{"id":465009,"date":"2024-10-20T10:38:13","date_gmt":"2024-10-20T10:38:13","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-61280-4-22024\/"},"modified":"2024-10-26T19:37:38","modified_gmt":"2024-10-26T19:37:38","slug":"bs-en-iec-61280-4-22024","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-61280-4-22024\/","title":{"rendered":"BS EN IEC 61280-4-2:2024"},"content":{"rendered":"

IEC 61280-4-2:2024 is available as IEC 61280-4-2:2024 RLV<\/span> which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62180-4-2:2024 is applicable to the measurements of attenuation and optical return loss of an installed optical fibre cabling plant using single-mode fibre. This cabling plant can include single-mode optical fibres, connectors, adapters, splices, and other passive devices. The cabling can be installed in a variety of environments including residential, commercial, industrial and data centre premises, as well as outside plant environments. This document is applicable to all single-mode fibre types including those designated by IEC 60793-2-50 as Class B fibres. The principles of this document can be applied to cabling plants containing branching devices (splitters) and at specific wavelength ranges in situations where passive wavelength selective components are deployed, such as WDM, CWDM and DWDM devices. This document is not intended to apply to cabling plants that include active devices such as fibre amplifiers or dynamic channel equalizers. This third edition cancels and replaces the second edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) addition of the equipment cord method; b) addition of test limit adjustment related to test cord grades; c) refinements on measurement uncertainties.<\/p>\n

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2<\/td>\nundefined <\/td>\n<\/tr>\n
5<\/td>\nAnnex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
6<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
12<\/td>\nFOREWORD <\/td>\n<\/tr>\n
14<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
15<\/td>\n1 Scope
2 Normative references <\/td>\n<\/tr>\n
16<\/td>\n3 Terms, definitions, graphical symbols and abbreviated terms
3.1 Terms and definitions <\/td>\n<\/tr>\n
18<\/td>\n3.2 Graphical symbols <\/td>\n<\/tr>\n
19<\/td>\nFigures
Figure 1 \u2013 Connector symbols <\/td>\n<\/tr>\n
20<\/td>\n3.3 Abbreviated terms
4 Measurement methods
4.1 General
4.1.1 Document structure
Figure 2 \u2013 Symbol for cabling under test <\/td>\n<\/tr>\n
21<\/td>\n4.1.2 Attenuation
4.1.3 Optical return loss <\/td>\n<\/tr>\n
22<\/td>\n4.2 Cabling configurations and applicable test methods
4.2.1 Cabling configurations and applicable test methods for attenuation measurements
Tables
Table 1 \u2013 Cabling configurations <\/td>\n<\/tr>\n
23<\/td>\nFigure 3 \u2013 Configuration A \u2013 Start and end of measured attenuations in RTM <\/td>\n<\/tr>\n
24<\/td>\nFigure 4 \u2013 Configuration B \u2013 Start and end of measured attenuations in RTM
Figure 5 \u2013 Configuration C \u2013 Start and end of measured attenuations in RTM <\/td>\n<\/tr>\n
25<\/td>\nFigure 6 \u2013 Configuration D \u2013 Start and end of measured attenuations in RTM
Table 2 \u2013 Test methods and configurations <\/td>\n<\/tr>\n
26<\/td>\n4.2.2 Cabling configurations and applicable test methods for optical return loss measurements
5 Overview of uncertainties for attenuation measurements
5.1 General
5.2 Sources of significant uncertainties
5.3 Consideration of the power meter <\/td>\n<\/tr>\n
27<\/td>\n5.4 Consideration of test cord and connector grade
5.4.1 General
5.4.2 Mode field diameter variation
5.5 Reflections from other interfaces
