1、BRITISH STANDARD Methods of measurement for radio transmitters Part 5. Performance characteristics of television transmitters The European Standard EN 60244-5 : 1994 has the status of a British Standard UDC 621.596.61.083 62 997.13.001.11.001.2 621.31 7.61 ti. 091.092.24 ci21.391.837.21 BS EN 60244-
2、5 : 1995 IEC 244-5 : 1992 I 3404589 0095775 OTO W Amd. No. BS EN 60244-5 : 1995 Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee EPLI 12, Radiocommunication, upon which the following bodies were represen
3、ted: British Broadcasting Corporation British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc Institution of Electrical Engineers Radio, Electrical and Television Retailers Association Radiocommunications Agency This British Standard, having been prepared unde
4、r the direction of the Electrotechnical Sector Board (Lll), was published under the authority of the Standards Board and comes into effect on 15 June 1995 0 ES1 1995 The following BSI references relate to the work on this standard: Committee reference EPL/12 Special announcement in BSI News July 199
5、4 ISBN O 580 24302 8 E 3404589 0095776 T37 BS EN 60244-5 : 1995 National foreword This British Standard has been prepared by Technical Committee EPL/12 and is the English language version of EN 60244-5 : 1994 Methods of measurement for radio transmitters Pdrt 5: Performance characteristics of televi
6、sion transmitters, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 244-5 : 1992, published by the International Electrotechnical Commission (IEC) and is part of a series describing the recommended methods of measurement for assessing the p
7、erformance of radio transmitters. This Part of BS EN 60244 describes the methods of measurement for assessing the performance characteristics of television transmitters and is intended to be used for type tests and acceptance or factory tests. For ease of reproduction, on some of the figures the Fre
8、nch text has been retained. Other Parts of BS EN 60244 published to date are as follows: Part 10 : 1993 Part 11 : 1993 Part 12-1 : 1994 Methods of measurement for television transmitters and transposers employing insertion test signals Transposers for FM sound broadcasting hideline for drawing up de
9、scriptive leafits for transmitters and transposers for sound and tehision broadcasting Section 12.1 Characteristics to be specvied hideline for drawing up descriptive leafits for transmitters and transposers for sound and television broadcasting Section 12.2 Specification sheets Peqformance characte
10、ristics for FM sound broadcasting Part 12-2 : 1994 Part 13 : 1993 It is anticipated that other Parts of IEC Publication 244 will be published as identical British Standards, subject to their harmonization by CENELEC. Cross-references Publication referred to Corresponding British Standard BS EN 60244
11、 Methods of measurement for radio transmitters Part 10 : 1993 Methods of measurement for tehision transmitters and transposers employing insertion test signals Part 12 hideline for drawing up descriptive leafits for transmitters and transposers for sound and television broadcasting. Section 12.1 : 1
12、994 Characteristics to be specified EN 60244-12-2 : 1993 Part 12 hideline for drawing up descriptive Zeafits (IEC 60244-12-2 : 1989) for transmitters and transposers for sound and tehision broadcasting Section 12.2 : 1994 Specvication sheets Part 13 kfmance characteristics for FM sound EN 60244-10 :
13、 1993 (IEC 244-10 : 1986) EN 60244-12-1 : 1993 (IEC 244-12-1 : 1989) EN 60244- 13 : 1993 (IEC 60244-13 : 1991) broadcasting Compliance with a British Standard does not of itself confer immunity from legal obligations. i - = 3Li04589 0095777 973 m EUROPEAN STANDARD EN 60244-5 NORME EUROPENNE EUROPISC
