SIST EN 61280-4-1:2005
(Main)Fibre-optic communication subsystem test procedures -- Part 4-1: Cable plant and links - Multimode fibre-optic cable plant attenuation measurement
Fibre-optic communication subsystem test procedures -- Part 4-1: Cable plant and links - Multimode fibre-optic cable plant attenuation measurement
Establishes preferred measurement principles and practices to assure that meaningful data describing the optical loss performance of installed cable plants can be obtained.It is not intended for component testing, it does not define those elements of an installation that need to be measured. This procedure is a specific test associated with EN 61281-1. This procedure can be used to measure the optical loss between any two passively connected points, including end terminations, of a multimode optical fibre cable plant.
Prüfverfahren für Lichtwellenleiter-Kommunikationsuntersysteme -- Teil 4-1: Lichtwellenleiter-Kabelanlagen - Dämpfungsmessung in Mehrmoden-LWL-Kabelanlagen
Procédures d'essai des sous-systèmes de télécommunication à fibres optiques -- Partie 4-1: Installation de câbles et liens - Mesure de l'affaiblissement des installations de câbles à fibres optiques multimodales
Etablit les principes et les pratiques de mesure préférentiels pour assurer l'acquisition des données significatives qui décrivent le fonctionnement de l'affaiblissement optique d'une installation de câbles. Elle ne s'applique pas aux essais des composants et n'indique pas les éléments de l'installation qui doivent être mesurés. Cette procédure est un essai spécifique associé à la EN 61281-1. Cette procédure peut être utilisée pour mesurer l'affaiblissement optique entre deux points quelconques reliés de manière passive, y compris les terminaisons d'extrémités, sur une installation de câbles à fibres optiques multimodal.
Postopki za preskušanje komunikacijskih podsistemov z optičnimi vlakni – 4-1. del: Kabelska oprema in povezave - Meritve slabljenja večrodne optične kabelske opreme (IEC 61280-4-1:2003)
General Information
Relations
Standards Content (Sample)
SLOVENSKI SIST EN 61280-4-1:2005
STANDARD
februar 2005
Postopki za preskušanje komunikacijskih podsistemov z optičnimi vlakni – 4-
1. del: Kabelska oprema in povezave - Meritve slabljenja večrodne optične
kabelske opreme (IEC 61280-4-1:2003)
Fibre-optic communication subsystem test procedures - Part 4-1: Cable plant and
links - Multimode fibre-optic cable plant attenuation measurement (IEC 61280-4-
1:2003)
ICS 33.180.01 Referenčna številka
SIST EN 61280-4-1:2005(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
---------------------- Page: 1 ----------------------
EUROPEAN STANDARD EN 61280-4-1
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2004
ICS 33.180.01
English version
Fibre-optic communication subsystem test procedures
Part 4-1: Cable plant and links –
Multimode fibre-optic cable plant attenuation measurement
(IEC 61280-4-1:2003)
Procédures d'essai des sous-systèmes Prüfverfahren für Lichtwellenleiter-
de télécommunication à fibres optiques Kommunikationsuntersysteme
Partie 4-1: Installation de câbles et liens - Teil 4-1: Lichtwellenleiter-Kabelanlagen -
Mesure de l'affaiblissement Dämpfungsmessung in Mehrmoden-LWL-
des installations de câbles Kabelanlagen
à fibres optiques multimodales (IEC 61280-4-1:2003)
(CEI 61280-4-1:2003)
This European Standard was approved by CENELEC on 2004-05-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61280-4-1:2004 E
---------------------- Page: 2 ----------------------
EN 61280-4-1:2004 - 2 -
Foreword
The text of document 86C/550/FDIS, future edition 1 of IEC 61280-4-1, 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 was approved by CENELEC as EN 61280-4-1 on 2004-05-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2005-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-05-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61280-4-1:2003 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 61280-4-2 NOTE Harmonized as EN 61280-4-2:1999 (not modified).
IEC 61300-3-31 NOTE Harmonized as EN 61300-3-31:2003 (not modified).
IEC 61315 NOTE Harmonized as EN 61315:1997 (not modified).
