREX output, between boxes and eFEX input,
 1 x 72-fibers trunk cable for the jFEX or gFEX input.
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The Error! Reference source not found. below shows the minimum number trunk cables with
female MTP connectors needed to connect the FOX demonstrator to outside systems and the number
of available cables (the assumption is that the trunk cable between the boxes is always 48-fiber):
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N fibres
N cables
needed
N cables
available
Length
available
System to connect
12
2
4
2x2m + 2x?m
CMX output and input
24
1
1
2m
FTM input
48
3
4
2x1m + 2x2m
LDPS/TREX, between boxes, eFEX
72
1
2
1m
jFEX/gFEX
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Table 1: Trunk cables.
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2.4.2. Fan-out cables
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The FOX demonstrator will map each of the fibre on an input MTP connector to a fibre on an output
MTP connector. The input and output parallel fibre ribbons break out in individual fibres with LC
connectors – the MTP fan-out split cables. Connecting two segments of optical fibres may be done
through optical LC connectors on the end of the fibres and a connector coupler. Incoming and ongoing
trunk cables of different fiber counts are connected to the corresponding fan-out cables inside the
boxes, as presented in the Figure 8 and Figure 9. The Figure 12 shows different fan-out cables:
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Figure 12: Different fan-out cables - 12-, 24-, 48- and 72-fibers.
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Possible mapping scenarios, described in 2.5, defined the required number of fan-out cables. The
Table 2 below shows the minimum number fun-out cables (with the male MTP connector on one side
and the individual LC connectors on the other side) to implement different mapping scenarios and the
number of available cables:
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N fibres
N cables
needed
N cables
available
Length
available
System to connect
12
2
2
0.5m
CMX output and input
24
1
1
0.5m
FTM input
48
4
7
2x1m + 5x0.5m
LDPS/TREX, between boxes, eFEX
72
1
3
2x1m + 1x0.5m
jFEX/gFEX
Table 2: Fan-out cables.
NB: The assumption is that the trunk cable between the boxes is always 48-fiber.
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2.4.3. Passive splitters
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For the fibres that go to two destinations and therefore require splitting, a passive optical splitter with
the even split ration (50/50) can be used. The splitter may be connected to the input/output fibres by
LC connectors or by fusion splicing.
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In the data path, which may require data duplication to two data destinations, the connectorized
passive splitter may be inserted inside the box (see Figure 13). The passive splitter from SENKO has
even split ratio 50/50 and the LC connectors on both ends of 0.5m pigtails. 3 splitters are available.
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Figure 13: Passive splitter.
There is also the 48-fibers fan-out cable (Figure 14) with 3 passive splitters (inside the silver barrel),
connected directly to 3 fibers in the 48-fiber MTP input male connector:
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Figure 14: 48-fiber fan-out cable with three passive splitters.
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The 45 “direct” fibers from the MTP connector are terminated with the LC connectors with AQUA
color housings.
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The three fibers, connected to the passive splitters, are from the second row of the 48-fibers MTP
connector – positions 22, 23 and 24. The six LC connectors on the fibers after the splitters have
BEIGE color housings.
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Connectors terminated to the first row of the 48F-fiber MTP (positions 1-12) are with AQUA clip.
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Connectors terminated to the second row (positions 13-21) are with MAGENTA clip (position 22, 23,
24 are with the splitter). The position 22 is marked on the LC side with a marking sleeve Nr.1 (LC clip
AQUA), position 23 - marking sleeve Nr.2 ( LC clip MAGENTA); position 24 - marking sleeve Nr.3 (
LC clip BLACK).
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Connectors terminated to the third row (positions 25-36) are with BEIGE clip.
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Connectors terminated to the fourth row (positions 37-48) are with BLUE clip.
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The Figure 15shows the passive splitter with bare fibers:
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Figure 15: Passive splitter with bare fibers.
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A possible layout of the fan-out cables inside the box may looks like on the Figure 16 below:
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Figure 16: “Simulation” of the fan-outs inside the box.
