1、BSI Standards PublicationCable networks for television signals, sound signals and interactive servicesPart 1-2: Performance requirements for signals delivered at the system outlet in operationBS EN 60728-1-2:2014National forewordThis British Standard is the UK implementation of EN 60728-1-2:2014. It
2、 is identical to IEC 60728-1-2:2014. It supersedes BS EN 60728-1-2:2009 which is withdrawn.The UK participation in its preparation was entrusted by Technical Com-mittee EPL/100, Audio, video and multimedia systems and equipment, to Subcommittee EPL/100/4, Cable distribution equipment and systems.A l
3、ist of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards L
4、imited 2014ISBN 978 0 580 79844 3ICS 33.120.10; 33.160; 35.110Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2014.Amendments/corrigenda issued since
5、publicationDate Text affectedBRITISH STANDARDBS EN 60728-1-2:2014EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 60728-1-2 August 2014 ICS 33.120.10; 33.160; 35.110 Supersedes EN 60728-1-2:2009 English Version Cable networks for television signals, sound signals and interactive services - Part 1-2
6、: Performance requirements forsignals delivered at the system outlet in Operation (IEC 60728-1-2:2014) Rseaux de distribution par cbles pour signaux detlvision, signaux de radiodiffusion sonore et services interactifs - Partie 1-2: Exigences de performance relatives aux signaux dlivrs la prise termi
7、nale en fonctionnement(CEI 60728-1-2:2014) Kabelnetze fr Fernsehsignale, Tonsignale und interaktiveDienste - Teil 1-2: Leistungsanforderungen an Signale der Teilnehmeranschlussdose im realen Betrieb(IEC 60728-1-2:2014) This European Standard was approved by CENELEC on 2014-04-11. CENELEC members are
8、 bound to comply with the CEN/CENELEC Internal Regulations which 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 t
9、he CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, 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 CEN-CENELEC Manage
10、ment Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Irel
11、and, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation ElectrotechniqueEuropisches Komi
12、tee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60728-1-2:2014 E EN 60728-1-2:2014 - 2 - Foreword The text of document 100/2246/F
13、DIS, future edition 2 of IEC 60728-1-2, 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 to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60728-1-
14、2:2014. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-02-28 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 20
15、17-04-11 This document supersedes EN 60728-1-2:2009. EN 60728-1-2:2014 includes the following significant technical changes with respect to EN 60728 1-2:2009: - update of performance requirements in Clause 7 to include those for DVB-T2 signals. This standard is to be used in conjunction with EN 6072
16、8-1:2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60728-1-2:2014
17、 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC 60728-10 NOTE Harmonized as EN 60728-10. BS EN 60728-1-2:2014- 3 - EN 60728-1-2:2014 Annex ZA (normative) Normative
18、references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, t
19、he latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed i
20、n this annex is available here: www.cenelec.eu Publication Year Title EN/HD Year IEC 60050-705 - International Electrotechnical Vocabulary (IEV) - Chapter 705: Radio wave propagation - - IEC 60050-712 - International Electrotechnical Vocabulary (IEV) - Chapter 712: Antennas - - IEC 60050-725 - Inter
21、national Electrotechnical Vocabulary (IEV) - Chapter 725: Space radiocommunications - - IEC 60728-1 2014 Cable networks for television signals, sound signals and interactive services - Part 1: System performance of forward paths EN 60728-1 2014 IEC 60728-1-1 2014 Cable networks for television signal
22、s sound signals and interactive services - Part 1-1: RF cabling for two way home networks EN 60728-1-1 2014 IEC 60728-3 2010 Cable networks for television signals, sound signals and interactive services - Part 3: Active wideband equipment for cable networks EN 60728-3 2011 IEC 60966-2-4 - Radio freq
