IEC 62153-4-12-2009 Metallic communication cable test methods - Part 4-12 Electromagnetic compatibility (EMC) - Coupling attenuation or screening attenuation of.pdf

1、 IEC 62153-4-12 Edition 1.0 2009-08 INTERNATIONAL STANDARD Metallic communication cable test methods Part 4-12: Electromagnetic compatibility (EMC) Coupling attenuation or screening attenuation of connecting hardware Absorbing clamp method IEC 62153-4-12:2009(E) colour inside THIS PUBLICATION IS COP

2、YRIGHT 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 I

3、EC 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 Cent

4、ral 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 technologi

5、es. 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 enab

6、les 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 It also gives information on projects, withdrawn and replaced publications.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

7、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

8、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 1

9、1 Fax: +41 22 919 03 00 IEC 62153-4-12 Edition 1.0 2009-08 INTERNATIONAL STANDARD Metallic communication cable test methods Part 4-12: Electromagnetic compatibility (EMC) Coupling attenuation or screening attenuation of connecting hardware Absorbing clamp method INTERNATIONAL ELECTROTECHNICAL COMMIS

10、SION M ICS 33.100; 33.120.20 PRICE CODE ISBN 2-8318-1053-8 Registered trademark of the International Electrotechnical Commission colour inside 2 62153-4-12 IEC:2009(E) CONTENTS FOREWORD.3 1 Scope.5 2 Normative references5 3 Terms and definitions .5 4 Test method .5 4.1 Equipment .5 4.1.1 General .5

11、4.1.2 Balun requirements6 4.1.3 Test head and extension cable requirements7 4.1.4 Impedance matching8 4.2 Test sample.8 4.2.1 Length of the extension cables.8 4.2.2 Tested length.8 4.2.3 Preparation of extension cable and test head .8 4.2.4 Balanced connecting hardware.8 4.3 Calibration procedure 9

12、4.4 Test set-up9 4.4.1 General .9 4.4.2 Test set-up verification.10 4.5 Measuring procedure.11 5 Expression of test results11 6 Test report11 6.1 General .11 6.2 Evaluation of test results11 Figure 1 Measurement of surface wave at near end of connecting hardware .6 Figure 2 Termination of extension

13、cables9 Figure 3 Test set-up for a near end measurement of connecting hardware10 Figure 4 Test set-up for a near end measurement of connecting hardware10 Figure 5 Typical measurement of screened connecting hardware12 Figure 6 Typical measurement of an unscreened balanced connecting hardware 13 Figur

14、e 7 Typical measurement of a screened balanced connecting hardware13 Table 1 Balun performance characteristics (30 MHz to 1 GHz)7 62153-4-12 IEC:2009(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ METALLIC COMMUNICATION CABLE TEST METHODS Part 4-12: Electromagnetic compatibility (EMC) Coupling att

15、enuation or screening attenuation of connecting hardware Absorbing clamp method 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 promo

16、te 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 (

17、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

18、 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 possib

19、le, 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. Whil

20、e 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 t

21、o 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 indic

22、ate 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

23、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 u

24、pon, 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 element

25、s 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 62153-4-12 has been prepared by IEC technical committee 46: Cables, wires, waveguides, R.F. connectors, R.F. and microwave passiv

26、e components and accessories. The text of this standard is based on the following documents: CDV Report on voting 46/312/CDV 46/328/RVC 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 is to be read i

27、n conjunction with IEC 62153-4-5 (2006). 4 62153-4-12 IEC:2009(E) This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 62153 series, under the general title: Metallic communication cable test methods, can be found on the IEC website. The

28、 committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by

29、a revised edition, or amended. A bilingual version may be issued at a later date. IMPORTANT The “colour inside” logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print

30、this publication using a colour printer. 62153-4-12 IEC:2009(E) 5 METALLIC COMMUNICATION CABLE TEST METHODS Part 4-12: Electromagnetic compatibility (EMC) Coupling attenuation or screening attenuation of connecting hardware Absorbing clamp method 1 Scope This part of IEC 62153 details the method of

31、test to determine the coupling attenuation or screening attenuation for connecting hardware used in analogue and digital communication systems. The test method details means to test one part of a connecting hardware (e. g. wall outlet or plug alone) as well as testing a mated pair of connecting hard

32、ware. 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 60050-726, Inter

33、national Electrotechnical Vocabulary Chapter 726: Transmission lines and waveguides IEC 61196-1, Coaxial communication cables Part 1: Generic specification General, definitions and requirements IEC 62153-4-5:2006, Metallic communication cables test methods Part 4-5: Electromagnetic compatibility (EM

