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1、BRITISH STANDARD BS EN 62272-2:2007 Digital radio mondiale (DRM) Part 2: Digital radio in the bands below 30 MHz Methods of measurement for DRM transmitters The European Standard EN 62272-2:2007 has the status of a British Standard ICS 33.060.20 ? Licensed Copy: London South Bank University, London
2、South Bank University, Fri Jun 01 01:42:20 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 62272-2:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2007 BSI 2007 ISBN 978 0 580 50825 7 National foreword This British Standard was p
3、ublished by BSI. It is the UK implementation of EN 62272-2:2007. It is identical with IEC 62272-2:2007. The UK participation in its preparation was entrusted to Technical Committee EPL/103, Transmitting equipment for radio communication. A list of organizations represented on this committee can be o
4、btained 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 issued since publication Amd.
5、No. DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Jun 01 01:42:20 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 62272-2 NORME EUROPENNE EUROPISCHE NORM April 2007 CENELEC European Committee for Electrotechnical Standardization Comit Eur
6、open de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62272-2:2007 E ICS 33.060.20 E
7、nglish version Digital radio mondiale (DRM) - Part 2: Digital radio in the bands below 30 MHz - Methods of measurement for DRM transmitters (IEC 62272-2:2007) Digital radio mondiale (DRM) - Partie 2: Radiodiffusion numrique dans les bandes de frquences en dessous de 30 MHz - Mthodes de mesure des me
8、tteurs DRM (CEI 62272-2:2007) Digital radio mondiale (DRM) - Teil 2: Digitaler Rundfunk in den Bndern unterhalb 30 MHz - Messverfahren fr DRM-Sender (IEC 62272-2:2007) This European Standard was approved by CENELEC on 2007-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regu
9、lations 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 Central Secretariat or to any CENELEC member. Th
10、is 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 Central Secretariat has the same status as the official versions. CENELEC membe
11、rs are the national electrotechnical 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, Sloveni
12、a, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: London South Bank University, London South Bank University, Fri Jun 01 01:42:20 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 62272-2:2007 2 Foreword The text of document 103/64/FDIS, future edition 1 of IEC 62272-2, prepared by IE
13、C TC 103, Transmitting equipment for radio communication, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62272-2 on 2007-04-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical nationa
14、l standard or by endorsement (dop) 2008-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-04-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62272-2:2007 was approved by CENELEC as a Europe
15、an Standard without any modification. _ Licensed Copy: London South Bank University, London South Bank University, Fri Jun 01 01:42:20 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 3 EN 62272-2:2007 CONTENTS 1 Scope 4 2 Normative references .4 3 Terms, definitions and abbreviations.5 3.1 Terms and defi
16、nitions 5 3.2 Abbreviations 5 4 General conditions of operation 6 5 General conditions of measurement6 5.1 Input and output measurement arrangements 6 5.2 Temperature and humidity .7 5.3 Conditions for primary power supply 7 5.4 Output power.7 6 General characteristics.7 6.1 Output power.7 6.2 Frequ
17、ency.8 7 Transmission performance characteristics 10 7.1 Spurious emissions .10 7.2 Out-of-band emissions (spectrum mask) 11 7.3 Modulation error ratio (MER) .12 7.4 Bit error ratio (BER).12 8 Protection against atmospheric discharge.13 9 Acoustic noise14 10 Safety 14 Annex A (informative) Measuring
18、 arrangements .15 Annex B (informative) Out-of-band emission limits for DRM transmitters.17 Annex C (informative) Additional measuring details19 Annex ZA (normative) Normative references to international publications with their corresponding European publications .20 Figure 1 Spectrum occupancy for
19、9 kHz channels 9 Figure 2 Spectrum occupancy for 10 kHz channels 9 Figure 3 PRBS generator.13 Figure A.1 Arrangement A15 Figure A.2 Arrangement B15 Figure A.3 Arrangement C .16 Figure A.4 Arrangement D .16 Figure B.1 Out-of-band emission limits (upper half only of a symmetrical spectrum mask shown)
20、17 Table B.1 Out-of-band emission limits17 Licensed Copy: London South Bank University, London South Bank University, Fri Jun 01 01:42:20 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 62272-2:2007 4 DIGITAL RADIO MONDIALE (DRM) Part 2: Digital radio in the bands below 30 MHz Methods of measurement f
21、or 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, MF and HF bands, and to facilitate the comparison of measu
22、rements 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 limited number of performance parameters, i.e. those which can
23、 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 intended to be used for type approval tests, quality cont
24、rol 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 by other study groups, subcommittees of the IEC or other in
25、ternational 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 bodies. However, some values are quoted, where appropriate,
26、 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, the latest edition of the referenced document (including a
27、ny 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 transmitters for sound broadcasting IEC 60215, Safety requirements f
28、or radio transmitting equipment ITU Radio Regulations ITU-R Recommendation V.663, Use of certain terms linked with physical quantities Licensed Copy: London South Bank University, London South Bank University, Fri Jun 01 01:42:20 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 5 EN 62272-2:2007 _ 3 Terms
