IEC 60728-4-2007 Cable networks for television signals sound signals and interactive services - Part 4 Passive wideband equipment for coaxial cable networks (TA.pdf

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1、 IEC 60728-4 Edition 3.0 2007-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Cable networks for television signals, sound signals and interactive services Part 4: Passive wideband equipment for coaxial cable networks Rseaux de distribution par cbles pour signaux de tlvision, signaux de radiodiffusio

2、n sonore et services interactifs Partie 4: Equipement large bande passif pour les rseaux de distribution par cbles coaxiaux IEC 60728-4:2007 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication ma

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16、aires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60728-4 Edition 3.0 2007-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Cable networks for television signals, sound signals and interactive services Part 4: Passive wideband equipment for coaxial cable networks

17、 Rseaux de distribution par cbles pour signaux de tlvision, signaux de radiodiffusion sonore et services interactifs Partie 4: Equipement large bande passif pour les rseaux de distribution par cbles coaxiaux INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE V ICS 3

18、3.060.40; 33.170 PRICE CODE CODE PRIX ISBN 978-2-83220-453-5 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez v

19、ous assurer que vous avez obtenu cette publication via un distributeur agr. 2 60728-4 IEC:2007 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope . 7 2 Normative references . 7 3 Terms, definitions, symbols and abbreviations 8 3.1 Terms and definitions 8 3.2 Symbols 12 3.3 Abbreviations 13 4 Methods of

20、measurement . 13 4.1 Attenuation 13 4.1.1 Test equipment 13 4.1.2 Measurement procedure 13 4.1.3 Presentation of the results . 14 4.2 Isolation 14 4.2.1 Definition . 14 4.2.2 Test equipment 14 4.2.3 Measurement procedure 14 4.2.4 Presentation of the results . 15 4.3 Through-loss . 15 4.3.1 Definitio

21、n . 15 4.3.2 Test equipment 15 4.3.3 Measurement procedure 15 4.3.4 Presentation of the results . 15 4.4 Group delay variation 15 4.4.1 Definition . 15 4.4.2 Test equipment 15 4.4.3 Method of measurement 16 4.4.4 Presentation of the result . 16 4.5 Amplitude frequency response 16 4.6 Return loss 16

22、4.7 Hum modulation of carrier . 16 4.7.1 Definition . 16 4.7.2 Description of the method of measurement 17 4.7.3 Measuring procedure . 18 4.7.4 Calculating the hum-modulation ratio . 19 4.7.5 Presentation of the results . 20 4.8 Two-carrier intermodulation measurements for second- and third-order pr

23、oducts 20 5 Performance requirements and recommendations 21 5.1 General performance requirements and recommendations 21 5.1.1 Safety 21 5.1.2 Electromagnetic compatibility (EMC) . 21 5.1.3 Environmental . 21 5.1.4 Marking . 22 60728-4 IEC:2007 3 5.1.5 Impedance. 22 5.1.6 Degradation of performance c

24、aused by overvoltages . 22 5.2 Performance requirements and recommendations for receiver lead . 22 5.3 Performance requirements and recommendations for system outlets . 22 5.3.1 Safety 22 5.3.2 Quality grading 22 5.3.3 Mechanical requirements . 23 5.3.4 Electrical parameters and requirements . 23 5.

25、4 Performance requirements and recommendations for splitters and taps 26 5.4.1 Description 26 5.4.2 Mechanical requirements for connectors 26 5.4.3 Electrical parameters and requirements . 26 5.5 Performance requirements and recommendations for all other passive equipment . 28 5.5.1 Description 28 5

26、.5.2 Mechanical requirements for connectors 28 5.5.3 Electrical parameters and requirements . 28 Annex A (informative) Measurement errors which occur due to mismatched equipment . 30 Annex B (informative) Differences in some countries . 31 Bibliography 32 Figure 1 Test set-up for the measurement of

27、attenuation . 14 Figure 2 Test set-up for the measurement of isolation 14 Figure 3 Measurement of through-loss . 15 Figure 4 Carrier/hum ratio 16 Figure 5 Test set-up for power injectors . 17 Figure 6 Test set-up for passive equipment, excluding power injectors 18 Figure 7 Oscilloscope display 18 Fi

28、gure 8 Harmonic/Intermodulation test circuit . 20 Figure 9 Types of losses of system outlets . 25 Figure A.1 Error concerning return loss measurement 30 Figure A.2 Maximum ripple 30 Table 1 Return loss of system outlets 23 Table 2 Return loss of looped-through system outlets 24 Table 3 Maximum retur

29、n path signal level derived from maximum allowed intermodulation distortion level in the downstream frequency band . 26 Table 4 Return loss of splitters and taps 26 Table 5 Isolation of splitters . 27 Table 6 Return loss for all other passive equipment . 28 4 60728-4 IEC:2007 INTERNATIONAL ELECTROTE

30、CHNICAL COMMISSION _ CABLE NETWORKS FOR TELEVISION SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICES Part 4: Passive wideband equipment for coaxial cable networks FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardisation comprising all national ele

31、ctrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardisation in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specif

32、ications, 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. Internati

33、onal, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardisation (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal

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35、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)

36、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

37、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 liabili

38、ty 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 (includi

39、ng 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 th

40、is 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 60728-4 has been prepared by technical area 5: C

41、able networks for television signals, sound signals and interactive services, of IEC technical committee 100: Audio, video and multimedia systems and equipment. This third edition cancels and replaces the second edition published in 2000, of which it constitutes a technical revision. This edition in

42、cludes the following significant technical changes with respect to the previous edition. Subclause 3.1 includes several new or modified definitions. Clause 4 includes added test methods for attenuation, isolation, through-loss, group delay variation, amplitude frequency response and two carrier inte

43、rmodulation measurements for second- and third-order products. Clause 5 includes updated and new performance requirements. 60728-4 IEC:2007 5 This bilingual version (2012-11) corresponds to the monolingual English version, published in 2007-08. The text of this standard is based on the following doc

44、uments: FDIS Report on voting 100/1243/FDIS 100/1275/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. The French version of this standard has not been voted upon. This publication has been drafted in accordance wi

45、th the ISO/IEC Directives, Part 2. For the differences existing in some countries, see Annex B The list of all parts of the IEC 60728 series, under the general title Cable networks for television signals, sound signals and interactive services, can be found on the IEC website. The committee has deci

46、ded 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 a revised edition,

47、or amended. 6 60728-4 IEC:2007 INTRODUCTION Standards of the IEC 60728 series deal with cable networks including equipment and associated methods of measurement for headend reception, processing and distribution of television signals, sound signals and their associated data signals and for processin

48、g, interfacing and transmitting all kinds of signals for interactive services using all applicable transmission media. This includes CATV 1 -networks; MATV-networks and SMATV-networks; individual receiving networks; and all kinds of equipment, systems and installations installed in such networks. Th

49、e extent of this standardization work is from the antennas and/or special signal source inputs to the headend or other interface points to the network up to the terminal input. The standardization of any user terminals (i.e., tuners, receivers, decoders, multimedia terminals, etc.) as well as of any coaxial, balanced and optical cables and accessories thereof is excluded. 1 This word encom