1、 IEC 62273-1 Edition 1.0 2007-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Methods of measurement for radio transmitters Part 1: Performance characteristics of terrestrial digital television transmitters Mthodes de mesure applicables aux metteurs radiolectriques Partie 1: Caractristique de perform
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16、ciec.ch. IEC 62273-1 Edition 1.0 2007-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Methods of measurement for radio transmitters Part 1: Performance characteristics of terrestrial digital television transmitters Mthodes de mesure applicables aux metteurs radiolectriques Partie 1: Caractristique de
17、 performance des metteurs de tlvision numrique terrestre INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE W ICS 33.060.20 PRICE CODE CODE PRIX ISBN 978-2-88912-009-3 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commissio
18、n 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. 2 62273-1 IEC:2007 CONTENTS FOREWORD . 4 1 Scope . 6 2 Normative references . 6 3 T
19、erms, definitions and abbreviations 7 4 General conditions of measurement . 9 4.1 Temperature and humidity . 9 4.2 Conditions for primary power supply 9 4.3 Output power . 9 4.4 Test load . 9 4.5 Auxiliary equipment . 10 4.6 Test equipment and test signals 10 5 General characteristics . 10 5.1 Frequ
20、ency . 10 5.2 Output power . 12 5.3 Spurious domain emission . 14 5.4 Out-of-band domain emission 14 5.5 Occupied bandwidth 15 5.6 Power consumption . 16 6 Transmitted signal characteristics . 16 6.1 Intermodulation (shoulders) . 16 6.2 Modulation error ration (MER) . 16 6.3 Bit error ratio (BER) 17
21、 6.4 Equivalent noise degradation 18 6.5 Phase noise 18 7 Protection against atmospheric discharge. 19 8 Acoustic noise 20 9 Safety . 20 Annex A (normative) Eye-height characteristics . 21 Annex B (normative) Characteristic frequency . 22 Annex C (normative) Frequency drift 25 Annex D (normative) At
22、tenuation of the measuring coupler 26 Annex E (normative) Spurious emissions/out-of-band emissions 28 Annex F (normative) DVB-T shoulder attenuation measurement 32 Annex G (normative) Modulation error ratio (MER) measurement 36 Annex H (normative) Bit error rate (BER) measurement . 38 Bibliography 3
23、9 Figure 1 Measuring set-up for output power . 12 Figure 2 Measuring set-up for spurious emission, out-of-band emission and bandwidth . 15 Figure A.1 Transmitter eye diagram for jitter 21 Figure B.1 Measurement 22 Figure B.2 Frequency spectrum analysis 24 Figure D.1 Measurement 26 62273-1 IEC:2007 3
24、 Figure D.2 Relative coupling 27 Figure D.3 Coupling attenuation . 27 Figure E.1 Attenuation curve 29 Figure E.2 Out-of-band and spurious emissions . 30 Figure E.3 Output filter. 30 Figure E.4 High-frequency spectrum 31 Figure E.5 Superimpose curve . 31 Figure F.1 Measurement 32 Figure F.2 Shoulder
25、attenuation . 33 Figure F.3 Analyser setting 33 Figure F.4 Measurement system of intermodulation . 34 Figure F.5 Measurement of intermodulation at the upper side of the channel . 35 Figure G.1 Measurement . 36 Figure H.1 Measurement 38 Table 1 Measurement parameters for out-of-band emission . 15 Tab
26、le 2 Measurement parameters for occupied bandwidth . 16 Table 3 Equivalent noise bandwidth . 18 Table A.1 Electrical characteristic specifications for ASI link 21 4 62273-1 IEC:2007 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ METHODS OF MEASUREMENT FOR RADIO TRANSMITTERS Part 1: Performance characte
27、ristics of terrestrial digital television transmitters 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 international co-opera
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37、may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62273-1 has been prepared by IEC technical committee 103: Transmitting equipment for radio communication. This bilingual version (2012-04) corresponds to t
38、he monolingual English version, published in 2007-02. The text of this standard is based on the following documents: FDIS Report on voting 103/63/FDIS 103/65/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. The Fr
39、ench version of this standard has not been voted upon. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 62273-1 IEC:2007 5 The list of all the publications of the IEC 62273 series, under the general title Methods of measurement for radio transmitters, can be found
40、 on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed,
41、 withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour 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
42、printer. 6 62273-1 IEC:2007 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 parameters of terrestrial digital transmitters and for facili
43、tating 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 described apply to a limited number of performance paramete
44、rs, 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 tests can be carried out but they shall comply with those stand
45、ards 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 judged to be properly included in the technical specifications
46、 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. However they can equally well apply to acceptance tests measur
47、ements 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 performance parameters are widely understood. The test signals are me
48、asured 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 with digital signal processing. 2 Normative references The fol
49、lowing 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) applies. IEC 60215, Safety requirements for radio transmitting equipment IEC 60244-1, Methods of measurement for radio transmitters Part 1: General characteri
