1、BRITISH STANDARDBS EN 60728-4:2008Cable networks for television signals, sound signals and interactive services Part 4: Passive wideband equipment for coaxial cable networksICS 33.060.40; 33.170g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38
2、g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60728-4:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2008 BSI 2008ISBN 978 0 580 56972 2National forewordThis British Standard
3、is the UK implementation of EN 60728-4:2008. It is identical to IEC 60728-4:2007. It supersedes BS EN 50083-4:1999 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment.A list of organizations repre
4、sented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/
5、corrigenda issued since publicationDate CommentsEUROPEAN STANDARD EN 60728-4 NORME EUROPENNE EUROPISCHE NORM May 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat:
6、rue de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60728-4:2008 E ICS 33.060.40; 33.170 Supersedes EN 50083-4:1998English version Cable networks for television signals, sound signals and int
7、eractive services - Part 4: Passive wideband equipment for coaxial cable networks (IEC 60728-4:2007) Rseaux de distribution par cbles pour signaux de tlvision, signaux de radiodiffusion sonore et services interactifs - Partie 4: Equipements large bande passifs relatifs aux rseaux cbls coaxiaux (CEI
8、60728-4:2007) Kabelnetze fr Fernsehsignale, Tonsignale und interaktive Dienste - Teil 4: Passive Breitbandgerte fr koaxiale Kabelnetze (IEC 60728-4:2007) This European Standard was approved by CENELEC on 2008-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
9、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 St
10、andard exists in two official versions (English and 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 e
11、lectrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Swi
12、tzerland and the United Kingdom. Foreword The text of document 100/1243/FDIS, future edition 3 of IEC 60728-4, prepared by technical area 5, Cable networks for television signals, sound signals and interactive services, of IEC TC 100, Audio, video and multimedia systems and equipment, was submitted
13、to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60728-4 on 2008-04-01. This European Standard supersedes EN 50083-4:1998 + corrigendum January 1999. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical n
14、ational standard or by endorsement (dop) 2009-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-04-01 For this European Standard the informative Annex B of IEC 60728-4:2007 shall be disregarded and has been replaced by the normative Annex ZB, S
15、pecial national conditions; and the informative Annex ZC, A-deviations. Annexes ZA, ZB and ZC have been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60728-4:2007 was approved by CENELEC as a European Standard without any modification. _ BS EN 60728-4:2008 2 CONTE
16、NTS INTRODUCTION.5 1 Scope.6 2 Normative references .6 3 Terms, definitions, symbols and abbreviations7 3.1 Terms and definitions 7 3.2 Symbols 11 3.3 Abbreviations 12 4 Methods of measurement .12 4.1 Attenuation12 4.1.1 Test equipment12 4.1.2 Measurement procedure12 4.1.3 Presentation of the result
17、s.13 4.2 Isolation 13 4.2.1 Definition.13 4.2.2 Test equipment13 4.2.3 Measurement procedure13 4.2.4 Presentation of the results.14 4.3 Through-loss .14 4.3.1 Definition.14 4.3.2 Test equipment14 4.3.3 Measurement procedure14 4.3.4 Presentation of the results.14 4.4 Group delay variation 14 4.4.1 De
18、finition.14 4.4.2 Test equipment14 4.4.3 Method of measurement 15 4.4.4 Presentation of the result.15 4.5 Amplitude frequency response 15 4.6 Return loss15 4.7 Hum modulation of carrier .15 4.7.1 Definition.15 4.7.2 Description of the method of measurement16 4.7.3 Measuring procedure.17 4.7.4 Calcul
19、ating the hum-modulation ratio.18 4.7.5 Presentation of the results.19 4.8 Two-carrier intermodulation measurements for second- and third-order products 19 5 Performance requirements and recommendations 20 5.1 General performance requirements and recommendations 20 5.1.1 Safety20 5.1.2 Electromagnet
