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BS EN IEC 61280-4-5:2020

BS EN IEC 61280-4-5:2020

$215.11

Fibre-optic communication subsystem test procedures – Installed cabling plant. Attenuation measurement of MPO terminated fibre optic cabling plant using test equipment with MPO interfaces

Published By Publication Date Number of Pages
BSI 2020 80
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PDF Catalog

PDF Pages PDF Title
2 undefined
7 CONTENTS
12 FOREWORD
14 1 Scope
2 Normative references
15 3 Terms, definitions, graphical symbols and abbreviated terms
3.1 Terms and definitions
17 3.2 Graphical symbols
18 Figures
Figure 1 โ€“ Connector and apparatus symbols
19 3.3 Abbreviated terms
4 Test methods
4.1 General
Figure 2 โ€“ Symbol for cabling under test
20 4.2 Cabling configurations and applicable test methods
21 5 Overview of uncertainties
5.1 General
5.2 Sources of significant uncertainties
Tables
Table 1 โ€“ Cabling configurations
Table 2 โ€“ Test methods and configurations
22 5.3 Consideration of the PM
5.4 Consideration of test cord connector grade
5.5 Typical uncertainty values for multimode testing
Table 3 โ€“ Measurements bias related to test cord connector grade
23 Table 4 โ€“ Uncertainty for a given attenuation at 850 nm using same photodetector
24 5.6 Typical uncertainty values for single-mode testing
Table 5 โ€“ Uncertainty for a given attenuation at 850 nm using different photodetectors
Table 6 โ€“ Uncertainty for a given attenuation at 1 310 nm using same photodetector
25 6 Apparatus
6.1 General
6.2 Light source
6.2.1 General
6.2.2 Stability
Table 7 โ€“ Uncertainty for a given attenuation at 1 310 nm using different photodetectors
26 6.2.3 Spectral characteristics (LSPM measurement)
6.3 Launch cord
Table 8 โ€“ Spectral requirements
27 6.4 Receive or tail cord
6.5 Substitution cord
28 6.6 Adapter cord
6.7 Power meter โ€“ LSPM methods only
29 6.8 OTDR apparatus
6.9 Connector end face cleaning and inspection equipment
6.10 Adapters
7 Procedures
7.1 General
Figure 3 โ€“ OTDR schematic with external optical switch
30 7.2 Common procedures
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
31 7.3 Calibration
7.4 Safety
8 Calculations
9 Documentation
9.1 Information for each test
9.2 Information to be available
32 Annex A (normative)One-cord method
A.1 Applicability of the test method
A.2 Apparatus
A.3 Procedure for unpinned to unpinned cabling with unpinned power meter
33 A.4 Procedure for unpinned to pinned cabling with unpinned power meter
Figure A.1 โ€“ Reference measurement for unpinnedto unpinned cabling using unpinned power meter
Figure A.2 โ€“ Test measurement for unpinnedto unpinned cabling using unpinned power meter
34 A.5 Procedure for pinned to pinned cabling with pinned power meter
Figure A.3 โ€“ Reference measurement for unpinnedto pinned cabling using unpinned power meter
Figure A.4 โ€“ Test measurement for unpinnedto pinned cabling using unpinned power meter
35 A.6 Procedure for unpinned to unpinned cabling with pinned power meter and gender-neutral test cord
Figure A.5 โ€“ Reference measurement for pinnedto pinned cabling using pinned power meter
Figure A.6 โ€“ Test measurement for pinned to pinned cabling using pinned power meter
36 A.7 Calculation
A.8 Components of reported attenuation
Figure A.7 โ€“ Reference measurement for unpinnedto unpinned cabling using pinned power meter
Figure A.8 โ€“ Test measurement for unpinned to unpinned cabling(gender-neutral TC1) using pinned power meter
37 Annex B (normative)Three-cord method
B.1 Applicability of the test method
B.2 Apparatus
B.3 Procedure for unpinned to unpinned cabling
38 B.4 Procedure for unpinned to pinned cabling
Figure B.1 โ€“ Reference measurement for unpinnedto unpinned cabling using pinned power meter
Figure B.2 โ€“ Test measurement for unpinnedto unpinned cabling using pinned power meter
39 B.5 Procedure for pinned to pinned cabling
Figure B.3 โ€“ Reference measurement for unpinnedto pinned cabling using pinned power meter
Figure B.4 โ€“ Test measurement for unpinnedto pinned cabling using pinned power meter
40 B.6 Procedure, channel test (general)
Figure B.5 โ€“ Reference measurement for pinnedto pinned cabling using unpinned power meter
Figure B.6 โ€“ Test measurement for pinned to pinned cablingusing unpinned power meter
41 B.7 Calculations
B.8 Components of reported attenuation
Figure B.7 โ€“ Reference measurement for channel test using unpinned power meter
Figure B.8 โ€“ Test measurement for channel test using unpinned power meter
42 Annex C (normative)Adapter-cord method
C.1 Applicability of the test method
C.2 Apparatus
C.3 Procedure for unpinned to unpinned cabling with pinned power meter