__________
---------------------- Page: 3 ----------------------
- 3 - EN 61280-4-1:2004
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60793-1-40 2001 Optical fibres EN 60793-1-40 2003
(mod) Part 1-40: Measurement methods and
test procedures – Attenuation
IEC 60825-1 1993 Safety of laser products EN 60825-1 1994
Part 1: Equipment classification, + corr. February 1995
requirements and user's guide + A11 1996
IEC 61281-1 1999 Fibre optic communication subsystems EN 61281-1 1999
Part 1: Generic specification
IEC 61300-3-4 2001 Fibre optic interconnecting devices and EN 61300-3-4 2001
passive components - Basic test and
measurement procedures
Part 3-4: Examinations and
measurements - Attenuation
---------------------- Page: 4 ----------------------
NORME CEI
INTERNATIONALE IEC
61280-4-1
INTERNATIONAL
Première édition
STANDARD
First edition
2003-09
Procédures d'essai des sous-systèmes
de télécommunication à fibres optiques –
Partie 4-1:
Installation de câbles et liens –
Mesure de l'affaiblissement des installations
de câbles à fibres optiques multimodales
Fibre-optic communication subsystem
test procedures –
Part 4-1:
Cable plant and links –
Multimode fibre-optic cable plant
attenuation measurement
IEC 2003 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
R
Commission Electrotechnique Internationale PRICE CODE
International Electrotechnical Commission
Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 5 ----------------------
61280-4-1 IEC:2003 – 3 –
CONTENTS
FOREWORD . 5
1 Scope . 9
2 Normative references. 9
3 Apparatus .11
3.1 Light sources . 11
3.2 Safety. 11
3.3 Optical power measurement equipment . 11
3.4 Test jumpers. 11
3.5 Miscellaneous equipment. 13
4 Test sample . 13
5 Procedure .13
5.1 General procedure. 13
5.2 Method 1 – Two-jumper reference. 13
5.3 Method 2 – One jumper reference. 15
5.4 Method 3 – Three jumper reference . 17
6 Calculations .17
6.1 Calculation of results . 17
6.2 Precision and bias . 19
6.2.1 Precision. 19
6.2.2 Bias . 19
7 Documentation. 19
7.1 Required information . 19
7.2 Available information . 19
7.3 Specifying information . 19
Annex A (normative) Coupled power ratio measurement for fibre-optic sources. 21
Annex B (informative) Recommendations on the use of this part of IEC 61280 . 25
Annex C (informative) Coupled power ratio measurement for fibre-optic sources –
Background information. 31
Bibliography . 37
---------------------- Page: 6 ----------------------
61280-4-1 IEC:2003 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE-OPTIC COMMUNICATION SUBSYSTEM TEST PROCEDURES –
Part 4-1: Cable plant and links –
Multimode fibre-optic cable plant attenuation measurement
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61280-4-1 has been prepared by subcommittee 86C: Fibre-optic
systems and active devices, of IEC technical committee 86: Fibre-optics.
The text of this standard is based on the following documents:
FDIS Report on voting
86C/550/FDIS 86C/572/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
---------------------- Page: 7 ----------------------
61280-4-1 IEC:2003 – 7 –
IEC 61280 consists of the following parts under the general title Fibre optic communication
1
subsystem test procedures :
2)
Part 1: General communication subsystems
3)
Part 2: Digital systems
4)
Part 4: Cable plant and links
Part 3 is in preparation.
The committee has decided that the contents of this publication will remain unchanged until
2008. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
___________
1)
The general title of the IEC 61280 series has changed. Previous parts were published under the general title
Fibre optic communication subsystem basic test procedures
2) The title of Part 1 has changed. Parts 1-1 and 1-3 were published under the title Test procedures for general
communication subsystems.
3) The title of Part 2 has changed. Parts 2-1, 2-2, 2-4 and 2-5 were published under the title Test procedures for
digital systems.
4) The title of Part 4 has changed. Part 4-2 was published under the title Fibre optic cable plant.
---------------------- Page: 8 ----------------------
61280-4-1 IEC:2003 – 9 –
FIBRE-OPTIC COMMUNICATION SUBSYSTEM TEST PROCEDURES –
Part 4-1: Cable plant and links –
Multimode fibre-optic cable plant attenuation measurement
1 Scope
This part of IEC 61280 establishes preferred measurement principles and practices to assure
that meaningful data describing the optical loss performance of installed cable plants can be
obtained. It is not intended for component testing, nor does it define those elements of an
installation that need to be measured. Establishment of requirements for installation,
maintenance, repair or conformance testing is left to the specifier of this test method.
This procedure is a specific test associated with IEC 61281-1.
This procedure can be used to measure the optical loss between any two passively connected
points, including end terminations, of a multimode optical fibre cable plant. The optical fibre
cable plant, as the term is used here, may consist of optical fibre cables, connectors,
mounting panels, jumper cables, and other passive components, but may not include active
components. An example of a cable plant could be a portion of a LED (light emitting diode)-
based local area network. This could include optical switches or couplers, but would exclude
gain elements in the connected path.
