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BS EN IEC 61280-4-5:2020 Fibre-optic communication subsystem test procedures - Installed cabling plant. Attenuation measurement of MPO terminated fibre optic cabling plant using test equipment with MPO interfaces, 2020
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- CONTENTS
- FOREWORD
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, graphical symbols and abbreviated terms [Go to Page]
- 3.1 Terms and definitions
- 3.2 Graphical symbols
- Figures [Go to Page]
- Figure 1 – Connector and apparatus symbols
- 3.3 Abbreviated terms
- 4 Test methods [Go to Page]
- 4.1 General
- Figure 2 – Symbol for cabling under test
- 4.2 Cabling configurations and applicable test methods
- 5 Overview of uncertainties [Go to Page]
- 5.1 General
- 5.2 Sources of significant uncertainties
- Tables [Go to Page]
- Table 1 – Cabling configurations
- Table 2 – Test methods and configurations
- 5.3 Consideration of the PM
- 5.4 Consideration of test cord connector grade
- 5.5 Typical uncertainty values for multimode testing
- Table 3 – Measurements bias related to test cord connector grade
- Table 4 – Uncertainty for a given attenuation at 850 nm using same photodetector
- 5.6 Typical uncertainty values for single-mode testing
- Table 5 – Uncertainty for a given attenuation at 850 nm using different photodetectors
- Table 6 – Uncertainty for a given attenuation at 1 310 nm using same photodetector
- 6 Apparatus [Go to Page]
- 6.1 General
- 6.2 Light source [Go to Page]
- 6.2.1 General
- 6.2.2 Stability
- Table 7 – Uncertainty for a given attenuation at 1 310 nm using different photodetectors [Go to Page]
- 6.2.3 Spectral characteristics (LSPM measurement)
- 6.3 Launch cord
- Table 8 – Spectral requirements
- 6.4 Receive or tail cord
- 6.5 Substitution cord
- 6.6 Adapter cord
- 6.7 Power meter – LSPM methods only
- 6.8 OTDR apparatus
- 6.9 Connector end face cleaning and inspection equipment
- 6.10 Adapters
- 7 Procedures [Go to Page]
- 7.1 General
- Figure 3 – OTDR schematic with external optical switch
- 7.2 Common procedures [Go to Page]
- 7.2.1 Care of the test cords
- 7.2.2 Take reference measurements
- 7.2.3 Inspect and clean the ends of the optical fibres in the cabling
- 7.2.4 Take the measurements
- 7.2.5 Make the calculations
- 7.2.6 Multi-fibre and bi-directional testing
- 7.3 Calibration
- 7.4 Safety
- 8 Calculations
- 9 Documentation [Go to Page]
- 9.1 Information for each test
- 9.2 Information to be available
- Annex A (normative)One-cord method [Go to Page]
- A.1 Applicability of the test method
- A.2 Apparatus
- A.3 Procedure for unpinned to unpinned cabling with unpinned power meter
- A.4 Procedure for unpinned to pinned cabling with unpinned power meter
- Figure A.1 – Reference measurement for unpinnedto unpinned cabling using unpinned power meter
- Figure A.2 – Test measurement for unpinnedto unpinned cabling using unpinned power meter
- A.5 Procedure for pinned to pinned cabling with pinned power meter
- Figure A.3 – Reference measurement for unpinnedto pinned cabling using unpinned power meter
- Figure A.4 – Test measurement for unpinnedto pinned cabling using unpinned power meter
- A.6 Procedure for unpinned to unpinned cabling with pinned power meter and gender-neutral test cord
- Figure A.5 – Reference measurement for pinnedto pinned cabling using pinned power meter
- Figure A.6 – Test measurement for pinned to pinned cabling using pinned power meter
- A.7 Calculation
- A.8 Components of reported attenuation
- Figure A.7 – Reference measurement for unpinnedto unpinned cabling using pinned power meter
- Figure A.8 – Test measurement for unpinned to unpinned cabling(gender-neutral TC1) using pinned power meter
- Annex B (normative)Three-cord method [Go to Page]
- B.1 Applicability of the test method
- B.2 Apparatus
- B.3 Procedure for unpinned to unpinned cabling
- B.4 Procedure for unpinned to pinned cabling
- Figure B.1 – Reference measurement for unpinnedto unpinned cabling using pinned power meter
- Figure B.2 – Test measurement for unpinnedto unpinned cabling using pinned power meter
- B.5 Procedure for pinned to pinned cabling
- Figure B.3 – Reference measurement for unpinnedto pinned cabling using pinned power meter
- Figure B.4 – Test measurement for unpinnedto pinned cabling using pinned power meter
- B.6 Procedure, channel test (general)
- Figure B.5 – Reference measurement for pinnedto pinned cabling using unpinned power meter
- Figure B.6 – Test measurement for pinned to pinned cablingusing unpinned power meter
- B.7 Calculations
- B.8 Components of reported attenuation
- Figure B.7 – Reference measurement for channel test using unpinned power meter
- Figure B.8 – Test measurement for channel test using unpinned power meter
- Annex C (normative)Adapter-cord method [Go to Page]
- C.1 Applicability of the test method
- C.2 Apparatus
- C.3 Procedure for unpinned to unpinned cabling with pinned power meter
- C.4 Procedure for unpinned to pinned cabling with pinned power meter
