SIST EN 61280-4-2:2014
(Main)Fibre-optic communication subsystem test procedures - Part 4-2: Installed cable plant- Single-mode attenuation and optical return loss measurement
Fibre-optic communication subsystem test procedures - Part 4-2: Installed cable plant- Single-mode attenuation and optical return loss measurement
This part of IEC 61280 is applicable to the measurement of attenuation and optical return loss
of installed optical fibre cable plant using single-mode fibre. This cable plant can include
single-mode optical fibres, connectors, adapters, splices and other passive devices. The
cabling may be installed in a variety of environments including residential, commercial,
industrial and data centre premises, as well as outside plant environments.
This standard may be applied to all single-mode fibre types including those designated by
IEC 60793-2-50 as Class B fibres.
The principles of this standard may be applied to cable plants containing branching devices
(splitters) and at specific wavelength ranges in situations where passive wavelength selective
components are deployed, such as WDMs, CWDM and DWDM devices.
This standard is not intended to apply to cable plant that includes active devices such as fibre
amplifiers or dynamic channel equalizers.
Prüfverfahren für Lichtwellenleiter-Kommunikationsuntersysteme - Teil 4-2: Installierte Kabelanlagen - Einmoden-Dämpfungs- und optische Rückflussdämpfungsmessung
Procédures d’essai des sous-systèmes de télécommunication à fibres optiques - Partie 4-2: Installations câblées - Mesure de l'affaiblissement de réflexion optique et de l'affaiblissement des fibres unimodales
IEC 61280-4-2: 2014 s'applique à la mesure de l'affaiblissement et de l'affaiblissement de réflexion optique d'un câblage en fibre optique installé en usine utilisant des fibres unimodales. Ce câblage installé peut inclure des fibres optiques unimodales, des connecteurs, des adaptateurs, des épissures et d'autres dispositifs passifs. Le câblage peut être installé dans différents environnements tels que des bâtiments résidentiels, commerciaux, industriels et des centres de traitement de données, mais aussi dans des environnements extérieurs. La présente norme peut être appliquée à tous les types de fibres unimodales y compris celles désignées comme des fibres de Classe B par l'IEC 60793-2-50. Les principes de la présente norme peuvent s'appliquer aux câblages installés contenant des dispositifs de commutation (répartiteurs) et sur des plages de longueurs d'onde spécifiques, dans des situations dans lesquelles sont déployés des composants passifs sélectifs en longueurs d'onde , par exemple des dispositifs WDM, CWDM et DWDM. La présente norme n'est pas destinée à s'appliquer à des câblages installés qui incluent des dispositifs actifs tels que des amplificateurs à fibres ou des égaliseurs de canaux de transmission dynamiques. Cette deuxième édition annule et remplace la première édition parue en 1999, dont elle constitue une révision technique. Les principales modifications portant sur cette précédente édition sont les suivantes: révision des mesures de réflectométrie optique dans le domaine temporel (OTDR); ajout des mesures de l'affaiblissement de réflexion optique (ORL); ajout d'annexes informatives sur les incertitudes de mesure, la configuration de l'OTDR, la vérification de l'affaiblissement des cordons d'essai et la mesure de l'affaiblissement spectral.
Mots clés : mesure de l'affaiblissement et de l'affaiblissement de réflexion optique d'un câblage en fibre optique installé en usine utilisant des fibres unimodales
Postopki za preskušanje optičnih komunikacijskih podsistemov - 4-2. del: Kabelska inštalacija - Meritve slabljenja v enorodnih vlaknih in optičnih povratnih izgub (IEC 61280-4-2:2014)
Ta del standarda IEC 61280 se porablja za meritve slabljenja in optičnih povratnih izgub kabelskih inštalacij optičnih vlaken z enorodnimi vlakni. Ta kabelska inštalacija lahko vključuje enorodna optična vlakna, konektorje, vmesnike, spojnice in druge pasivne naprave. Okablenje je mogoče inštalirati v različnih okoljih, vključno z domačimi, komercialnimi, industrijskimi prostori in prostori podatkovnih centrov, in tudi v okoljih dobaviteljev. Ta standard se lahko uporablja za vse vrste enorodnih vlaken, vključno s tistimi, določenimi v standardu IEC 60793-2-50 kot vlakna razreda B.
Principi tega standarda se lahko uporabljajo za kabelske inštalacije z razvejilnimi elementi (delilniki) in v določenem razponu valovne dolžine v situacijah, kjer so razmeščene pasivne valovnodolžinske selektivne komponente, kot so naprave WDM, CWDM in DWDM.