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2.5. POSSIBLE MAPPING SCENARIOS
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For the integration tests of the FOX demonstrator, the LAr and TREX teams in agreement with the
eFEX, jFEX and gFEX teams shall provide for every fibre in their input connector a possible
destination in the output connectors:
Input Connector Fibre №
Destination(s) (eFEX, jFEX, gFEX, spare)
Output Connector Fibre №
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Write down which fibres in each group of 12 are unused.
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The FOX demonstrator allows different mapping scenarios according to the test needs. While not all
possible combinations may be implemented, the most probable were considered during the
demonstrator design and implementation. The mapping scenario specify:
 The input to the first box (LArFOX & TileFOX) – multi-fiber trunk cable(s),
 Possible mappings in the first box:
o input and output fan-out cables with LC connectors and couples between,
o as above with passive splitting,
o trunk cable from input to output – “emulation” of custom mapping,
 Trunk cable between the boxes.
 Possible mappings in the second box (jFox & gFox) – see above for the first box,
 The output from the second box – multi-fiber trunk cable(s),
As an example, the scenario may looks like (see also the table entry example below in Table 3):
 The input to the first box (LArFOX & TileFOX) – 48-fiber trunk cable (In),
 Possible mappings in the first box: input and output 48-fiber fan-out cables,
 48-fiber trunk cable between the boxes (Between).
 Possible mappings in the second box (jFox & gFox): input and output 48-fiber fan-out cables,
 The output from the second box – 48-fiber trunk cable (Out).
In
LArFOX & TileFOX
Between
jFox & gFox
Out
48
48 + 48 fan-outs
48
48 + 48 fan-outs
48
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Table 3: Entry example.
The Table 4 below lists several possible mapping scenarios (without splitters):
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N
In
LArFOX & TileFOX
Between
jFox & gFox
Out
System
1
12 (2m)
12 + 48 fan-outs
48
48 + 12 fan-outs
12 (2m)
CMX
2
24 (2m)
24 + 48 fan-outs
48
48 + 24 fan-outs
24 (2m)
FTM
3
48
48 trunk
48
48 trunk
48
eFEX
4
48
48 trunk
48
48 + 48 fan-outs
48
eFEX
5
48
48 + 48 fan-outs
48
48 + 48 fan-outs
48
eFEX
6
48
48 trunk
48
48 + 72 fan-outs
72
gFEX
7
48
48 + 48 fan-outs
48
48 + 72 fan-outs
72
gFEX
8
48
48 + 72 fan-outs
72
72 trunk
72
gFEX
9
48+48
2x48 + 72 fan-outs
72
72 +72 fan-outs
72
gFEX
Table 4: Possible mapping scenarios without splitters.
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2.5.1. Tests with CMX and FTM
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Scenarios 1 and 2 present possible tests of the FOX demonstrator with the CMX or the FTM. The
trunk cable connects FOX demonstrator input and output to the module (CMX or FTM). Fan-out
cables inside the boxes provides fiber mapping.
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It is also possible for the CMX to use only one box with 12-fibers fan-out cables at the input and the
output and 12-fibers trunk cables to the CMX input and output.
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2.5.2. Tests with eFEX
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Scenario 3: no fan-out cables inside the boxes. This is an “emulation” of the custom-built well-defined
(and final) mapping. No easy mapping changes, however…
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Scenario 4: a combination of the custom and configurable mapping.
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Scenario 5: all configurable mapping.
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In scenarios 4 and 5 to test data duplication (data transmission via splitters) either the connectorised
passive splitters (Figure 13) or the 48-fibers fan-out cable (Figure 14) with 3 passive splitters can be
added.
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2.5.3. Tests with gFEX
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Scenarios 6 to 9 present possible tests of the FOX demonstrator with the gFEX.
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As there is no any source with the 72-fiber output, the scenario, similar to (4) for eFEX cann’t be
tested.
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Scenarios 6 and 8: a combination of the custom and configurable mapping.
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Scenario 7: all configurable mapping.
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Scenario 9: a possibility to feed all 72 inputs of the gFEX in a case 2 48-fiber outputs from the LAr are
available
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2.6. TOOLS
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For the integration tests of the FOX demonstrator, several tools were acquired, namely:
 LC connectors cleaning set,
 Optical power meter Fluke FTK-1000,
 Fujikura FSM-70S splice machine and Fujikura CT-30 cleaving tool.