- Figure C.1 – Reference measurement for unpinnedto unpinned cabling using pinned power meter
- Figure C.2 – Test measurement for unpinned to unpinnedcabling using pinned power meter
- C.5 Procedure for pinned to unpinned cabling with unpinned power meter
- Figure C.3 – Reference measurement for unpinnedto pinned cabling using pinned power meter
- Figure C.4 – Test measurement for unpinnedto pinned cabling using pinned power meter
- C.6 Procedure for pinned to pinned cabling with unpinned power meter
- Figure C.5 – Reference measurement for unpinnedto pinned cabling using unpinned power meter
- Figure C.6 – Test measurement for unpinnedto pinned cabling using unpinned power meter
- C.7 Calculations
- Figure C.7 – Reference measurement for unpinnedto pinned cabling using unpinned power meter
- Figure C.8 – Test measurement for unpinnedto pinned cabling using unpinned power meter
- C.8 Components of reported attenuation
- Annex D (normative)Equipment cord method [Go to Page]
- D.1 Applicability of the test method
- D.2 Apparatus
- D.3 Procedure
- D.4 Calculation
- D.5 Components of reported attenuation
- Figure D.1 – Reference measurement using pinned power meter
- Figure D.2 – Test measurement using pinned power meter
- D.6 Typical uncertainty values
- Table D.1 – Uncertainty for a given attenuation when equipment cord method is used
- Annex E (normative)Optical time domain reflectometer [Go to Page]
- E.1 Applicability of the test method
- E.2 Apparatus [Go to Page]
- E.2.1 General
- E.2.2 OTDR
- E.2.3 Test cords
- E.3 Procedure (test method)
- E.4 Calculation [Go to Page]
- E.4.1 General
- E.4.2 Connection location
- Figure E.1 – OTDR method [Go to Page]
- E.4.3 Definition of the power levels F1 and F2
- Figure E.2 – Location of the ports of the cabling under test [Go to Page]
- E.4.4 Alternative calculation
- Figure E.3 – Graphic construction of F1 and F2
- Figure E.4 – Graphic construction of F1, F11, F12 and F2
- E.5 OTDR uncertainties
- Annex F (normative)Requirements for the multimode source characteristics
- Annex G (informative)OTDR configuration information [Go to Page]
- G.1 General
- G.2 Other measurement configurations [Go to Page]
- G.2.1 General
- G.2.2 Measurement with low return loss connectors or short length cabling
- Figure G.1 – Attenuation measurement with low return loss connectors [Go to Page]
- G.2.3 Measurement with APC connectors
- Figure G.2 – Attenuation measurement of a short length cabling
- Figure G.3 – Attenuation measurement with APC MPO connections
- Annex H (informative)Test cord, breakout cord, and cassette attenuation verification [Go to Page]
- H.1 General
- H.2 Apparatus
- H.3 General procedure [Go to Page]
- H.3.1 Overview
- H.3.2 Test cord verification
- Figure H.1 – Obtaining reference power level P1
- Figure H.2 – Obtaining power level P2 [Go to Page]
- H.3.3 Cassette and breakout cord verification
- Figure H.3 – Obtaining reference power level P1
- Figure H.4 – Obtaining power level P2
- H.4 Test cord verification prior to cabling measurement [Go to Page]
- H.4.1 General
- H.4.2 Procedure for unpinned to unpinned cabling measurement
- Figure H.5 – Test measurement for unpinned to unpinned cabling
- Figure H.6 – Step 1: obtaining reference power level P1 [Go to Page]
- H.4.3 Procedure for unpinned to pinned cabling measurement
- Figure H.7 – Step 2: verification cords, obtaining power level P2
- Figure H.8 – Test measurement for unpinned to pinned cabling [Go to Page]
- H.4.4 Procedure for pinned to pinned cabling measurement
- Figure H.9 – Step 1: obtaining reference power level P1
- Figure H.10 – Step 2: obtaining power level P2
- Figure H.11 – Test measurement for pinned to pinned cabling
- Figure H.12 – Step 1: obtaining reference power level P1
- Figure H.13 – Step 2: verification of cords, obtaining power level P2
- Figure H.14 – Step 3: verification of receive cord, obtaining power level P3
- Annex I (normative)On the use of low attenuation grade test cords [Go to Page]
- I.1 General
- I.2 Practical configurations and assumptions [Go to Page]
- I.2.1 Component specifications
- I.2.2 Conventions
- I.2.3 Reference planes
- I.3 Impact of using low attenuation grade test cords for recommended LSPM methods
- I.4 Examples for LSPM measurements [Go to Page]
- I.4.1 Example 1: Configuration Au-u, 1-C method (Annex A)
- Table I.1 – Measurement bias adjustment when using low attenuation grade test cords [Go to Page]
- I.4.2 Example 2: Configuration Du-u, EC method (Annex D)
- I.5 Impact of using reference grade test cords for different configurations using the OTDR test method [Go to Page]
- I.5.1 Cabling configurations Au-u, Ap-u and Ap-p
- I.5.2 Cabling configuration Du-u
- Figure I.1 – Cabling configurations Au-u, Ap-u and Ap-p tested with OTDR method
- Table I.2 – Acceptance figure adjustment using low attenuation grade test cords – OTDR method
- Figure I.2 – Cabling configuration Du-u tested with OTDR method
- Bibliography [Go to Page]