1、BSI Standards PublicationCable networks for television signals, sound signals and interactive servicesPart 5: Headend equipmentBS EN 60728-5:2016National forewordThis British Standard is the UK implementation of EN 60728-5:2016. It isidentical to IEC 60728-5:2015. It supersedes BS EN 60728-5:2008 wh
2、ich iswithdrawn.The UK participation in its preparation was entrusted by TechnicalCommittee EPL/100, Audio, video and multimedia systems and equipment,to Subcommittee EPL/100/4, Cable distribution equipment and systems.A list of organizations represented on this committee can be obtained onrequest t
3、o 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 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 82393 0ICS 33.060.40Compliance with a British Standa
4、rd cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60728-5:2016EUROPEAN STANDARD NORME EUROPENNE
5、EUROPISCHE NORM EN 60728-5 April 2016 ICS 33.060.40 Supersedes EN 60728-5:2008 English Version Cable networks for television signals, sound signals and interactive services - Part 5: Headend equipment (IEC 60728-5:2015) Rseaux de distribution par cbles pour signaux de tlvision, signaux de radiodiffu
6、sion sonore et services interactifs - Partie 5: quipements de tte de rseau (IEC 60728-5:2015) Kabelnetze fr Fernsehsignale, Tonsignale und interaktive Dienste - Teil 5: Gerte fr Kopfstellen (IEC 60728-5:2015) This European Standard was approved by CENELEC on 2016-01-13. CENELEC members are bound to
7、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 the CEN-CEN
8、ELEC 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 Management Centr
9、e 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, Ireland, Italy
10、, 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 Electrotechnique Europisches Komitee fr El
11、ektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60728-5:2016 E BS EN 60728-5:2016EN 60728-5:2016 2 European foreword The text of document
12、100/2555/FDIS, future edition 3 of IEC 60728-5, 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
13、60728-5:2016. 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) 2016-10-22 latest date by which the national standards conflicting with the document have to be withdrawn (d
14、ow) 2019-04-22 This document supersedes EN 60728-5:2008. 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 o
15、f the International Standard IEC 60728-5:2015 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60050 (series) NOTE Harmonized as EN 60050 (series). IEC 60130-9 NOT
16、E Harmonized as EN 60130-9. IEC 61169-2:2001 NOTE Harmonized as EN 61169-2:2001. IEC 61169-8 NOTE Harmonized as EN 61169-8. BS EN 60728-5:2016EN 60728-5:2016 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documen
17、ts, 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, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International
18、 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 in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60068-2-1 - Environment
19、al testing - Part 2-1: Tests - Test A: Cold EN 60068-2-1 - IEC 60068-2-2 - Environmental testing - Part 2-2: Tests - Test B: Dry heat EN 60068-2-2 - IEC 60068-2-14 - Environmental testing - Part 2-14: Tests - Test N: Change of temperature EN 60068-2-14 - IEC 60068-2-27 - Environmental testing - Part
20、 2-27: Tests - Test Ea and guidance: Shock EN 60068-2-27 - IEC 60068-2-30 - Environmental testing - Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle) EN 60068-2-30 - IEC 60068-2-31 - Environmental testing - Part 2-31: Tests - Test Ec: Rough handling shocks, primarily for equipment-ty
21、pe specimens EN 60068-2-31 - IEC 60068-2-40 - Basic environmental testing procedures - Part 2: Tests. Test Z/AM: Combined cold/low air pressure tests EN 60068-2-40 - IEC 60244-5 - Methods of measurement for radio transmitters - Part 5: Performance characteristics for television transmitters EN 60244
22、-5 - IEC 60529 - Degrees of protection provided by enclosures (IP Code) EN 60529 - IEC 60728-1 - Cable networks for television signals, sound signals and interactive services - Part 1: System performance of forward paths EN 60728-1 - IEC 60728-2 - Cable networks for television signals, sound signals
23、 and interactive services - Part 2: Electromagnetic compatibility for equipment EN 50083-2 - 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 60728-11 - Cable networks for televis
24、ion signals, sound signals and interactive services - Part 11: Safety EN 60728-11 - IEC 61319-1 - Interconnections of satellite receiving equipment - Part 1: Europe EN 61319-1 - ISO/IEC 13818-1 - Information technology - Generic coding of moving pictures and associated audio information - Part 1: Sy
25、stems - - ISO/IEC 13818-2 - Information technology - Generic coding of moving pictures and associated audio information - Part 2: Video - - BS EN 60728-5:2016EN 60728-5:2016 4 ISO/IEC 13818-3 - Information technology - Generic coding of moving pictures and associated audio information - Part 3: Audi
26、o - - ISO/IEC 13818-4 - Information technology - Generic coding of moving pictures and associated audio information - Part 4: Conformance testing - - ETSI EN 300 421 - Digital Video Broadcasting (DVB): Framing structure, channel coding and modulation for 11/12 GHz satellite services - - ETSI EN 300
27、429 - Digital Video Broadcasting (DVB): Framing structure, channel coding and modulation for cable systems - - ETSI EN 300 468 - Digital Video Broadcasting (DVB): Specification for Service Information (SI) in DVB systems - - ETSI EN 300 473 - Digital Video Broadcasting (DVB): Satellite Master Antenn
28、a Television (SMATV) 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 modulat
29、ion systems for 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
30、-T2) - - ETSI ETS 300 163 - Television systems; NICAM 728: transmission of two-channel digital sound with terrestrial television systems B, G, H, I, K1 and L - - ETSI TR 101 211 - Digital Video Broadcasting (DVB); Guidelines on implementation and usage of Service Information (SI) - - ITU-R Recommend
31、ation BS 468-4 - Measurement of audio-frequency noise voltage level in sound broadcasting (Vol. X-1) - - ITU-R Report 624-4 - Characteristics of television systems - - ITU-T Recommendation J.61 - Transmission performance of television circuits designed for use in international connections - - ITU-T
32、Recommendation J.101 - Measurement methods and test procedures for teletext signals - - BS EN 60728-5:2016EN 60728-5:2016 5 Annex ZB (normative) Special national conditions Special national condition: National characteristic or practice that cannot be changed even over a long period, e.g. climatic c
33、onditions, electrical earthing conditions. NOTE If it affects harmonization, it forms part of the European Standard / Harmonization Document. For the countries in which the relevant special national conditions apply these provisions are normative, for other countries they are informative. Clause Spe
34、cial national condition 5.3 Finland, Sweden All equipment installed in locations that are not temperature controlled shall meet the requirements within the temperature range -40 C to +55 C. BS EN 60728-5:2016 2 IEC 60728-5:2015 IEC 2015 CONTENTS FOREWORD . 9 INTRODUCTION . 11 1 Scope 12 2 Normative
35、references 15 3 Terms, definitions, symbols and abbreviations . 17 3.1 Terms and definitions 17 3.2 Symbols 21 3.3 Abbreviations 22 4 Methods of measurement 24 4.1 Methods of measurement for digitally modulated signals . 24 4.1.1 General . 24 4.1.2 Basic assumptions and measurement interfaces 24 4.1
36、.3 Signal level for digitally modulated signals . 24 4.2 Single-channel intermodulation specification for channel amplifier and frequency converter 26 4.3 Three-carrier intermodulation measurement 27 4.4 Two carrier intermodulation measurements for second- and third-order products 28 4.4.1 General .
