收藏 分享(赏)

IEC_61746-2-2010.pdf

上传人:益****师 文档编号:234018 上传时间:2023-03-14 格式:PDF 页数:48 大小:1.08MB
下载 相关 举报
IEC_61746-2-2010.pdf_第1页
第1页 / 共48页
IEC_61746-2-2010.pdf_第2页
第2页 / 共48页
IEC_61746-2-2010.pdf_第3页
第3页 / 共48页
IEC_61746-2-2010.pdf_第4页
第4页 / 共48页
IEC_61746-2-2010.pdf_第5页
第5页 / 共48页
IEC_61746-2-2010.pdf_第6页
第6页 / 共48页
亲,该文档总共48页,到这儿已超出免费预览范围,如果喜欢就下载吧!
资源描述

1、 IEC 61746-2Edition 1.0 2010-06INTERNATIONAL STANDARD Calibration of optical time-domain reflectometers(OTDR)Part 2:OTDR for multimode fibres IEC 61746-2:2010(E)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of thi

2、s 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

3、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 Ele

4、ctrotechnical 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 y

5、ou 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to search by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,withdrawn a

6、nd 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 el

7、ectronic 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 fee

8、dback 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 IEC 61746-2Edition 1.0 2010-06INTERNATIONAL STANDARD Calibration of optical time-domain reflectometers(OTDR)Part 2:OTDR for multi

9、mode fibres INTERNATIONAL ELECTROTECHNICAL COMMISSION XICS 33.180.01 PRICE CODEISBN 978-2-88912-026-0 Registered trademark of the International Electrotechnical Commission 2 61746-2 IEC:2010(E)CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms,definitions and symbols.7 4 P

10、reparation for calibration.13 4.1 Organization.13 4.2 Traceability.13 4.3 Preparation.13 4.4 Test conditions.13 4.5 Documentation.13 5 Distance calibration General.14 5.1 General.14 5.2 Location deviation model.14 5.3 Using the calibration results.16 5.4 Measuring fibre length.17 6 Distance calibrat

11、ion methods.17 6.1 General.17 6.2 External source method.17 6.2.1 Short description and advantage.17 6.2.2 Equipment.17 6.2.3 Calibration of the equipment.19 6.2.4 Measurement procedure.20 6.2.5 Calculations and results.20 6.2.6 Uncertainties.21 6.3 Concatenated fibre method(using multimode fibres).

12、23 6.3.1 Short description and advantages.23 6.3.2 Equipment.23 6.3.3 Measurement procedures.24 6.3.4 Calculations and results.24 6.3.5 Uncertainties.25 6.4 Recirculating delay line method.26 6.4.1 Short description and advantages.26 6.4.2 Equipment.27 6.4.3 Measurement procedure.28 6.4.4 Calculatio

13、ns and results.28 6.4.5 Uncertainties.29 7 Vertical scale calibration General.30 7.1 General.30 7.2 Loss difference calibration.31 7.2.1 Determination of the displayed power level F.31 7.2.2 Development of a test plan.31 7.3 Characterization of the OTDR source near field.33 7.3.1 Objectives and refe

14、rences.33 7.3.2 Procedure.33 8 Loss difference calibration method.34 61746-2 IEC:2010(E)3 8.1 General.34 8.2 Long fibre method.34 8.2.1 Short description.34 8.2.2 Equipment.34 8.2.3 Measurement procedure.36 8.2.4 Calculation and results.36 Annex A(normative)Multimode recirculating delay line for dis

15、tance calibration.37 Annex B(normative)Mathematical basis.41 Bibliography.44 Figure 1 Definition of attenuation dead zone.8 Figure 2 Representation of the location deviation L(L).15 Figure 3 Equipment for calibration of the distance scale External source method.18 Figure 4 Set-up for calibrating the

16、 system insertion delay.19 Figure 5 Concatenated fibres used for calibration of the distance scale.23 Figure 6 Distance calibration with a recirculating delay line.27 Figure 7 OTDR trace produced by recirculating delay line.28 Figure 8 Determining the reference level and the displayed power level.31 Figure 9 Region A,the recommended region for loss measurement samples.32 Figure 10 Possible placement of sample points within region A.33 Figure 11 Linearity measurement with a long fibre.35 Figure 1

展开阅读全文
相关资源
猜你喜欢
相关搜索

当前位置:首页 > 专业资料 > 国外标准

copyright@ 2008-2023 wnwk.com网站版权所有

经营许可证编号:浙ICP备2024059924号-2