1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Part 1: Performance characteristics of terrestrial digital television transmittersThe European Stan
2、dard EN 62273-1:2007 has the status of a British StandardICS 33.060.20Methods of measurement for radio transmitters BRITISH STANDARDBS EN 62273-1:2007BS EN 62273-1:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2007 BSI 2007ISBN 9
3、78 0 580 50667 3Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. National forewordThis British Standard was published by BSI. It is the UK implementat
4、ion of EN 62273-1:2007. It is identical with IEC 62273-1:2007.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 obtained on request to its secretary.This pu
5、blication does not purport to include all the necessary provisions of a EUROPEAN STANDARD EN 62273-1 NORME EUROPENNE EUROPISCHE NORM April 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Nor
6、mung 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 62273-1:2007 E ICS 33.060.20 English version Methods of measurement for radio transmitters - Part 1: Performance
7、characteristics of terrestrial digital television transmitters (IEC 62273-1:2007) Mthodes de mesure applicables aux metteurs radiolectriques - Partie 1: Qualit de fonctionnement des metteurs de tlvision numrique terrestre (CEI 62273-1:2007) Messverfahren fr Funksender - Teil 1: bertragungseigenschaf
8、ten von terrestrischen digitalen Fernsehsendern (IEC 62273-1:2007) This European Standard was approved by CENELEC on 2007-03-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national sta
9、ndard 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. This European Standard exists in three official versions (English, French, German). A version in any ot
10、her 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 members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Repu
11、blic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 103/63/FDIS, futu
12、re edition 1 of IEC 62273-1, prepared by IEC TC 103, Transmitting equipment for radio communication, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62273-1 on 2007-03-01. The following dates were fixed: latest date by which the EN has to be implemented at national l
13、evel by publication of an identical national standard or by endorsement (dop) 2007-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-03-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62273
14、-1:2007 was approved by CENELEC as a European Standard without any modification. _ EN 62273-1:2007 2 CONTENTS 1 Scope.5 2 Normative references .5 3 Terms, definitions and abbreviations 6 4 General conditions of measurement .8 4.1 Temperature and humidity.8 4.2 Conditions for primary power supply8 4.
15、3 Output power.8 4.4 Test load .8 4.5 Auxiliary equipment.8 4.6 Test equipment and test signals 9 5 General characteristics.9 5.1 Frequency .9 5.2 Output power.10 5.3 Spurious domain emission.13 5.4 Out-of-band domain emission13 5.5 Occupied bandwidth 14 5.6 Power consumption .15 6 Transmitted signa
16、l characteristics.15 6.1 Intermodulation (shoulders).15 6.2 Modulation error ration (MER) .16 6.3 Bit error ratio (BER) 16 6.4 Equivalent noise degradation 17 6.5 Phase noise 18 7 Protection against atmospheric discharge.19 8 Acoustic noise 19 9 Safety.19 Annex A (normative) Eye-height characteristi
17、cs .20 Annex B (normative) Characteristic frequency 21 Annex C (normative) Frequency drift.24 Annex D (normative) Attenuation of the measuring coupler .25 Annex E (normative) Spurious emissions/out-of-band emissions.27 Annex F (normative) DVB-T shoulder attenuation measurement .31 Annex G (normative
18、) Modulation error ratio (MER) measurement35 Annex H (normative) Bit error rate (BER) measurement37 Bibliography38 EN 62273-1:2007 3 Annex ZA (normative) Normative references to international publications with theircorresponding European publications39Figure 1 Measuring set-up for output power .11 F
19、igure 2 Measuring set-up for spurious emission, out-of-band emission and bandwidth .14 Figure A.1 Transmitter eye diagram for jitter 20 Figure B.1 Measurement22 Figure B.2 Frequency spectrum analysis23 Figure D.1 Measurement25 Figure D.2 Relative coupling 26 Figure D.3 Coupling attenuation.26 Figure
20、 E.1 Attenuation curve28 Figure E.2 Out-of-band and spurious emissions.29 Figure E.3 Output filter.29 Figure E.4 High-frequency spectrum 30 Figure E.5 Superimpose curve .30 Figure F.1 Measurement 31 Figure F.2 Shoulder attenuation.32 Figure F.3 Analyser setting 32 Figure F.4 Measurement system of in
21、termodulation .33 Figure F.5 Measurement of intermodulation at the upper side of the channel .34 Figure G.1 Measurement .35 Figure H.1 Measurement37 Table 1 Measurement parameters for out-of-band emission .14 Table 2 Measurement parameters for occupied bandwidth.15 Table 3 Equivalent noise bandwidth
22、.17 Table A.1 Electrical characteristic specifications for ASI link20 EN 62273-1:2007 4 METHODS OF MEASUREMENT FOR RADIO TRANSMITTERS Part 1: Performance characteristics of terrestrial digital television transmitters 1 Scope This part of IEC 62273 gives the conditions for measuring the performance p
23、arameters of terrestrial digital transmitters and for facilitating 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 transmitters. The measurement methods
24、 described apply to a limited 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. If necessary, additional tes
25、ts can be carried out but they shall comply with those standards which have been established by other study groups, subcommittees of the IEC or other international or suitably accredited organizations. No limits have been assigned to quantify acceptable ranges of performance parameters. These are ju
26、dged to be properly included in the technical specifications for individual transmitters; however, the terms and the manner used to quantify them should ideally be those described in a future IEC publication. The measurement methods described in this standard are intended for type approval tests. Ho
27、wever they can equally well apply to acceptance tests measurements and quality control tests either in factories or on site. Test signals are used to measure performance parameters for both digital and analogue terrestrial transmitters. Their electronic characteristics and their associated performan
28、ce parameters are widely understood. The test signals are measured after they have gone through the transmitter equipment to determine if their degradation is within the required quality criteria. This standard does not go into any detail regarding MPEG 2 signals or DVB processes nor does it deal wi