Table 3 \u2013 Test limit adjustment and uncertainty related to test cord connector grade <\/td>\n<\/tr>\n
28<\/td>\n5.6 Optical source
5.7 Output power reference
5.8 Bi-directional measurements
5.9 Typical uncertainties for attenuation methods A, B, C, and D <\/td>\n<\/tr>\n
29<\/td>\nTable 4 \u2013 Uncertainty for given fibre length and attenuation at 1 310 nm, 1 550 nm and 1 625 nm <\/td>\n<\/tr>\n
30<\/td>\n5.10 Typical uncertainty values for single-mode attenuation testing for method E
6 Apparatus
6.1 General
6.2 Light source
6.2.1 Stability
Table 5 \u2013 Uncertainty for a given fibre length at 1 310 nm and 1 550 nm using an OTDR <\/td>\n<\/tr>\n
31<\/td>\n6.2.2 Spectral characteristics
Table 6 \u2013 Spectral requirements <\/td>\n<\/tr>\n
32<\/td>\n6.3 Launch cord
6.4 Receive or tail cords
6.5 Substitution cord
6.6 Power meter \u2013 LSPM methods only <\/td>\n<\/tr>\n
33<\/td>\n6.7 OTDR apparatus
6.8 Return loss test set
Figure 7 \u2013 Typical OTDR schematic diagram <\/td>\n<\/tr>\n
34<\/td>\n6.9 Connector end-face cleaning and inspection equipment
6.10 Adapters
Figure 8 \u2013 Illustration of return loss test set <\/td>\n<\/tr>\n
35<\/td>\n7 Procedures
7.1 General
7.2 Common procedures
7.2.1 Care of the test cords
7.2.2 Make reference measurements (LSPM and OCWR methods only)
7.2.3 Inspect and clean the ends of the fibres in the cabling <\/td>\n<\/tr>\n
36<\/td>\n7.2.4 Make the measurements
7.2.5 Make the calculations
7.3 Calibration
7.4 Safety
8 Calculations
9 Documentation
9.1 Information for each test <\/td>\n<\/tr>\n
37<\/td>\n9.2 Information to be made available <\/td>\n<\/tr>\n
38<\/td>\nAnnexes
Annex A (normative) One-cord reference method
A.1 Applicability of test method
A.2 Apparatus
A.3 Procedure <\/td>\n<\/tr>\n
39<\/td>\nA.4 Calculation
Figure A.1 \u2013 One-cord reference measurement
Figure A.2 \u2013 One-cord test measurement <\/td>\n<\/tr>\n
40<\/td>\nA.5 Components of reported attenuation <\/td>\n<\/tr>\n
41<\/td>\nAnnex B (normative) Three-cord reference method
B.1 Applicability of test method
B.2 Apparatus
B.3 Procedure
Figure B.1 \u2013 Three-cord reference measurement <\/td>\n<\/tr>\n
42<\/td>\nB.4 Calculations
B.5 Components of reported attenuation
Figure B.2 \u2013 Three-cord test measurement <\/td>\n<\/tr>\n
43<\/td>\nAnnex C (normative) Two-cord reference method
C.1 Applicability of test method
C.2 Apparatus
C.3 Procedure <\/td>\n<\/tr>\n
44<\/td>\nFigure C.1 \u2013 Two-cord reference measurement
Figure C.2 \u2013 Two-cord test measurement
Figure C.3 \u2013 Two-cord test measurement for plug-to-socket style connectors <\/td>\n<\/tr>\n
45<\/td>\nC.4 Calculations
C.5 Components of reported attenuation <\/td>\n<\/tr>\n
46<\/td>\nAnnex D (normative) Equipment cord method
D.1 Applicability of the test method
D.2 Apparatus
D.3 Procedure <\/td>\n<\/tr>\n
47<\/td>\nD.4 Calculation
Figure D.1 \u2013 Reference measurement
Figure D.2 \u2013 Test measurement <\/td>\n<\/tr>\n
48<\/td>\nD.5 Components of reported attenuation <\/td>\n<\/tr>\n
49<\/td>\nAnnex E (normative) Optical time domain reflectometer
E.1 Applicability of test method
E.2 Apparatus
E.2.1 General
E.2.2 OTDR
E.2.3 Test cords <\/td>\n<\/tr>\n
50<\/td>\nE.3 Procedure (test method)
Table E.1 \u2013 Typical launch and tail cord lengths <\/td>\n<\/tr>\n
51<\/td>\nE.4 Calculation of attenuation
E.4.1 General
E.4.2 Connection location
Figure E.1 \u2013 Test measurement for OTDR method <\/td>\n<\/tr>\n
52<\/td>\nE.4.3 Definition of the power levels F1 and F2
Figure E.2 \u2013 Location of the cabling under test ports <\/td>\n<\/tr>\n
53<\/td>\nE.4.4 Alternative calculation
Figure E.3 \u2013 Graphic construction of F1 and F2 <\/td>\n<\/tr>\n