The accuracy of this test method depends upon proper selection of the test methods
contained herein and other factors. Refer to Annex B for additional information.
This test method utilizes test jumpers to facilitate a field measurement that includes all loss
elements within the cable plant. It may, therefore depending on the method chosen, include
connection losses that do not appear in method B of IEC 60793-1-40 – insertion loss
technique (for fibres). For guidance in selecting a method, refer to Annex B.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60793-1-40:2001, Optical fibres – Part 1-40: Measurement methods and test procedures
– Attenuation
IEC 60825-1, Safety of laser products – Part 1: Equipment classification, requirements and
user's guide
IEC 61281-1, Fibre optic communication subsystems – Part 1: Generic specification
IEC 61300-3-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-4: Examination and measurements – Attenuation
---------------------- Page: 9 ----------------------
61280-4-1 IEC:2003 – 11 –
3 Apparatus
3.1 Light sources
The light sources shall conform to the spectral characteristics of Table 1 and modal launch
conditions that follow, unless otherwise specified in the detail specification or other reference
document.
Table 1 – Light source characteristics
Centre wavelength Spectral width
nm nm, FWHM
850 ± 30 30 – 60
1 300 ± 20 100 – 140
The light sources may contain internal lenses, pigtails and mode conditioners, provided they
meet the following modal launch conditions.
The modal launch conditions from the light source shall be characterized as one of
categories 1 through 5 following the procedure in Annex A. If not otherwise specified in a
reference document, light sources from category 1 shall be used and noted in the test report
(see 7.1). Category 1 sources result in the highest measured cable plant loss.
NOTE Characterization of the modal launch conditions by category is not required if the test set transmitter has
the same characteristics as the system source.
This test method does not specify precision or accuracy requirements for the test equipment.
However, the stability of the light source directly contributes to measurement variability. Use a
light source that is sufficiently stable to meet the desired measurement precision.
3.2 Safety
All tests performed on optical fibre communication systems, or that use a laser or LED in a
test set, shall be carried out with safety precautions in accordance with IEC 60825-1.
3.3 Optical power measurement equipment
Use equipment capable of measuring relative or absolute optical power (such as an optical
power meter) which is designed in such a way as to make power measurements independent
of the modal distribution. This test method does not specify precision or accuracy
requirements for this equipment; therefore, the user is responsible for determining whether
the equipment temperature stability and optical power linearity are consistent with the
accuracy and precision that is desired.
NOTE Non-linearity between the measured and incident optical power will introduce measurement error. Also,
equipment with internal waveguides may exhibit measurement variability with varying modal conditions.
3.4 Test jumpers
Unless otherwise specified by a network standard, the test jumper fibres (optical fibres within
the test patchcords) shall have the core diameter and numerical aperture nominally equal to
those of the cable plant or link under test being measured. The jumpers shall be 1 m to 5 m
long, and shall contain fibres with coatings, or contain appropriate mechanisms, that remove
cladding light. Terminations shall be compatible with the light source and cable plant.
---------------------- Page: 10 ----------------------
61280-4-1 IEC:2003 – 13 –
Test patchcords connected to light sources should incorporate a mandrel wrap to maximise
measurement repeatability. The diameter of the mandrel may differ from fibre to fibre depend-
ing upon fibre and coating type. The mandrel diameters recommended in IEC 60793-1-40
when using 5 turns are: a 25 mm diameter for a fibre with a core of 50 µm and 20 mm
diameter for fibre with a core of 62,5 µm. For patchcords, the value of the mandrel diameter is
reduced by the value of the patchcord diameter.
3.5 Miscellaneous equipment
To interface test jumpers with the cable plant, appropriate adapters may be required.
Materials to clean the connections (such as reagent grade alcohol, cotton swabs and clean
compressed air) may also be required. Equipment to inspect connectors for damage may be
helpful.
4 Test sample
The specifier shall describe, with appropriate documentation, which elements are to be
measured (see Annex B).
NOTE Generally, the description will concern one of the following cases: all cable segments or a set of segments
configured into point-to-point runs (through jumpers, patch panels, junction boxes, adapters, etc.).
5 Procedure
Measure the optical loss of the cable plant according to one of the following methods. For
guidance in selecting a method, see Annex B.
– Method 1 – two-jumper reference (see 5.2).
– Method 2 – one-jumper reference (see 5.3).
– Method 3 – three-jumper reference (see 5.4).
5.1 General procedure
To achieve consistent results, clean all connections and adapters at the optical test points
prior to measurement.
Unless otherwise specified in the detail specification, perform the following procedures at the
wavelengths specified in
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.