14、HE NORM May 1994 UDC 621.396.61.083 621.397.13.001, 11.001.2 62 1.31 7.616.091 .O9224 62 1.39 1.837.2 1 Supersedes HD 236.5 S4 : 1979 Descriptors: Radio equipment, transmitter, television, operating characteristics, quality English version Methods of measurement for radio transmitters Part 5: Perfor
15、mance characteristics of television transmitters (IEC 244-5 : 1992) Mthodes de mesure applicables aux emtteurs radiolectriques Partie 5: Qualits de fonctionnement des metteurs de tlvision (CE1 244-5 1992) Meverfahren fr Funksender %il 5: Ubertragungseigenschaften von Fernsehsendern (IEC 244-5 : 1992
16、) This European Standard was approved by CENELEC on 1993-12-08. 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 standard without any alteration. Up-to-date lists and bibliographica
17、l 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 other language made by translation under the responsibility of a CE
18、NELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CEhtLEC members are the national electrotechnical committees of Austria, Bela *j m, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy. Luxembourg, Netherlands, No
19、rway, Portugal, Spain, Sweden, Swj zerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels O 1994 Copyright re
20、served to CENELEC members Ref. No. EN 60244-5 : 1994 E Previous page is blank 3404589 0095778 BOT Page 2 EN 60244-5 : 1994 Foreword The CENELEC questionnaire procedure, performed for finding out whether or not the International Standard IEC 244-5 : 1992 could be accepted without textual changes, has
21、 shown that no common modifications were necessary for acceptance as a European Standard. The reference document was submitted to the CENELEC members for formal vote and was approved by CENELEC as EN 60244-5 on 8 December 1993. This European Standard replaces HD 236.5 S4 : 1979. The following dates
22、were fixed: - latest date of publication of an identical national standard (dop) 1994-12-01 - latest date of withdrawal of conflicting national standards (dow) 1994-12-01 Annexes designated normative are part of the body of the standard. In this standard annexes A, B and ZA are normative. Corrigendu
23、m Editorial correction to the English version of Under 2.2, CCIR Publications, replace CCIR Recommendation 567-1 : 1986 by CCIR Recommendation 567-3 : 1990 (the title is unchaged). IEC 244-5: BBI 3404589 0095779 746 M Page 3 EN 60244-5 : 1994 CONTENTS FOREWORD INTRODUCTION . Clause 1 2 3 4 5 6 7 8 9
24、 Scope Normative references 2.1 IEC publications 2.2 CCIR publications . General terms and definitions 3.1 Television transmitter 3.2 Description of the television systems and other relevant information 3.3 Definitions of performance characteristics . 3.4 Standard test signals General conditions of
25、operation General conditions of measurement . 5.1 Input and output signal arrangements 5.2 Measuring equipment 5.3 Modulation and power conditions 5.4 General characteristics . Output power. power consumption and power factor 6.1 Definitions . 6.2 Measuring arrangement 6.3 Test signal 6.4 Measuring
26、procedure . 6.5 Calculation and presentation of the results The characteristic vision levels . 7.1 Introduction . 7.2 Setting the characteristic levels to nominal values . 7.3 Performance of the white clipper . 7.4 Stability of the reference levels and output power Linear distortion . 8.1 Introducti
27、on . 8.2 . Amplitudeiradio-f requency characteristic . 8.3 Amplitude/video-f requency characteristic . 8.4 Group-delayhadio-frequency characteristic . 8.5 Group-delay/video-frequency characteristic . Non-linear distortion 9.1 Introduction . 9.2 Luminance non-linearity 9.3 Differential gain and phase
28、 . 2 5 6 6 6 7 7 7 7 7 7 7 8 8 8 8 8 9 9 9 9 9 10 10 10 11 11 12 16 16 16 17 18 19 20 20 20 21 = 3404589 0095780 468 Page 4 EN 60244-5 : 1994 9.4 Chrominance non-linearity . 23 9.6 Incidental phase modulation . 24 9.5 Chrominance-luminance intermodulation or cross-talk . 23 10 Waveform distortion .
