IEC_61280-4-1-2009.pdf

IEC 61280-4-1Edition 2.0 2009-06INTERNATIONAL STANDARD Fibre-optic communication subsystem test procedures Part 4-1:Installed cable plant Multimode attenuation measurement IEC 61280-4-1:2009(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2009 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office 3,rue de Varemb CH-1211 Geneva 20 Switzerland Email:inmailiec.ch Web:www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.?Catalogue of IEC publications:www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,withdrawn and replaced publications.?IEC Just Published:www.iec.ch/online_news/justpub Stay up to date on all new IEC publications.Just Published details twice a month all new publications released.Available on-line and also by email.?Electropedia:www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French,with equivalent terms in additional languages.Also known as the International Electrotechnical Vocabulary online.?Customer Service Centre:www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance,please visit the Customer Service Centre FAQ or contact us:Email:csciec.ch Tel.:+41 22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC 61280-4-1Edition 2.0 2009-06INTERNATIONAL STANDARD Fibre-optic communication subsystem test procedures Part 4-1:Installed cable plant Multimode attenuation measurement INTERNATIONAL ELECTROTECHNICAL COMMISSION XBICS 33.180.01 PRICE CODEISBN 2-8318-1045-4 Registered trademark of the International Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 61280-4-1 IEC:2009(E)CONTENTS FOREWORD.5 1 Scope.7 2 Normative references.7 3 Terms,definitions,graphical symbols and acronyms.8 3.1 Terms and definitions.8 3.2 Graphical symbols.9 3.3 Acronyms.11 4 Measurement methods.11 4.1 General.11 4.2 Cabling configurations and applicable test methods.12 4.3 Overview of uncertainties.12 4.3.1 General.12 4.3.2 Test cords.13 4.3.3 Launch conditions at the connection to the cabling under test.13 4.3.4 Optical source.13 4.3.5 Output power reference.13 4.3.6 Received power reference.14 5 Apparatus.14 5.1 General.14 5.2 Light source.14 5.2.1 Stability.14 5.2.2 Spectral characteristics.14 5.2.3 Launch cord.14 5.3 Receive or tail cord.15 5.4 Substitution/dummy cord.15 5.5 Power meter LSPM methods only.15 5.6 OTDR apparatus.15 5.7 Connector end-face cleaning and inspection equipment.16 5.8 Adapters.16 6 Procedures.16 6.1 General.16 6.2 Common procedures.17 6.2.1 Care of the test cords.17 6.2.2 Make reference measurements(LSPM methods only).17 6.2.3 Inspect and clean the ends of the fibres in the cabling.17 6.2.4 Make the measurements.17 6.2.5 Make the calculations.17 6.3 Calibration.17 6.4 Safety.17 7 Calculations.17 8 Documentation.18 8.1 Information for each test.18 8.2 Information to be available.18 Annex A(normative)One-cord reference method.19 Annex B(normative)Three-cord reference method.21 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.61280-4-1 IEC:2009(E)3 Annex C(normative)Two-cord reference method.23 Annex D(normative)Optical time domain reflectometer.26 Annex E(normative)Requirements for the source characteristics for multimode measurement.32 Annex F(informative)Measurement uncertainty examples.35 Annex G(informative)OTDR configuration information.44 Annex H(informative)Test cord insertion loss verification.53 Bibliography.61 Figure 1a Socket and plug assembly.10 Figure 1b Connector set(plug,adapter,plug).10 Figure 1c Light source.10 Figure 1d Power meter.10 Figure 1 Connector symbols