20、ic compatibility (EMC) .20 5.1.3 Environmental .20 5.1.4 Marking .21 5.1.5 Impedance.21 BS EN 60728-4:2008 3 5.1.6 Degradation of performance caused by overvoltages.21 5.2 Performance requirements and recommendations for receiver lead .21 5.3 Performance requirements and recommendations for system o
21、utlets.21 5.3.1 Safety21 5.3.2 Quality grading 21 5.3.3 Mechanical requirements.22 5.3.4 Electrical parameters and requirements.22 5.4 Performance requirements and recommendations for splitters and taps 25 5.4.1 Description 25 5.4.2 Mechanical requirements for connectors25 5.4.3 Electrical parameter
22、s and requirements.25 5.5 Performance requirements and recommendations for all other passive equipment .27 5.5.1 Description 27 5.5.2 Mechanical requirements for connectors27 5.5.3 Electrical parameters and requirements.27 Bibliography 31 Annex A (informative) Measurement errors which occur due to m
23、ismatched equipment .29 Annex B (informative) Differences in some countries .30 Figure 1 Test set-up for the measurement of attenuation .13 Figure 2 Test set-up for the measurement of isolation13 Figure 3 Measurement of through-loss.14 Figure 4 Carrier/hum ratio15 Figure 5 Test set-up for power inje
24、ctors .16 Figure 6 Test set-up for passive equipment, excluding power injectors 17 Figure 7 Oscilloscope display 17 Figure 8 Harmonic/Intermodulation test circuit .19 Figure 9 Types of losses of system outlets.24 Figure A.1 Error concerning return loss measurement29 Figure A.2 Maximum ripple 29 Tabl
25、e 1 Return loss of system outlets 22 Table 2 Return loss of looped-through system outlets 23 Table 3 Maximum return path signal level derived from maximum allowed intermodulation distortion level in the downstream frequency band .25 Table 4 Return loss of splitters and taps 25 Table 5 Isolation of s
26、plitters .26 Table 6 Return loss for all other passive equipment .27 BS EN 60728-4:2008 4 Annex ZB (normative) Special national conditions. .34 corresponding European publications. .32 Annex ZA (normative) Normative references to international publications with their Annex ZC (informative) A-deviati
27、ons 35 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 processing, interfacing and trans
28、mitting all kinds of signals for interactive services using all applicable transmission media. This includes CATV1-networks; MATV-networks and SMATV-networks; individual receiving networks; and all kinds of equipment, systems and installations installed in such networks. The extent of this standardi
29、zation 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 opt
30、ical cables and accessories thereof is excluded. 1 This word encompasses the HFC networks used nowadays to provide telecommunications services, voice, data, audio and video both broadcast and narrowcast.BS EN 60728-4:2008 5 CABLE NETWORKS FOR TELEVISION SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICE
31、S Part 4: Passive wideband equipment for coaxial cable networks 1 Scope This part of IEC 60728 applies to system outlets, splitters and taps, passive single or multiple port equipment comprising filters, attenuators, equalizers, galvanic isolators, power injectors, cable splices, terminating resisto
32、rs and transfer points, but excluding coaxial cables and receiver leads (see 5.2). This standard covers the frequency range 5 MHz to 3 000 MHz; identifies performance requirements for certain parameters; lays down data publication requirements for certain parameters; stipulates methods of measuremen
33、ts; introduces minimum requirements defining quality grades. There are three grades for all passive equipment except system outlets where there is only one. Different networks require the same performance and, when integrating networks, upgrading will be avoided. Practical experience has shown that
34、these three grades meet most of the technical requirements necessary for supplying a minimum signal quality to the subscribers. This classification should not be considered as a requirement but as information for users and manufacturers on the minimum quality criteria of the material required to ins
35、tall networks of different sizes. The system operator should select appropriate material to meet the minimum signal quality at the subscribers outlet and to optimize cost/performance, taking into account the size of the network and local circumstances. All requirements and published data should be u