55<\/td>\nE.5 Calculation of optical return loss
Figure E.4 \u2013 Graphic construction of F1, F11, F21 and F2 <\/td>\n<\/tr>\n
57<\/td>\nE.6 Calculation of reflectance for discrete components
Figure E.5 \u2013 Graphic representation of OTDR ORL measurement <\/td>\n<\/tr>\n
58<\/td>\nFigure E.6 \u2013 Graphic representation of reflectance measurement <\/td>\n<\/tr>\n
59<\/td>\nE.7 OTDR uncertainties <\/td>\n<\/tr>\n
60<\/td>\nAnnex F (normative) Continuous wave optical return loss measurement \u2013 Method A
F.1 Applicability of test method
F.2 Apparatus
F.2.1 General
F.2.2 Light source
F.2.3 Branching device or coupler
Figure F.1 \u2013 Return loss test set illustration <\/td>\n<\/tr>\n
61<\/td>\nF.2.4 Power meters
F.2.5 Connector interface
F.2.6 Low reflection termination
F.3 Procedure
F.3.1 Test set characterization <\/td>\n<\/tr>\n
62<\/td>\nFigure F.2 \u2013 Measurement of the system internal attenuation Pref2
Figure F.3 \u2013 Measurement of the system internal attenuation Pref1
Figure F.4 \u2013 Measurement of the system reflected power Prs <\/td>\n<\/tr>\n
63<\/td>\nF.3.2 Measurement procedure
F.3.3 Calculations
Figure F.5 \u2013 Measurement of the input power Pin
Figure F.6 \u2013 Measurement of the reflected power Pr <\/td>\n<\/tr>\n
65<\/td>\nAnnex G (normative) Continuous wave optical return loss measurement \u2013 Method B
G.1 Applicability of test method
G.2 Apparatus
G.2.1 General requirements
G.2.2 Known reflectance termination
Figure G.1 \u2013 Return loss test set illustration <\/td>\n<\/tr>\n
66<\/td>\nG.3 Procedure
G.3.1 Set-up characterization
G.3.2 Measurement procedure
Figure G.2 \u2013 Measurement of Prs with reflections suppressed
Figure G.3 \u2013 Measurement of Pref with reference reflector <\/td>\n<\/tr>\n
67<\/td>\nG.3.3 Calculation
Figure G.4 \u2013 Measurement of the system reflected power Prs
Figure G.5 \u2013 Measurement of the reflected power Pr <\/td>\n<\/tr>\n
68<\/td>\nAnnex H (normative) On the use of reference-grade test cords
H.1 General
H.2 Practical configurations and assumptions
H.2.1 Component specifications <\/td>\n<\/tr>\n
69<\/td>\nH.2.2 Conventions
H.2.3 Reference planes
Table H.1 \u2013 Expected attenuation for examples <\/td>\n<\/tr>\n
70<\/td>\nH.3 Impact of using reference-grade test cords for recommended LSPM methods
H.4 Examples for LSPM measurements
H.4.1 Example 1 (configuration A, one-cord method, Annex A)
Table H.2 \u2013 Test limit adjustment when using reference-grade test cords <\/td>\n<\/tr>\n
71<\/td>\nH.4.2 Example 2 (configuration B, three-cord method, Annex B)
H.4.3 Example 3 (configuration C, two-cord method, Annex C) <\/td>\n<\/tr>\n
72<\/td>\nH.4.4 Example 4 \u2013 Long haul system (one-cord reference method)
H.5 Impact of using reference-grade test cords for different configurations using the OTDR test method
H.5.1 Cabling configurations A, B and C
Figure H.1 \u2013 Cabling configurations A, B and C tested with the OTDR method <\/td>\n<\/tr>\n
73<\/td>\nH.5.2 Cabling configuration D
Table H.3 \u2013 Test limit adjustment when using reference-grade test cords \u2013OTDR test method <\/td>\n<\/tr>\n
74<\/td>\nFigure H.2 \u2013 Cabling configuration D tested with the OTDR method <\/td>\n<\/tr>\n
75<\/td>\nAnnex I (informative) OTDR configuration information
I.1 Introductory remarks <\/td>\n<\/tr>\n
76<\/td>\nI.2 Fundamental parameters that define the operational capability of an OTDR
I.2.1 Dynamic range
I.2.2 Dynamic margin
I.2.3 Pulse width
I.2.4 Averaging time
I.2.5 Dead zone <\/td>\n<\/tr>\n
77<\/td>\nI.3 Other parameters
I.3.1 Index of refraction
I.3.2 Measurement range
I.3.3 Distance sampling
I.4 Other measurement configurations
I.4.1 General