23、uency and coaxial cable assemblies - Part 2-4: Detail specification for cable assemblies for radio and TV receivers - Frequency range 0 MHz to 3 000 MHz, IEC 61169-2 connectors EN 60966-2-4 - IEC 60966-2-5 - Radio frequency and coaxial cable assemblies - Part 2-5: Detail specification for cable asse
24、mblies for radio and TV receivers - Frequency range 0 MHz to 1 000 MHz, IEC 61169-2 connectors EN 60966-2-5 - BS EN 60728-1-2:2014EN 60728-1-2:2014 - 4 - Publication Year Title EN/HD Year IEC 60966-2-6 - Radio frequency and coaxial cable assemblies - Part 2-6: Detail specification for cable assembli
25、es for radio and TV receivers - Frequency range 0 MHz to 3 000 MHz, IEC 61169-24 connectors EN 60966-2-6 - ITU-R Recommendation BT.500 - Methodology for the subjective assessment of the quality of television pictures - - ITU-R Recommendation BT.654 - Subjective quality of television pictures in rela
26、tion to the main impairments of the analogue composite television signal - - ITU-R Recommendation BT.655 - Radio-frequency protection ratios for AM vestigial sideband terrestrial television systems interfered with by unwanted analogue vision signals and their associated sound signals - - ITU-T Recom
27、mendation J.61 - Transmission performance of television circuits designed for use in international connections - - ITU-T Recommendation J.63 - Insertion of test signals in the field-blanking interval of monochrome and colour television signals - - ETSI EN 300 421 - Digital Video Broadcasting (DVB):
28、Framing structure, channel coding and modulation for 11/12 GHz satellite services - - ETSI EN 300 429 - Digital Video Broadcasting (DVB): Framing structure, channel coding and modulation for cable systems - - ETSI EN 300 473 - Digital Video Broadcasting (DVB): Satellite Master Antenna Television (SM
29、ATV) distribution systems - - ETSI EN 300 744 - Digital Video Broadcasting (DVB): Framing structure, channel coding and modulation for digital terrestrial television - - ETSI EN 302 307 - Digital Video Broadcasting (DVB);Second generation framing structure, channel coding and modulation systems for
30、Broadcasting, Interactive Services, News Gathering and other broadband satellite applications (DVB-S2) - - ETSI EN 302 755 - Digital Video Broadcasting (DVB); Frame structure channel coding and modulation for a second generation digital terrestrial television broadcasting system (DVB-T2) - - BS EN 6
31、0728-1-2:2014 2 IEC 60728-1-2:2014 IEC 2014 CONTENTS INTRODUCTION . 6 1 Scope 9 2 Normative references 9 3 Terms, definitions, symbols and abbreviations . 10 3.1 Terms and definitions . 10 3.2 Abbreviations . 17 4 Methods of measurement 18 5 Subjective quality of television pictures in relation to t
32、he main impairments of the analogue composite television signal . 19 5.1 Subjective quality scale 19 5.2 Subjective quality and objective parameters . 20 6 Summation of the impairments 23 6.1 Impairments to be summed 23 6.2 Summation laws . 23 General 23 6.2.1Voltage addition 23 6.2.2Power addition
33、24 6.2.36.3 Examples . 24 7 Performance requirements in operation . 24 7.1 General 24 7.2 Impedance . 25 7.3 Performance requirements at the terminal input . 25 Definition 25 7.3.1Signal level . 25 7.3.2Other parameters . 25 7.3.37.4 Performance requirements at system outlets 25 Minimum and maximum
34、carrier levels . 25 7.4.1Mutual isolation between system outlets . 26 7.4.2Isolation between individual outlets in one household . 26 7.4.3Isolation between forward and return path 26 7.4.4Long-term frequency stability of distributed carrier signals at 7.4.5any system outlet 26 Carrier level differe
35、nces at system outlet 26 7.4.6Frequency response within a television channel . 26 7.4.7Random noise at system outlet . 26 7.4.8Interference to television channels 29 7.4.9Annex A (normative) RF carrier to noise ratio 31 A.1 AM-VSB modulated signals 31 A.1.1 General 31 A.1.2 Definition 31 A.1.3 TV re