36、nderstood as guaranteed values within the specified frequency range and in well-matched conditions. 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 late
37、st edition of the referenced document (including any amendments) applies. IEC 60068 (all parts), Environmental testing IEC 60417, Graphical symbols for use on equipment NOTE IEC 60417 can be consulted on the IEC website. IEC 60529, Degrees of protection provided by enclosures (IP Code) BS EN 60728-4
38、:2008 6 IEC 60617, Graphical symbols for diagrams IEC 60728 (all parts), Cable networks for television signals, sound signals and interactive services NOTE The title of some of the parts of the IEC 60728 series will be changed when a new edition is published. IEC 60966-1, Radio frequency and coaxial
39、 cable assemblies Part 1: Generic specification General requirements and test methods IEC 60966-2-4, Radio frequency and coaxial cable assemblies Part 2-4: Detail specification for cable assemblies for radio and TV receivers Frequency range 0 to 3 000 MHz, IEC 61169-2 connectors IEC 60966-2-5, Radio
40、 frequency and coaxial cable assemblies Part 2-5: Detail specification for cable assemblies for radio and TV receivers Frequency range 0 to 1 000 MHz, IEC 61169-2 connectors IEC 60966-2-6, Radio frequency and coaxial cable assemblies Part 2-6: Detail specification for cable assemblies for radio and
41、TV receivers Frequency range 0 to 3 000 MHz, IEC 61169-24 connectors IEC 61000-4-5, Electromagnetic compatibility (EMC) Part 4-5: Testing and measurement techniques Surge immunity test IEC 61000-6-1, Electromagnetic compatibility (EMC) Part 6-1: Generic standards Immunity for residential, commercial
42、 and light-industrial environments IEC 61169-1, Radio-frequency connectors Part 1: Generic specification General require-ments and measuring methods IEC 61169-2, Radio-frequency connectors Part 2: Sectional specification Radio-frequency coaxial connectors of type 9,52 IEC 61169-24, Radio-frequency c
43、onnectors Part 24: Sectional specification Radio- frequency coaxial connectors with screw coupling, typically for use in 75 ohm cable distribution systems (type F) 3 Terms, definitions, symbols and abbreviations 3.1 Terms and definitions For the purposes of this document, the following terms and def
44、initions apply. NOTE Some terms have been taken from IEC 60050-723. 3.1.1 active equipment equipment (for example, amplifiers, converters, etc), performing signal processing by means of external or internal power supply in a certain frequency range 3.1.2 amplitude frequency response gain or loss of
45、an equipment or system plotted against frequency BS EN 60728-4:2008 7 3.1.3 attenuation ratio of the input power to the output power of an equipment or system, usually expressed in decibels 3.1.4 decibel ratio ten times the logarithm of the ratio of two quantities of power, P1and P2, i.e. dB21PPlg10
46、 (1) 3.1.5 directional coupler tap passive signal splitting equipment, with minimum signal loss between the input port and the output port (through-loss), a specified coupling loss between the input port and the tap port (tap loss), and very high loss between the output port and tap port (isolation)
47、 IEV 723-09-25, modified 3.1.6 directivity attenuation between output port and interface or tap port, minus the attenuation between input and interface or tap port, of any equipment or system 3.1.7 EM-active equipment all passive and active equipment carrying RF signals are considered as EM-active e
48、quipment, either because they are liable to cause electromagnetic disturbances or because the performance of them is liable to be affected by such disturbances 3.1.8 equalizer equipment designed to compensate over a certain frequency range for the amplitude/frequency distortion or phase/frequency di
49、stortion introduced by feeders or equipment NOTE This equipment is for the compensation of linear distortions only. 3.1.9 feeder transmission path forming part of a cable network. Such a path may consist of a metallic cable, optical fibre, wave guide or any combination of them. By extension, the term is also applied to paths containing one or more radio links IEV 723-09-12, modified 3.1.10 grade classification of performance for equipment