I.4.2 Macrobend attenuation measurement
Table I.1 \u2013 Example of effective group index of refraction values <\/td>\n<\/tr>\n
78<\/td>\nI.4.3 Splice attenuation measurement
I.4.4 Measurement with high reflection connectors or short length cabling
Figure I.1 \u2013 Splice and macrobend attenuation measurement <\/td>\n<\/tr>\n
79<\/td>\nFigure I.2 \u2013 Attenuation measurement with high reflection connectors <\/td>\n<\/tr>\n
80<\/td>\nI.4.5 Ghost
Figure I.3 \u2013 Attenuation measurement of a short length cabling <\/td>\n<\/tr>\n
81<\/td>\nI.5 More on the measurement method
Figure I.4 \u2013 OTDR trace with ghost <\/td>\n<\/tr>\n
82<\/td>\nI.6 Bi-directional measurement
Figure I.5 \u2013 Cursor positioning <\/td>\n<\/tr>\n
83<\/td>\nI.7 OTDR bi-directional trace analysis
Figure I.6 \u2013 Bi-directional OTDR trace display <\/td>\n<\/tr>\n
84<\/td>\nI.8 Non-recommended practices
I.8.1 Measurement without tail cord
I.8.2 Two cursors measurement
Figure I.7 \u2013 Bi-directional OTDR trace attenuation analysis <\/td>\n<\/tr>\n
85<\/td>\nAnnex J (informative) Test cord attenuation verification
J.1 Introductory remarks
J.2 Apparatus
J.3 Procedure
J.3.1 General <\/td>\n<\/tr>\n
86<\/td>\nJ.3.2 Test cord verification for the one-cord and two-cord reference test methods when using non-pinned or unpinned and non-plug or socket style connectors <\/td>\n<\/tr>\n
87<\/td>\nJ.3.3 Test cord verification for the one-cord and two-cord reference test methods using pinned-to-unpinned or plug-to-socket style connectors
Figure J.1 \u2013 Obtaining reference power level P0
Figure J.2 \u2013 Obtaining power level P1 <\/td>\n<\/tr>\n
88<\/td>\nFigure J.3 \u2013 Obtaining reference power level P0
Figure J.4 \u2013 Obtaining power level P1 <\/td>\n<\/tr>\n
89<\/td>\nJ.3.4 Test cord verification for the three-cord reference test method using non-pinned or unpinned and non-plug or socket style connectors
Figure J.5 \u2013 Obtaining reference power level P0
Figure J.6 \u2013 Obtaining power level P1 <\/td>\n<\/tr>\n
90<\/td>\nFigure J.7 \u2013 Obtaining reference power level P0 <\/td>\n<\/tr>\n
91<\/td>\nJ.3.5 Test cord verification for the three-cord reference test method using pinned-to-unpinned or plug-to-socket style connectors
Figure J.8 \u2013 Obtaining power level P1
Figure J.9 \u2013 Obtaining power level P6 <\/td>\n<\/tr>\n
92<\/td>\nFigure J.10 \u2013 Obtaining reference power level P0
Figure J.11 \u2013 Obtaining power level P1 <\/td>\n<\/tr>\n
93<\/td>\nAnnex K (informative) Spectral attenuation measurement
K.1 Applicability of test method
K.2 Apparatus
K.2.1 Broadband light source
K.2.2 Optical spectrum analyser <\/td>\n<\/tr>\n
94<\/td>\nK.3 Procedure
K.3.1 Reference scan
K.3.2 Measurement scan
K.4 Calculations
Figure K.1 \u2013 Result of spectral attenuation measurement <\/td>\n<\/tr>\n
95<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Fibre-optic communication subsystem test procedures – Installed cabling plant. Single-mode attenuation and optical return loss measurements<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2024<\/td>\n98<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":465019,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[648,2641],"product_tag":[],"class_list":{"0":"post-465009","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-33-180-01","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/465009","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/465019"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=465009"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=465009"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=465009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}