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2.6.1. LC cleaning set
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The Figure 17 shows the LC connectors cleaning set.
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Figure 17: LC connectors cleaning set.
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2.6.2. optical power meter fluke networks FTK-1000
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The Figure 18 shows the Fluke Networks FTK1000 SimpliFiber Pro Multimode Fiber Verification
Kit, Fiber Tester (ordered from DISTRELEC) and Simplex Reference Cord Set (from FARNELL):
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Figure 18: Fluke FTK-1000 and reference set.
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APPENDIX A. MEASUREMENTS AND TESTS
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APPENDIX A.A. MINIPOD LIGHT LEVEL MONITORING WITH CMX
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Initial study is done with the CMX based test setup in the L1Calo test rig.
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The CMX SN01 (in slot 03) has 2 Transmitters (MiniPODs MP1, MP2), connected to the “BASE”
FPGA and 3 Receivers (MiniPODs MP3, MP4, MP5), connected to the “TOPO” FPGA. The CMX
module is based on the Virtex 6 FPGAs and can only test a transmission speed up of 6.4 Gbps.
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The firmware in these 2 FPGAs consists of Integrated Bit Error Ratio Tester (IBERT) core design
from XILINX. Interaction with the IBERT is done by using ChipScope™ Pro Analyzer. Design was
provided by W. Fedorko.
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A cmxDiagnostics program, written by A. Chegwidden, allows reading transmitters light output and
receivers light input in µW and dBm.
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The 12-fifres trunk cable connects MiniPODs MP2 and MP3. First measurement is shown below:
***********************************************
MiniPod 2 Internal Monitors (CMX0)
Thu Jan 1 01:00:00 1970
***********************************************
Channel 0 TX Light Output [µW (dBm)]: 1030.8 (0.132)
Channel 1 TX Light Output [µW (dBm)]: 1044.9 (0.191)
Channel 2 TX Light Output [µW (dBm)]: 1005.9 (0.026)
Channel 3 TX Light Output [µW (dBm)]: 920.5 (-0.360)
Channel 4 TX Light Output [µW (dBm)]: 1067.5 (0.284)
Channel 5 TX Light Output [µW (dBm)]: 1008.6 (0.037)
Channel 6 TX Light Output [µW (dBm)]: 1068.2 (0.287)
Channel 7 TX Light Output [µW (dBm)]: 1047.9 (0.203)
Channel 8 TX Light Output [µW (dBm)]: 1140.9 (0.572)
Channel 9 TX Light Output [µW (dBm)]: 1096.9 (0.402)
Channel 10 TX Light Output [µW (dBm)]: 1073.8 (0.309)
Channel 11 TX Light Output [µW (dBm)]: 1048.7 (0.207)
***********************************************
MiniPod 3 Internal Monitors (CMX0)
Thu Jan 1 01:00:00 1970
***********************************************
Channel 0 RX Light Input [µW (dBm)]: 799.1 (-0.974)
Channel 1 RX Light Input [µW (dBm)]: 980.0 (-0.088)
Channel 2 RX Light Input [µW (dBm)]: 943.8 (-0.251)
Channel 3 RX Light Input [µW (dBm)]: 936.0 (-0.287)
Channel 4 RX Light Input [µW (dBm)]: 841.0 (-0.752)
Channel 5 RX Light Input [µW (dBm)]: 1000.0 (0.000)
Channel 6 RX Light Input [µW (dBm)]: 950.0 (-0.223)
Channel 7 RX Light Input [µW (dBm)]: 967.7 (-0.143)
Channel 8 RX Light Input [µW (dBm)]: 956.3 (-0.194)
Channel 9 RX Light Input [µW (dBm)]: 915.4 (-0.384)
Channel 10 RX Light Input [µW (dBm)]: 953.4 (-0.207)
Channel 11 RX Light Input [µW (dBm)]: 1017.3 (0.074)
These measurements can be translated to light loss, e.g., for the channel 0:
0.132 + (1-0.974) = 0.352 dBm –> 2 connectors, ~0.18 dBm/connector (12-fibre MPT)
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