43 C.4 Procedure for unpinned to pinned cabling with pinned power meter
Figure C.1 โ€“ Reference measurement for unpinnedto unpinned cabling using pinned power meter
Figure C.2 โ€“ Test measurement for unpinned to unpinnedcabling using pinned power meter
44 C.5 Procedure for pinned to unpinned cabling with unpinned power meter
Figure C.3 โ€“ Reference measurement for unpinnedto pinned cabling using pinned power meter
Figure C.4 โ€“ Test measurement for unpinnedto pinned cabling using pinned power meter
45 C.6 Procedure for pinned to pinned cabling with unpinned power meter
Figure C.5 โ€“ Reference measurement for unpinnedto pinned cabling using unpinned power meter
Figure C.6 โ€“ Test measurement for unpinnedto pinned cabling using unpinned power meter
46 C.7 Calculations
Figure C.7 โ€“ Reference measurement for unpinnedto pinned cabling using unpinned power meter
Figure C.8 โ€“ Test measurement for unpinnedto pinned cabling using unpinned power meter
47 C.8 Components of reported attenuation
48 Annex D (normative)Equipment cord method
D.1 Applicability of the test method
D.2 Apparatus
D.3 Procedure
49 D.4 Calculation
D.5 Components of reported attenuation
Figure D.1 โ€“ Reference measurement using pinned power meter
Figure D.2 โ€“ Test measurement using pinned power meter
50 D.6 Typical uncertainty values
Table D.1 โ€“ Uncertainty for a given attenuation when equipment cord method is used
51 Annex E (normative)Optical time domain reflectometer
E.1 Applicability of the test method
E.2 Apparatus
E.2.1 General
E.2.2 OTDR
52 E.2.3 Test cords
E.3 Procedure (test method)
53 E.4 Calculation
E.4.1 General
E.4.2 Connection location
Figure E.1 โ€“ OTDR method
54 E.4.3 Definition of the power levels F1 and F2
Figure E.2 โ€“ Location of the ports of the cabling under test
55 E.4.4 Alternative calculation
Figure E.3 โ€“ Graphic construction of F1 and F2
56 Figure E.4 โ€“ Graphic construction of F1, F11, F12 and F2
57 E.5 OTDR uncertainties
58 Annex F (normative)Requirements for the multimode source characteristics
59 Annex G (informative)OTDR configuration information
G.1 General
G.2 Other measurement configurations
G.2.1 General
G.2.2 Measurement with low return loss connectors or short length cabling
60 Figure G.1 โ€“ Attenuation measurement with low return loss connectors
61 G.2.3 Measurement with APC connectors
Figure G.2 โ€“ Attenuation measurement of a short length cabling
62 Figure G.3 โ€“ Attenuation measurement with APC MPO connections
63 Annex H (informative)Test cord, breakout cord, and cassette attenuation verification
H.1 General
H.2 Apparatus
H.3 General procedure
H.3.1 Overview
64 H.3.2 Test cord verification
Figure H.1 โ€“ Obtaining reference power level P1
Figure H.2 โ€“ Obtaining power level P2
65 H.3.3 Cassette and breakout cord verification
Figure H.3 โ€“ Obtaining reference power level P1
Figure H.4 โ€“ Obtaining power level P2
66 H.4 Test cord verification prior to cabling measurement
H.4.1 General
H.4.2 Procedure for unpinned to unpinned cabling measurement
Figure H.5 โ€“ Test measurement for unpinned to unpinned cabling
Figure H.6 โ€“ Step 1: obtaining reference power level P1
67 H.4.3 Procedure for unpinned to pinned cabling measurement
Figure H.7 โ€“ Step 2: verification cords, obtaining power level P2
Figure H.8 โ€“ Test measurement for unpinned to pinned cabling
68 H.4.4 Procedure for pinned to pinned cabling measurement
Figure H.9 โ€“ Step 1: obtaining reference power level P1
Figure H.10 โ€“ Step 2: obtaining power level P2
Figure H.11 โ€“ Test measurement for pinned to pinned cabling
69 Figure H.12 โ€“ Step 1: obtaining reference power level P1
Figure H.13 โ€“ Step 2: verification of cords, obtaining power level P2
70 Figure H.14 โ€“ Step 3: verification of receive cord, obtaining power level P3
71 Annex I (normative)On the use of low attenuation grade test cords
I.1 General
I.2 Practical configurations and assumptions
I.2.1 Component specifications
72 I.2.2 Conventions
I.2.3 Reference planes
73 I.3 Impact of using low attenuation grade test cords for recommended LSPM methods
I.4 Examples for LSPM measurements
I.4.1 Example 1: Configuration Au-u, 1-C method (Annex A)
Table I.1 โ€“ Measurement bias adjustment when using low attenuation grade test cords
74 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
I.5.1 Cabling configurations Au-u, Ap-u and Ap-p
75 I.5.2 Cabling configuration Du-u
Figure I.1 โ€“ Cabling configurations Au-u, Ap-u and Ap-p tested with OTDR method
Table I.2 โ€“ Acceptance figure adjustment using low attenuation grade test cords โ€“ OTDR method
76 Figure I.2 โ€“ Cabling configuration Du-u tested with OTDR method
77 Bibliography

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BS EN IEC 61280-4-5:2020
$215.11