29、25 10.1 10.2 10.3 10.4 10.5 10.6 10.7 10.8 10.9 10.10 10.1 1 Introduction . 2T-pulse distortion including the pulse-bar ratio . T-step or i-pulse distortion Field-time bar tilt Line-time bar tilt . Luminance bar tilt Line synchronizing pulse distortion . Field blanking interval distortion Line tilt
30、. Long-time signal distortion Chrominance-luminance gain and delay inequality using a composite pulse 25 26 28 29 30 30 31 32 32 33 34 11 Unwanted modulation 35 11.1 Introduction . 35 11.2 Random noise 35 11.3 Low frequency periodic noise . 37 11.4 High frequency periodic noise including intermodula
31、tion . 37 11.5 Impulsive noise 39 39 12.1 Introduction . 39 12.2 12 Special measurements for data signals in the vision signal . Eye height and eye width 40 12.3 Position of the penultimate clock run-in-bit 41 Method of measurement of the sound channel(s) of a television transmitter 13.2 Measuring a
32、rrangement 42 13 41 13.1 Introduction . 41 13.3 43 13.4 Method of measurement of the AM sound channel . 43 13.5 Special measurement for two or more sound channels 44 Figures . 46 Method of measurement of the FM sound channel (single sound) . Annexes (nomative) Al A.2 A3 A4 Filters for use in measure
33、ments 83 A5 B Test signals 89 ZA Other international publications quoted in this standard with the 96 References to the IEV and Recommendations and Reports of the CCIR . 61 Channels and frequencies allocated to television broadcasting copy . . 62 Characteristics of television systems 65 A bw-pass Ga
34、ussian filter for eye height measurement (calibrated filer) 88 references of the relevant European publications 0 3404589 0095783 3T4 Page 5 EN 60244-5 : 1994 INTRODUCTION This International Standard is one of a series of parts of IEC 244. Some of the existing parts of IEC 244 are currently under re
35、view and several of these will be revised or withdrawn. When this process is completed, this series of publications will comprise one part dealing with general characteristics, with cross-references to relevant CCIR publications and Radio Regulations (CCIR), and a number of specialized parts, each d
36、ealing with particular types of transmitters. Page 6 EN 602445 : 1994 METHODS OF MEASUREMENT FOR RADIO TRANSMITTERS Part 5: Performance characteristics of television transmitters 1 Scope This International Standard describes the methods of measurement for assessing the performance characteristics of
37、 television transmitters. To assess all other characteristics, this standard needs to be used in conjunction with the publications quoted in clause 2. This standard is intended to be used for type tests and acceptance or factory tests. It is not mandatory to measure all the described characteristics
38、. Additional measurements may be carried out by agreement between customer and manufacturer. The performance characteristics measured in accordance with this standard make possible the comparison of the results of measurements made by different observers. Limiting values for acceptable performance a
39、re not covered by this standard but, in connection with the presentation of measured characteristics, some data are given for clarity. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 244. At
40、the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 244 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members
41、of IEC and IS0 maintain registers of currently valid international Standards. 2.1 IEC publications IEC 244-1: 1968, Methods of measurement for radio transmitters - Part 7: General con- ditions of measurement, frequency, output power and power consumption (revision under consideration). Amendment 2,
42、1989. (Amendment 2 replaces IEC 244-1A.) IEC 244-10: 1986, Methods of measurement for radb transmitters - Part 70: Methods of measurement for television transmitters and transposers employing insertion rest signals. IEC 244-12-1 : 1989, Methods of measurement for radio transmitters - Part 72: Guidel
43、ine for drawing up descriptive leaflets for transmitters and transposers for sound and tele- vision broadcasting - Characteristics to be specified. II 3404589 0095783 177 Page 7 EN 60244-5 : 1994 IEC 244-1 2-2: 1989, Methods of measurement for radio transmitters - Part 12: Guideline for drawing up d
44、escriptive leaflets for transmitters and transposers for sound and tele- vision broadcasting - Specification sheets. IEC 244-13: 1991. Methods of measurement for radio transmitters - Part 13: Performance characteristics for FM sound broadcasting. 2.2 CCIR publications CCIR Recommendation 468-4: 1986
45、, Measurement of audio frequency noise voltage level in sound broadcasting. CCIR Recommendation 567-1 : 1986, Transmission performance of television circuits designed for use in international connections. CCIR Recommendation 653: 1986, Teletext systems. CCIR Report 624-3: 1986, Characteristics of te
46、levision systems. CCIR Report 795-2: 1986, Transmission of two or more sound programmes or information channels in television. 3 General terms and definitions 3.1 Television transmitter The term “television transmitter“ is used in this part to refer to that equipment with a video input and one or mo
47、re audio inputs and a combined vision and sound radio frequency output. 3.2 Description of the television systems and other relevant information See annex A, clause A.3. 3.3 Definitions of performance characteristics These definitions are given in the clauses describing the method of measurement and
48、 are in line with those given in IEC 244-12-1 and IEC 244-12-2. 3.4 Standard test signals The test signals to be used for measuring the vision signal are given in annex B. 4 General conditions of operatlon - The television transmitter shall be tested in the normal operating conditions and at its rat
49、ed output power. - The power supply voltage and the environmental conditions shall be stated with the measurement results. - The television transmitter shall be connected to a test load having a VSWR S1,05 within the channel bandwidth. H 3404589 O095784 003 = Page 8 EN 60244-5 : 1994 5 General conditions of measurement 5.1 Input and output signal arrangements - For each method of measurement, the input and output signal arrangement is given in the form of a diagram (see annex A). - The impedance of the test equipment, the test object and all connections between th