Ta standard ni namenjen za uporabo pri kabelski inštalaciji z aktivnimi napravami, kot so ojačevalniki optičnih vlaken ali dinamični kanalni stabilizatorji.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 61280-4-2:2014
01-december-2014
1DGRPHãþD
SIST EN 61280-4-2:2001
3RVWRSNL]DSUHVNXãDQMHRSWLþQLKNRPXQLNDFLMVNLKSRGVLVWHPRYGHO
.DEHOVNDLQãWDODFLMD0HULWYHVODEOMHQMDYHQRURGQLKYODNQLKLQRSWLþQLKSRYUDWQLK
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Fibre-optic communication subsystem test procedures - Part 4-2: Installed cable plant-
Single-mode attenuation and optical return loss measurement
Procédures d’essai des sous-systèmes de télécommunication à fibres optiques - Partie 4
-2: Installations câblées - Mesure de l'affaiblissement de réflexion optique et de
l'affaiblissement des fibres unimodales
Ta slovenski standard je istoveten z: EN 61280-4-2:2014
ICS:
33.180.01 6LVWHPL]RSWLþQLPLYODNQLQD Fibre optic systems in
VSORãQR general
SIST EN 61280-4-2:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 61280-4-2:2014
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SIST EN 61280-4-2:2014
EUROPEAN STANDARD EN 61280-4-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2014
ICS 33.180.01 Supersedes EN 61280-4-2:1999
English Version
Fibre-optic communication subsystem test procedures - Part 4-2:
Installed cable plant - Single-mode attenuation and optical return
loss measurement
(IEC 61280-4-2:2014)
Procédures d'essai des sous-systèmes de Prüfverfahren für Lichtwellenleiter-
télécommunication à fibres optiques - Partie 4-2: Kommunikationsuntersysteme - Teil 4-2: Installierte
Installations câblées - Mesure de l'affaiblissement de Kabelanlagen - Einmoden-Dämpfungs- und optische
réflexion optique et de l'affaiblissement des fibres Rückflussdämpfungsmessung
unimodales (IEC 61280-4-2:2014)
(CEI 61280-4-2:2014)
This European Standard was approved by CENELEC on 2014-08-01. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61280-4-2:2014 E
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SIST EN 61280-4-2:2014
EN 61280-4-2:2014 - 2 -
Foreword
The text of document 86C/1238/FDIS, future edition 2 of IEC 61280-4-2, prepared by SC 86C, "Fibre optic
systems and active devices", of IEC TC 86, "Fibre optics" was submitted to the IEC-CENELEC parallel
vote and approved by CENELEC as EN 61280-4-2:2014.
The following dates are fixed:
• latest date by which the document has (dop) 2015-05-01
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2017-08-01
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61280-4-2:1999.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 61280-4-2:2014 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60793-1-40 NOTE Harmonized as EN 60793-1-40.
IEC 60793-2 NOTE Harmonized as EN 60793-2.
IEC 61280-1-3 NOTE Harmonized as EN 61280-1-3.
IEC 61753-1 NOTE Harmonized as EN 61753-1.
IEC 61755-2-1 NOTE Harmonized as EN 61755-2-1.
IEC 61755-2-2 NOTE Harmonized as EN 61755-2-2.
1)
IEC 61755-2-4 NOTE Harmonized as EN 61755-2-4 .
1)
IEC 61755-2-5 NOTE Harmonized as EN 61755-2-5 .
1)
To be published.
