1、 IEC 62272-2 Edition 1.0 2007-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Digital radio mondiale (DRM) Part 2: Digital radio in the bands below 30 MHz Methods of measurement for DRM transmitters Digital radio mondiale (DRM) Partie 2: Radiodiffusion numrique sur des bandes infrieures 30 MHz Mthode
2、s de mesure applicables aux metteurs DRM IEC 62272-2:2007 colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic o
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16、ous: csciec.ch. IEC 62272-2 Edition 1.0 2007-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Digital radio mondiale (DRM) Part 2: Digital radio in the bands below 30 MHz Methods of measurement for DRM transmitters Digital radio mondiale (DRM) Partie 2: Radiodiffusion numrique sur des bandes infrieure
17、s 30 MHz Mthodes de mesure applicables aux metteurs DRM INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE R ICS 33.060.20 PRICE CODE CODE PRIX ISBN 978-2-88912-904-1 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission
18、 Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. colour inside 2 62272-2 IEC:2007 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative refer
19、ences 5 3 Terms, definitions and abbreviations . 6 3.1 Terms and definitions 6 3.2 Abbreviations . 6 4 General conditions of operation . 7 5 General conditions of measurement 7 5.1 Input and output measurement arrangements 7 5.2 Temperature and humidity . 8 5.3 Conditions for primary power supply .
20、8 5.4 Output power . 8 6 General characteristics . 8 6.1 Output power . 8 6.2 Frequency . 9 7 Transmission performance characteristics 11 7.1 Spurious emissions 11 7.2 Out-of-band emissions (spectrum mask) 12 7.3 Modulation error ratio (MER) 13 7.4 Bit error ratio (BER) . 13 8 Protection against atm
21、ospheric discharge . 14 9 Acoustic noise 14 10 Safety . 15 Annex A (informative) Measuring arrangements 16 Annex B (informative) Out-of-band emission limits for DRM transmitters . 18 Annex C (informative) Additional measuring details 20 Figure 1 Spectrum occupancy for 9 kHz channels . 10 Figure 2 Sp
22、ectrum occupancy for 10 kHz channels . 10 Figure 3 PRBS generator . 14 Figure A.1 Arrangement A 16 Figure A.2 Arrangement B 16 Figure A.3 Arrangement C 17 Figure A.4 Arrangement D 17 Figure B.1 Out-of-band emission limits (upper half only of a symmetrical spectrum mask shown) . 18 Table B.1 Out-of-b
23、and emission limits 18 62272-2 IEC:2007 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ DIGITAL RADIO MONDIALE (DRM) Part 2: Digital radio in the bands below 30 MHz Methods of measurement for DRM transmitters FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization f
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34、272-2 has been prepared by IEC technical committee 103: Transmitting equipment for radiocommunication. This bilingual version (2012-05) corresponds to the monolingual English version, published in 2007-03. The text of this standard is based on the following documents: FDIS Report on voting 103/64/FD
35、IS 103/66/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. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 4 62272-2 IEC:2007 The committee has decided that the contents of thi
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37、lour inside logo on the cover 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. 62272-2 IEC:2007 5 DIGITAL RADIO MONDIALE (DRM) Part 2: Digita
38、l radio in the bands below 30 MHz Methods of measurement for DRM transmitters 1 Scope This part of IEC 62272 describes the methods of measurement to assess the performance characteristics of digital modulated radio transmitters in the bands below 30 MHz for sound and/or data broadcasting in the LF,
39、MF and HF bands, and to facilitate the comparison of measurements which are carried out by different personnel. It contains details of specially selected methods for determining the most important performance parameters of digital radio transmitters. The measurement methods described apply to a limi
40、ted number of performance parameters, i.e. those which can give rise to ambiguous interpretation due to the use of different methods and conditions. They are neither restrictive nor mandatory: measurements can be chosen for each particular case. The measurement methods described in this standard are
41、 intended to be used for type approval tests, quality control tests or acceptance test measurements in factories and on site. Fewer or additional measurements may be carried out by agreement between customer and supplier. Any additional test should comply with standards which have been established b
42、y other study groups, subcommittees of the IEC or other international or suitably accredited organizations. This standard does not specify limiting values for acceptable performance as these are usually given in the equipment specification or in requirements laid down by the responsible regulation b
43、odies. However, some values are quoted, where appropriate, for guidance in the presentation of the results. 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,
44、the latest edition of the referenced document (including any amendments) applies. IEC 60244-1, Methods of measurement for radio transmitters Part 1: General characteristics for broadcast transmitters IEC 60244-15, Methods of measurement for radio transmitters Part 15: Amplitude-modulated transmitter
45、s for sound broadcasting IEC 60215, Safety requirements for radio transmitting equipment ITU Radio Regulations ITU-R Recommendation V.663, Use of certain terms linked with physical quantities 6 62272-2 IEC:2007 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this
46、 document, the following terms and definitions apply. 3.1.1 DRM standard digital modulation standard for frequencies in the bands below 30 MHz for the purposes of audio and data broadcasting 3.1.2 DRM transmitters sound broadcasting transmitters operating in the bands below 30 MHz and incorporating
47、digital modulation in accordance with IEC 62272-1 13.1.3 power definitions nominal output power is the continuous DRM mean power for which the transmitter is designed maximum output power is the maximum possible continuous DRM mean power which the transmitter can deliver. The maximum output power mi
48、ght be concordant with the nominal output power minimum output power is the minimum possible continuous DRM mean power for which the transmitter is designed 3.1.4 necessary bandwidth for a given class of emission, the width of a frequency band which is just sufficient to ensure the transmission of i
49、nformation at the rate and with the quality required under specified conditions (ITU definition) For the practical purposes of this standard, the necessary bandwidth for a DRM signal can be considered to be the same as the allocated channel bandwidth, for example, 10 Hz for a standard HF channel. 3.2 Abbreviations BER Bit Error Ratio BS Broadcasting Service DRM Digital Radio Mondiale FAC Fast Access Channel H