29、th digital signal processing. 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 any amendments) appli
30、es. IEC 60215, Safety requirements for radio transmitting equipment IEC 60244-1, Methods of measurement for radio transmitters Part 1: General characteristics for broadcast transmitters ITU-R Recommendation BT.1306-3, Error correction, data framing, modulation and emission methods for digital terres
31、trial television broadcasting. ITU-R:2004, Radio Regulations EN 62273-1:2007 5 ETS 30 0744, Digital video broadcasting Framing structure, channel coding and modulation for digital terrestrial television. ETSI 101 290, Digital video broadcasting (DVB) Measurement guidelines for DVB system 3 Terms, de
32、finitions and abbreviations For the purposes of this document, the following terms, definitions and abbreviations apply. 3.1 ASI Asynchronous Serial Interface 3.2 ATSC Advanced Television Systems Committee 3.3 BER Bit Error Ratio 3.4 BW Bandwidth 3.5 C/N Ratio of the r.f. or i.f. carrier power to no
33、ise power 3.6 COFDM Coded Orthogonal Frequency Division Multiplex 3.7 CPE Common Phase Error 3.8 DVB Digital Video Broadcasting 3.9 DVB-T Digital Video Broadcasting baseline system for digital terrestrial television 3.10 END Equivalent Noise Degradation 3.11 ETS European Telecommunication Standard 3
34、.12 ICI Inter Carrier Interference EN 62273-1:2007 6 3.13 IEC International Electrotechnical Commission 3.14 ISDB-T Integrated Services Digital Broadcasting for Terrestrial broadcasting system 3.15 ISO International Organization for Standardization 3.16 ITU International Telecommunication Union 3.17
35、 JEITA Japan Electronics therefore, the acceptable limits for SFN may be specified for each system. 5.1.2 Characteristic frequency A frequency which can easily be identified and measured in the occupied band of an emission The term “characteristic frequency” is used in this standard to denote the ac
36、tual frequency of that component of the emission, the nominal value of which is the assigned frequency. Complementary information is given in Annex B. 5.1.3 Frequency tolerance The frequency tolerance is the permissible departure of the characteristic frequency of an emission from the assigned frequ
37、ency. The frequency tolerance is expressed in parts per 106or in hertz. 5.1.4 Frequency stability The frequency stability is the extent to which an emission maintains its assigned frequency within frequency tolerance. A random departure from the assigned frequency is expressed as frequency error. 5.
38、1.5 Frequency error The frequency error is the difference between the assigned frequency and the characteristic frequency, and shall not exceed the specified frequency tolerance. The maximum frequency error is expressed in hertz and shall be compared with the frequency tolerance in the ITU Radio Reg
39、ulations or with the relevant statement in the equipment specification. EN 62273-1:2007 9 5.1.6 Frequency drift The frequency drift of an emission is the uncontrolled continuous and irreversible variation of frequency against a predetermined time scale. The latter shall be chosen to identify short-t
40、erm and/or long-term frequency variations, expressed in hertz against a defined timescale defined in the technical specification for the equipment. Complementary information is given in Annex C. 5.1.7 Frequency-setting error When a transmitter is set to a particular frequency, the characteristics fr
41、equency obtained will generally differ from the assigned frequency. This is the frequency-setting error. 5.1.8 Condition of operation The transmitter shall be operated under the conditions given in Clause 4. These conditions shall be clearly stated together with the condition of modulation. 5.1.9 Me
42、thods of measurement of the characteristic frequency of an emission The characteristic frequency may be measured with any suitable measuring device, provided that the accuracy attained during the measurement is better than approximately 10 % of the frequency tolerance of the frequency stability give
43、n in the relevant equipment specification of the transmitter. NOTE To achieve the required accuracy, the spectrum analyser and, if necessary, the frequency counter used should be synchronized with a frequency reference independent of the transmitter being tested (GPS 10 MHz or rubidium standard). Ot
44、her methods of great precision use a standard reference frequency, the frequency of which is known with high accuracy. With such a method, the reception of a standard frequency transmission may be used to advantage. When the frequency is to be measured as a function of time, measurements shall be ma
45、de at intervals that are short enough to reveal the presence of superimposed periodic variations and long enough to reveal frequency drift. It is recommended that the measurements are made with a recording instrument. The accuracy of the measuring method, if known, shall be stated with the results o
46、f the measurements. If not known, an estimate should be given, based on measuring data. The conditions of operation shall also be given together with the assigned frequency of the emission which has been used as the characteristics frequency. 5.2 Output power 5.2.1 General note on output power For a
47、 digital signal with the COFDM modulation process the power is distributed evenly throughout the transmission channel. Hence, when taking power measurements on such a signal, the total bandwidth occupied by the modulated signal shall be taken into account. The product of the mean power of the aerial
48、 voltage and current signals is defined as the power output for a particular channel. The output power is the first parameter to be measured when checking performance parameters or carrying out conformity checks. In the case of a digital signal, the mean power value is the most appropriate for the m
49、odulation type being used EN 62273-1:2007 10 5.2.2 Measuring arrangement Figure 1 shows the measuring set-up to be used. 5.2.3 Test signal The transmission parameters of the test signal shall be specified for each system. If no such specification is given, a signal comprising PRBS 223-1-8K 64-QAM 7/8 from the COFDM encoder and modulator shall be used. 5.2.4 Method of measurement 5.2.4.1 Calorimetric method The value for the output power is de
copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
备案/许可证编号：苏ICP备17064731号-1