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SIST EN 61280-4-2:2014
- 3 - EN 61280-4-2:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60793-2-50 - Optical fibres -- Part 2-50: Product EN 60793-2-50 -
specifications - Sectional specification for
class B single-mode fibres
IEC 60825-2 - Safety of laser products -- Part 2: Safety of EN 60825-2 -
optical fibre communication systems (OFCS)
IEC 60874-14-2 - Connectors for optical fibres and cables - - -
Part 14-2: Detail specification for fibre optic
connector type SC-PC tuned terminated to
single-mode fibre type B1
IEC 61300-3-6 - Fibre optic interconnecting devices and EN 61300-3-6 -
passive components - Basic test and
measurement procedures -- Part 3-6:
Examinations and measurements - Return
loss
IEC 61300-3-35 - Fibre optic interconnecting devices and EN 61300-3-35 -
passive components - Basic test and
measurement procedures -- Part 3-35:
Examinations and measurements - Visual
inspection of fibre optic connectors and
fibre-stub transceivers
IEC 61315 - Calibration of fibre-optic power meters EN 61315 -
IEC 61746-1 2009 Calibration of Optical Time-Domain EN 61746-1 2011
Reflectometers (OTDR) -- Part 1: OTDR for
single-mode fibres
IEC/TR 62627-01 - Fibre optic interconnecting devices and - -
passive components - Part 01: Fibre optic
connector cleaning methods
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SIST EN 61280-4-2:2014
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SIST EN 61280-4-2:2014
IEC 61280-4-2
®
Edition 2.0 2014-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre-optic communication subsystem test procedures –
Part 4-2: Installed cable plant – Single-mode attenuation and optical return
loss measurement
Procédures d’essai des sous-systèmes de télécommunication à
fibres optiques –
Partie 4-2: Installations câblées – Mesure de l'affaiblissement de réflexion
optique et de l'affaiblissement des fibres unimodales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XC
ICS 33.180.01 ISBN 978-2-8322-1665-1
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 61280-4-2:2014
– 2 – IEC 61280-4-2:2014 IEC 2014
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms, definitions, graphical symbols and abbreviations . 11
3.1 Terms and definitions . 11
3.2 Graphical symbols . 13
3.3 Abbreviations . 14
4 Measurement methods . 15
4.1 General . 15
4.2 Cabling configurations and applicable test methods . 16
4.2.1 Cabling configurations and applicable test methods for attenuation
measurements . 16
4.2.2 Cabling configurations and applicable test methods for optical return
loss measurements . 18
4.3 Overview of uncertainties . 18
4.3.1 General . 18
4.3.2 Test cords . 18
4.3.3 Reflections from other interfaces . 18
4.3.4 Optical source . 18
4.3.5 Output power reference . 19
4.3.6 Received power reference . 19
4.3.7 Mode field diameter variation . 19
4.3.8 Bi-directional measurements . 19
5 Apparatus . 19
5.1 General . 19
5.2 Light source . 19
5.2.1 Stability . 19
5.2.2 Spectral characteristics . 20
5.2.3 Launch cord . 20
5.3 Receive or tail cord . 20
5.4 Substitution cord . 21
5.5 Power meter – LSPM methods only. 21
5.6 OTDR apparatus . 21
5.7 Return loss test set . 22
5.8 Connector end-face cleaning and inspection equipment . 22
5.9 Adapters . 22
6 Procedures . 22
6.1 General . 22
6.2 Common procedures . 23
6.2.1 Care of the test cords . 23
6.2.2 Make reference measurements (LSPM and OCWR methods only) . 23
6.2.3 Inspect and clean the ends of the fibres in the cabling . 23
6.2.4 Make the measurements . 23
6.2.5 Make the calculations . 23
6.3 Calibration . 23
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SIST EN 61280-4-2:2014
IEC 61280-4-2:2014 IEC 2014 – 3 –
6.4 Safety . 24
7 Calculations . 24
8 Documentation . 24
8.1 Information for each test . 24
8.2 Information to be made available . 24
Annex A (normative) One-cord reference method . 25
A.1 Applicability of test method . 25
A.2 Apparatus . 25
A.3 Procedure . 25
A.4 Calculation . 26
A.5 Components of reported attenuation . 26
Annex B (normative) Three-cord reference method . 27
B.1 Applicability of test method . 27
B.2 Apparatus . 27
B.3 Procedure . 27
B.4 Calculations . 28
B.5 Components of reported attenuation . 28
Annex C (normative) Two-cord reference method . 29
C.1 Applicability of test method . 29
C.2 Apparatus . 29
C.3 Procedure . 29
C.4 Calculations . 31
C.5 Components of reported attenuation . 31
Annex D (normative) Optical time domain reflectometer . 32
D.1 Applicability of test method . 32
D.2 Apparatus . 32
D.2.1 General . 32
D.2.2 OTDR . 32
D.2.3 Test cords . 32
D.3 Procedure (test method) . 33