29、, definitions and abbreviations 3.1 Terms and definitions For the purposes of this 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 soun
30、d broadcasting transmitters operating in the bands below 30 MHz and incorporating digital modulation in accordance with IEC 62272-11 3.1.3 power definitions nominal output power is the continuous DRM mean power for which the transmitter is designed maximum output power is the maximum possible contin
31、uous DRM mean power which the transmitter can deliver. The maximum output power might 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
32、width of a frequency band which is just sufficient to ensure the transmission of information 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
33、 the allocated channel bandwidth, for example, 10 kHz for a standard HF channel. 3.2 Abbreviations BER Bit Error Ratio BS Broadcasting Service DRM Digital Radio Mondiale FAC Fast Access Channel HF High Frequency IEC International Electrotechnical Commission ISO International Organization for Standar
34、dization ITU International Telecommunications Union ITU-R International Telecommunications Union Radiocommunications Sector LF Low Frequency MER Modulation Error Ratio MF Medium Frequency MLC Multi-Level Coding MSC Main Service Channel 1 IEC 62272-1, Digital radio mondiale Part 1: System specificati
35、on Licensed Copy: London South Bank University, London South Bank University, Fri Jun 01 01:42:20 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 62272-2:2007 6 OFDM Orthogonal Frequency Division Multiplex PRBS Pseudo-Random Bit Sequence QAM Quadrature Amplitude Modulation RF Radiofrequency SDC Servic
36、e Description Channel SM Spectrum Management Tx Transmitter 4 General conditions of operation Any device for the suppression of unwanted signals, irrespective of whether or not the device is located inside the transmitter, shall be considered as part of the transmitter for the purposes of this stand
37、ard. Feeders and antennas to which the transmitter might be connected are not considered part of the transmitter and therefore excluded. Unless otherwise specified, the measurements shall be made under normal operating and environmental conditions and at the nominal output power. If required, they s
38、hall be repeated under extreme operating and environmental conditions and at any lower output power in accordance with the equipment specification. The transmitting mode and the measured output power of the transmitter under test shall be stated. The mains supply and the environmental conditions sha
39、ll be stated with the measurement results. The transmitter shall be connected to a test load having a VSWR relative to the nominal load impedance of the transmitter not greater than 1,2:1 at frequencies within the designated broadcast band; 1,5:1 at all frequencies outside the designated broadcast b
40、and up to a frequency of 10 times the highest frequency in the designated band. If the transmitter includes devices to control the frequency band transmitted, all the characteristics shall be measured with the devices in the circuit. Measurement uncertainty should be calculated and techniques employ
41、ed to minimize its range. This uncertainty should be applied to the limit and any measurement falling below the range is deemed acceptable. If a digital transmitter can also operate in analogue mode, the requirements of IEC 60244-1 and IEC 60244-15 shall also apply, in addition to the requirements o
42、f this standard. 5 General conditions of measurement 5.1 Input and output measurement arrangements For the purposes of measurement, the input and output signal arrangements are given in the form of diagrams. Where required, the impedance of the test equipment of the transmitter under test and of all
43、 the connections between them shall be appropriately terminated, taking into account the transmitters specification and the termination impedance of any test equipment. Licensed Copy: London South Bank University, London South Bank University, Fri Jun 01 01:42:20 GMT+00:00 2007, Uncontrolled Copy, (
44、c) BSI 7 EN 62272-2:2007 These test procedures for DRM transmitters require that the test signals used shall conform to the DRM standard and that the measuring equipment is sufficiently accurate and has the necessary performance and dynamic range to provide error-free measurements of transmitter per
45、formance parameters. 5.2 Temperature and humidity Equipment to be measured shall be operated in an environment which meets the temperature and humidity requirements as defined in their technical specifications. Temperature and humidity must never be such as to cause condensation in or on the equipme
46、nt during measurements. In the absence of temperature and humidity requirements in the technical specifications, the provisions of IEC 60244-1 shall apply. 5.3 Conditions for primary power supply The measurements are carried out at the nominal voltage and the nominal frequency of the power supply gi
47、ven in the relevant equipment specification. During a series of measurements carried out as part of one test on one equipment, the voltage and frequency of the power supply shall be set at the nominal values indicated in the equipment specification. If called for in the specification and if the powe
48、r source is able to be adjusted, the test shall be repeated at the extremes of voltage and frequency stipulated in the specification. The conditions for primary power voltage and frequency shall be specified in the equipment specification. If no voltage or frequency range is specified, the tests sha
49、ll be carried out with voltage within 5 % of nominal and frequency within 2 % of nominal. 5.4 Output power The tests shall be carried out with the transmitter set to its nominal output power and, if required, also at any other output power within the equipment specification. 6 General characteristics 6.1 Output power 6.1.1 Definition For a digital signal with the OFDM modulation process the po