34、C) Coupling or screening attenuation Absorbing clamp method ITU-T Recommendation G.117:1996, Transmission aspects of unbalance about earth ITU-T Recommendation O.9:1999, Measuring arrangements to assess the degree of unbalance about earth 3 Terms and definitions For the purposes of this document, th

35、e terms and definitions given in IEC 60050-726 and IEC 61196-1 apply. In this document, connecting hardware is defined as a complete connecting device including compensating or matching networks (if any), connectors and cable terminations. 4 Test method 4.1 Equipment 4.1.1 General See 5.1.1 of IEC 6

36、2153-4-5, and Figure 1 below. 6 62153-4-12 IEC:2009(E) The connecting hardware under test shall be terminated using the termination method and a cable type for which it is constructed. If only one part of the connecting hardware is under test, a test head shall be used to mate the part under test. 6

37、00 cm 10 cm 300 cm 5 cm 5 0 11 2 6 8 3 10 12 4 9 13 1 14 7 300 cm 5 cm IEC 1342/09 Key 0 signal generator, output impedance Z 0 1 connecting hardware under test, nominal characteristic impedance Z 1 2 outer circuit of connecting hardware under test, impedance Z 2 3 absorbing clamp, impedance Z 3 4 m

38、easuring receiver 5 balun (if applicable) 6 current transformer of the clamp 7 measuring receiver cable (use the same in measurement and calibration) 8 absorber (ferrite tube) of the clamp, operational attenuation 10 dB 9 absorber (or second clamp), operational attenuation 10 dB 10 termination of th

39、e far end extension cable terminating the connecting hardware 11 shield of signal generator and balun if needed for high dynamic range 12 reflector plate 13 extension cable terminating the connecting hardware at far end 14 extension cable terminating the test head or connecting hardware at near end

40、Figure 1 Measurement of surface wave at near end of connecting hardware 4.1.2 Balun requirements For measurement of balanced connecting hardware, a means for generating balanced signals shall be provided. If the generator is unbalanced, this may be performed by the use of a balun or 180 power splitt

41、er. The minimum requirements for this device are specified in Table 1. The attenuation of the balun shall be kept as low as possible because it will limit the dynamic range of the coupling attenuation or screening attenuation measurements. 62153-4-12 IEC:2009(E) 7 Table 1 Balun performance character

42、istics (30 MHz to 1 GHz) Parameter Value Impedance, primary a50 (unbalanced) Impedance, secondary b100 or 150 (balanced) Operational attenuation d(including matching pads if used) 10 dB Return loss, bi-directional 6 dB Power rating To accommodate the power of the generator and amplifier (if applicab

43、le) Output signal balance c 50 dB from 30 MHz to 100 MHz 30 dB from 100 MHz to 1 GHz aPrimary impedance may differ, if necessary, to accommodate analyzer outputs other than 50 . bBalanced outputs of the test baluns shall be matched to the nominal impedance of the balanced terminating cable pair. 100

44、 shall be used for termination of 120 cabling. c Measured per ITU-T Recommendations G.117 and O.9. dThe operational attenuation of a balun shall be mathematically deduced from 3 operational attenuation measurements with 3 baluns back-to-back. 4.1.3 Test head and extension cable requirements 4.1.3.1

45、General requirements Unscreened balanced test heads (if applicable) and extension cables shall be used for testing unscreened, balanced connecting hardware. Screened balanced test heads (if applicable) and extension cables shall be used for testing screened, balanced connecting hardware. Unbalanced

46、coaxial) test heads (if applicable) and extension cables shall be used for testing unbalanced connecting hardware. The electrical transmission performance including electromagnetic screening and unbalance attenuation of the test head (if applicable) and the extension cable shall be better or equal

47、to the performance of the connecting hardware under test. The choice of the extension cable should assure the minimum operational attenuation and reflection loss of the set-up possible. The extension cables shall have the same nominal characteristic impedance as the connecting hardware under test. T

48、he velocity of propagation for the two extension cables, terminating the connecting hardware, shall be similar (same type of insulation, for example foamed or solid). The operational attenuation of the near end terminating cable including test head (if applicable) shall be less than 1 dB up to 100 M

49、Hz. The extension cables shall have a balance (when measuring balanced patch cords) and shall have a screen (when measuring screened patch cords) as good as possible. 4.1.3.2 Testing one part of connecting hardware Testing one part of connecting hardware requires a test head which mates the connecting hardware under test. The test head, the extension cable and the connection between test head and the extension cable shall have