D.4 Calculation of attenuation . 34
D.4.1 General . 34
D.4.2 Connection location . 34
D.4.3 Definition of the power levels F and F . 35
1 2
D.4.4 Alternative calculation. 36
D.5 Calculation of optical return loss . 37
D.6 Calculation of reflectance for discrete components . 39
D.7 OTDR uncertainties . 40
Annex E (normative) Continuous wave optical return loss measurement – Method A . 41
E.1 Applicability of test method . 41
E.2 Apparatus . 41
E.2.1 General . 41
E.2.2 Light source . 41
E.2.3 Branching device or coupler . 41
E.2.4 Power meters . 42
E.2.5 Connector interface . 42
E.2.6 Low reflection termination . 42
E.3 Procedure . 42
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SIST EN 61280-4-2:2014
– 4 – IEC 61280-4-2:2014 IEC 2014
E.3.1 Test set characterization. 42
E.3.2 Measurement procedure . 44
E.3.3 Calculations . 44
E.3.4 Measurement uncertainty. 45
Annex F (normative) Continuous wave optical return loss measurement – Method B. 46
F.1 Applicability of test method . 46
F.2 Apparatus . 46
F.2.1 General requirements . 46
F.2.2 Known reflectance termination . 46
F.3 Procedure . 46
F.3.1 Set-up characterization . 46
F.3.2 Measurement procedure . 47
F.3.3 Calculation . 48
F.3.4 Measurement uncertainty. 48
Annex G (informative) Measurement uncertainty examples . 49
G.1 Reduction of uncertainty by using reference grade terminations and related
issues . 49
G.1.1 Motivations for using reference grade terminations on test cords . 49
G.1.2 Adjusting acceptance limits to allow for different expected losses when
using reference grade and standard grade connectors . 49
G.2 Estimation of the measurement uncertainties . 51
G.2.1 Measurement uncertainty. 51
G.2.2 Uncertainty due to the instrument . 51
G.2.3 Uncertainty due to the source . 51
G.2.4 Uncertainty due to the device under test . 52
G.2.5 Example of uncertainty accumulation using a single power meter . 53
G.2.6 Example of uncertainty accumulation using two power meters . 54
Annex H (informative) OTDR configuration information . 55
H.1 Introductory remarks . 55
H.2 Fundamental parameters that define the operational capability of an OTDR . 56
H.2.1 Dynamic range . 56
H.2.2 Pulse width . 56
H.2.3 Averaging time . 56
H.2.4 Dead zone . 56
H.3 Other parameters . 56
H.3.1 Index of refraction . 56
H.3.2 Measurement range . 57
H.3.3 Distance sampling . 57
H.4 Other measurement configurations . 57
H.4.1 General . 57
H.4.2 Macro bend attenuation measurement . 57
H.4.3 Splice attenuation measurement . 58
H.4.4 Measurement with high reflection connectors or short length cabling . 58
H.4.5 Ghost . 60
H.5 More on the measurement method . 61
H.6 Bidirectional measurement . 62
H.7 OTDR bi-directional trace analysis . 63
H.8 Non recommended practices . 64
H.8.1 Measurement without tail cord . 64
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SIST EN 61280-4-2:2014
IEC 61280-4-2:2014 IEC 2014 – 5 –
H.8.2 Cursor measurement . 64
Annex I (informative) Test cord attenuation verification . 65
I.1 Introductory remarks . 65
I.2 Apparatus . 65
I.3 Procedure . 65
I.3.1 General . 65
I.3.2 Test cord verification for the one-cord and two-cord reference test
methods when using non-pinned/unpinned and non-plug/socket style
connectors . 66
I.3.3 Test cord verification for the one-cord and two-cord reference test
methods using pinned/unpinned or plug/socket style connectors . 67
I.3.4 Test cord verification for the three-cord reference test method using
non-pinned/unpinned and non-plug/socket style connectors. 68
I.3.5 Test cord verification for the three-cord reference test method using
pinned/unpinned or plug/socket style connectors . 70
Annex J (informative) Spectral attenuation measurement . 72
J.1 Applicability of test method . 72
J.2 Apparatus . 72
J.2.1 Broadband light source . 72
J.2.2 Optical spectrum analyser . 72
J.3 Procedure . 72
J.3.1 Reference scan . 72
J.3.2 Measurement scan . 73
J.4 Calculations . 73
Bibliography . 74
Figure 1 – Connector symbols . 13
Figure 2 – Symbol for cabling under test . 14
Figure 3 – Configuration A – Start and end of measured losses in reference test
method . 16
Figure 4 – Configuration B – Start and end of measured losses in reference test
method . 17
Figure 5 – Configuration C – Start and end of measured losses in reference test
method . 17
Figure 6 – Typical OTDR schematic . 21
Figure 7 – Return loss test set illustration . 22
Figure A.1 − One-cord reference measurement . 26
Figure A.2− One-cord test measurement . 26
Figure B.1 − Three-cord reference measurement . 27
Figure B.2 − Three-cord test measurement .
...
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