36、ceiver IF filtering process . 31 A.1.4 Equivalent noise bandwidth 31 A.1.5 AM demodulation process . 32 A.2 FM modulated signals 33 BS EN 60728-1-2:2014IEC 60728-1-2:2014 IEC 2014 3 Annex B (informative) Examples of summation of impairments. 34 B.1 Voltage addition . 34 B.2 Power addition . 34 Bibli
37、ography 36 Figure 1 CATV/MATV/SMATV cable network Performance requirements 7 Figure 2 Examples of location of HNI for various home network types 14 Figure 3 Signal to echo ratio (dB) versus echo delay (s) 22 Figure A.1 Example of a TV receiver IF filter (systems B and G) 31 Figure A.2 Example of a d
38、emodulated TV signal (systems B and G) 32 Table 1 Methods of measurement of IEC 60728-1 applicable in operation 19 Table 2 Impairment units versus subjective quality . 20 Table 3 Impairment grade versus un-weighted white noise 21 Table 4 Impairment grade versus differential gain 21 Table 5 Impairmen
39、t grade versus differential phase . 21 Table 6 Impairment grade versus short time linear distortion (2T pulse) . 21 Table 7 Impairment grade versus chrominance-luminance gain inequality 21 Table 8 Impairment grade versus chrominance-luminance delay inequality 22 Table 9 Impairment grade versus echo
40、rating (1 s echo delay) . 22 Table 10 Correction factors to be applied for delays different from 1 s . 22 Table 11 Carrier-to-noise ratios at system outlet (analogue television) in operation 27 Table 12 RF signal-to-noise ratios at system outlet (digital television) in operation . 27 Table 13 Carrie
41、r-to-noise ratios at system outlet (sound radio) in operation . 29 Table B.1 Examples of voltage addition . 34 Table B.2 Examples of power addition . 35 BS EN 60728-1-2:2014 6 IEC 60728-1-2:2014 IEC 2014 INTRODUCTION Standards and deliverables of the IEC 60728 series deal with cable networks includi
42、ng equipment and associated methods of measurement for headend reception, processing and distribution of television and sound signals, and for processing, interfacing and transmitting all kinds of data signals for interactive services using all applicable transmission media. These signals are typica
43、lly transmitted in networks by frequency-multiplexing techniques. This includes for instance regional and local broadband cable networks, extended satellite and terrestrial television distribution systems, individual satellite and terrestrial television receiving systems, and all kinds of equipment,
44、 systems and installations used in such cable networks, distribution and receiving systems. The 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 of the customer premises equip
45、ment. The standardization work will consider coexistence with users of the RF spectrum in wired and wireless transmission systems. 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 acces
46、sories thereof is excluded. The reception of television signals inside a building requires an outdoor antenna and a distribution network to convey the signal to the TV receivers. In a building divided into apartment blocks, the signals received by the antennas are distributed by the MATV/SMATV cable
47、 network up to the home network interface (HNI). The television signals are then distributed (inside the home) by home networks (HN) of various types up to the system outlet or terminal input. The cable network can support two way operation, from the system outlet (or terminal input) towards the hea
48、dend. The home network can use coaxial cables, balanced pair cables, fibre optic cables (glass or plastic) and also wireless links inside a room (or a small number of adjacent rooms) to replace wired cords. IEC 60728-1-2 (this standard) deals with the requirements to be fulfilled at the system outle
49、t or terminal input, when the CATV/MATV/SMATV system is in operation. These performance requirements for signals at the system outlet or terminal input in operation are derived from considerations of the characteristics of the received signals at the input of the headend (see Clause 6 of IEC 60728-1:2014) and the summation of the impairments produced by the headend, the CATV/MATV/SMATV network and the home network, when the requirements given in IEC 60728-1:
