1、 IEC TR 60728-3-2 Edition 1.0 2016-10 TECHNICAL REPORT Cable networks for television signals, sound signals and interactive services Part 3-2: Method of measurement of 5 thorder non-linearity for active electronic equipment using five carriers IEC TR 60728-3-2:2016-10(en) colour inside THIS PUBLICAT
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11、ble networks for television signals, sound signals and interactive services Part 3-2: Method of measurement of 5 thorder non-linearity for active electronic equipment using five carriers INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.060.40; 33.170 ISBN 978-2-8322-3646-8 Registered trademark of th
12、e International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC TR 60728-3-2:2016 IEC 2016 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 7 2 Normative references. 7 3 Terms, definitions, symbols and abbreviated te
13、rms . 7 3.1 Terms and definitions 7 3.2 Symbols 9 3.3 Abbreviated terms . 9 4 Method of measurement of 5 thorder non-linearity for active electronic equipment using five carriers 10 4.1 General . 10 4.2 Equipment required . 11 4.3 Connection of the equipment . 11 4.4 Measurement procedure for 3 rdor
14、der and 5 thorder intermodulation products 11 4.5 Measurement procedure for 2 ndorder intermodulation products . 13 4.6 Presentation of the results . 13 4.7 Estimated maximum usable output level with a higher number of channels . 14 4.8 Setting of the 5 carriers frequencies for narrow-band equipment
15、 14 5 Equipment characteristics required to be published 14 6 Example of measurement results . 15 Annex A (informative) Examples of measurement frequencies for channel spacing of 7 MHz and 8 MHz . 16 A.1 Wide-band equipment . 16 A.1.1 General . 16 A.1.2 Operating frequency range: VHF 16 A.1.3 Operat
16、ing frequency range: UHF 16 A.2 Narrow-band equipment 17 A.2.1 General . 17 A.2.2 Operating frequency range: VHF 17 A.2.3 Operating frequency range: UHF 17 Annex B (informative) Examples of measurement frequencies for channel spacing of 6 MHz. 20 B.1 Wide-band equipment . 20 B.1.1 General . 20 B.1.2
17、 Operating frequency range: VHF 20 B.1.3 Operating frequency range: UHF 20 B.2 Narrow-band equipment 21 B.2.1 General . 21 B.2.2 Operating frequency range: VHF 21 B.2.3 Operating frequency range: UHF 21 Bibliography . 24 Figure 1 Measurement configuration with 5 carriers 11 Figure 2 The five carrier
18、s equally spaced at distance D and the intermodulation products . 12 IEC TR 60728-3-2:2016 IEC 2016 3 Figure 3 Example of measurement results using the measuring method with 5 carriers . 15 Table A.1 Allocation of measurement carrier frequencies (MHz) and intermodulation products in VHF Band III 16
19、Table A.2 Allocation of measurement carrier frequencies (MHz) and intermodulation products in UHF Band IV 16 Table A.3 Allocation of measurement carrier frequencies (MHz) and intermodulation products in UHF Band V (Low part) 16 Table A.4 Allocation of measurement carrier frequencies (MHz) and interm
20、odulation products in UHF Band V (High part) . 17 Table A.5 Allocation of measurement carrier frequencies (MHz) and intermodulation products in VHF Band III, narrow-band equipment 17 Table A.6 Allocation of measurement carrier frequencies (MHz) and intermodulation products in UHF Band IV, narrow-ban
21、d equipment 18 Table A.7 Allocation of measurement carrier frequencies (MHz) and intermodulation products in UHF Band V, narrow-band equipment . 19 Table B.1 Allocation of measurement carrier frequencies (MHz) and intermodulation products in VHF Band III 20 Table B.2 Allocation of measurement carrie
22、r frequencies (MHz) and intermodulation products in UHF Band IV 20 Table B.3 Allocation of measurement carrier frequencies (MHz) and intermodulation products in UHF Band V (Low part) 20 Table B.4 Allocation of measurement carrier frequencies (MHz) and intermodulation products in UHF Band V (High par
23、t) . 21 Table B.5 Allocation of measurement carrier frequencies (MHz) and intermodulation products in VHF Band III, narrow-band equipment 21 Table B.6 Allocation of measurement carrier frequencies (MHz) and intermodulation products in UHF Band IV, narrow-band equipment 22 Table B.7 Allocation of mea
24、surement carrier frequencies (MHz) and intermodulation products in UHF Band V, narrow-band equipment . 23 4 IEC TR 60728-3-2:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ CABLE NETWORKS FOR TELEVISION SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICES Part 3-2: Method of measurement of 5 th
25、order non-linearity for active electronic equipment using five carriers 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 promote inter
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36、 International Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. IEC TR 60728-3-2, which is a technical report,
37、 has been prepared by technical area 5: Cable networks for television signals, sound signals and interactive services, of IEC technical committee 100: Audio, video and multimedia systems and equipment. IEC TR 60728-3-2:2016 IEC 2016 5 The text of this technical report is based on the following docum
38、ents: Enquiry draft Report on voting 100/2708/DTR 100/2761/RVC Full information on the voting for the approval of this technical report can be found in the report on voting indicated in the above table. The list of all parts of the IEC 60728 series, under the general title, Cable networks for televi
39、sion signals, sound signals and interactive services, can be found on the IEC website. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC we
40、bsite under “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the document will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour inside logo on the cover
41、 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 this document using a colour printer. 6 IEC TR 60728-3-2:2016 IEC 2016 INTRODUCTION Standards and deliverables of the IEC 60728 s
42、eries deal with cable networks including 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 transm
43、ission media. These signals are typically 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 receiv
44、ing systems, and all kinds of equipment, 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 termi
45、nal input of the equipment on the customers premises. 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
46、 coaxial, balanced and optical cables and accessories thereof is excluded. IEC TR 60728-3-2:2016 IEC 2016 7 CABLE NETWORKS FOR TELEVISION SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICES Part 3-2: Method of measurement of 5 thorder non-linearity for active electronic equipment using five carriers 1 S
47、cope This part of IEC 60728 is applicable to the measurement of 5 thorder non-linearity for active electronic equipment which carries only digitally modulated television signals, sound signals and signals for interactive services. This method of measurement is specifically applicable to MATV install
48、ations but could be applied to broadband and channel selective amplifiers used in all kinds of cable networks. NOTE 1 The methods of measurement of non-linearity (intermodulation products) applicable to active equipment, when loaded with analogue signals, considered that third order intermodulation
49、products were the most important ones. The new era of television digital signals, transmitted according to DVB-S/S2, DVB-C/C2 and DVB-T/T2 modulation formats, has shown that the non-linear distortions (intermodulation products) in active equipment, when loaded with digital signals, are significant up to the 5 thorder. NOTE 2 With this method of measurement it is possible to obtain information on non-linear distortions (intermodulation products)