37、 28 4.4.2 Intermodulation products with test signals at frequencies faand fb29 4.4.3 Signal levels 29 4.5 Carrier-to-spurious signal ratio at the output . 29 4.5.1 Carrier-to-spurious signal ratio at the output of equipment for AM TV systems . 29 4.5.2 Carrier-to-spurious signal ratio at the output
38、of equipment for FM TV systems . 30 4.5.3 Shoulder attenuation . 31 4.6 Signal-to-noise measurement 32 4.6.1 Television carrier-to-noise ratio (analogue modulated signals) . 32 4.6.2 RF signal-to-noise ratio (SD,RF/N) for digitally modulated signals . 35 4.7 Differential gain and phase for PAL/SECAM
39、 signals 36 4.7.1 General . 36 4.7.2 Differential gain (for PAL/SECAM only) 37 4.7.3 Differential phase 38 4.8 Group delay measurements 41 4.8.1 Group delay variation of analogue TV signals 41 4.8.2 Procedure for the measurement of group delay variation on DVB channel converters 42 4.9 Phase noise o
40、f an RF carrier. 45 4.9.1 General . 45 4.9.2 Equipment required . 45 4.9.3 Connection of the equipment . 46 4.9.4 Measurement procedure 46 4.9.5 Presentation of the results . 46 4.10 Hum modulation of carrier . 48 4.10.1 General . 48 4.10.2 Description of the method of measurement 48 BS EN 60728-5:2
41、016IEC 60728-5:2015 IEC 2015 3 4.10.3 Measuring procedure . 49 4.10.4 Calculating the hum modulation ratio . 50 4.11 2T-pulse response, K-factor 51 4.12 Chrominance-luminance delay inequalities (20T-pulse method) 52 4.13 Luminance non-linearity 54 4.14 Intermodulation distortion (FM stereo radio) 54
42、 4.14.1 General . 54 4.14.2 Equipment required . 55 4.14.3 Connection of equipment . 55 4.14.4 Measurement . 55 4.15 Decoding margin (teletext) 55 4.15.1 General . 55 4.15.2 Method of measurement and measuring set-up (Figure 31) 56 4.15.3 Applicability of measuring set-up . 56 5 Performance requirem
43、ents and recommendations . 56 5.1 Safety . 56 5.2 Electromagnetic compatibility 56 5.3 Environmental . 56 5.4 Marking . 57 5.4.1 Marking of equipment 57 5.4.2 Marking of ports . 57 6 Equipment characteristics required to be met 57 6.1 General . 57 6.2 Power supply voltage 58 6.3 RF signal requiremen
44、ts . 58 6.3.1 Impedance (input) 58 6.3.2 Impedance (output) 58 6.3.3 Return loss (input, output) of equipment 58 6.3.4 Return loss (output) of headend . 58 6.3.5 Typical back-off for digital against analogue signals 58 6.3.6 Immunity against other signals in the FM radio and TV range 59 6.3.7 Carrie
45、r-to-spurious-signals ratio at output in the frequency range of 40 MHz to 862 MHz . 59 6.3.8 Image rejection for AM TV and FM radio 60 6.3.9 Carrier to local oscillator signal ratio at the output for AM TV and FM radio 60 6.3.10 Frequency stability 60 6.3.11 Phase noise of digital modulated signals
46、at the output of the headend . 61 6.3.12 In-channel group delay variation for digital modulated signals . 62 6.3.13 In-channel peak-to-peak amplitude response variation for digitally modulated signals 63 6.3.14 Stability of sound intercarrier . 63 6.3.15 Stability of residual carrier amplitude . 63
47、6.3.16 Frequency stability SAT IF/IF converter 63 6.3.17 Typical modulation error ratio (MER) for a QAM signal 64 6.3.18 Minimum C/N values at the output of the headend . 64 6.4 Composite video signal requirements 64 6.4.1 Impedance . 64 6.4.2 Return loss 65 BS EN 60728-5:2016 4 IEC 60728-5:2015 IEC
48、 2015 6.4.3 Signal voltage 65 6.4.4 Polarity 65 6.4.5 Offset voltage 65 6.5 Audio signal requirements . 65 6.5.1 Input impedance 65 6.5.2 Output impedance . 65 6.5.3 Signal level 65 6.6 Requirements for decoding margin (teletext) . 66 6.7 IF signal requirements (AM-TV) 66 6.7.1 Impedance . 66 6.7.2
49、Return loss 66 6.8 Antennas for terrestrial reception 66 6.8.1 Impedance . 66 6.8.2 Return loss 66 6.9 Antenna amplifier 66 7 Equipment characteristics required to be published . 67 7.1 General . 67 7.2 Environmental conditions 67 7.3 Maximum permissible output level . 67 7.4 Operating range for output level 68 7.5 TV standard 68 7.6 Clamp . 68 7.7 Noise figure 68 7.7.1 Equipment without AGC . 68 7.7.2 Equipment with AGC 69 7.8 Data control signals, description of
