BS EN 60244-10-1993 Methods of measurement for radio transmitters - Methods of measurement for television transmitters and transposers employing insertion test signals《无线电发射机测量方法 采.pdf

1、BRITISH STANDARD BS EN 60244-10:1993 IEC 244-10: 1986 Methods of measurement for radio transmitters Part 10: Methods of measurement for television transmitters and transposers employing insertion test signals The European Standard EN 60244-10:1993 has the status of a British Standard UDC 621.397.6:6

2、21.317BSEN60244-10:1993 This British Standard, having been prepared under the directionof the Electronic Equipment Standards Policy Committee, was published underthe authority of the Standards Board and comesintoeffect on 15December1993 BSI 12-1999 The following BSI references relate to the work on

3、this standard: Committee reference EEL/25 Special announcement in BSINews September 1993 ISBN 0 580 22730 8 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees

4、of the following countries: Austria Italy Belgium Luxembourg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date CommentsBSEN60244-10:1993 BSI 12-1999 i Contents Page Cooperating o

5、rganizations Inside front cover National foreword ii Foreword 2 Text of EN 60244-10 5 National annex NA (informative) Committees responsible Inside back coverBSEN60244-10:1993 ii BSI 12-1999 National foreword This Part of BS EN 60244 has been prepared under the direction of the Electronic Equipment

6、Standards Policy Committee and is the English language version of EN 602044-10:1993, Methods of measurement for radio transmitters. Part10: Methods of measurement for television transmitters and transposers employing insertion test signals, published by the European Committee for Electrotechnical St

7、andardization (CENELEC). It is identical to IEC 244-10:1986, published by the International Electrotechnical Commission (IEC) and is part of a multi-part series describing recommended methods of measurement for assessing the performance of radio transmitters. This Part of BS EN 60244 covers the appl

8、ication of insertion test signal measurement to television transmitters and transposers operating in accordance with television systems for monochrome and colour transmission employing 625 or 525 lines. It may also be used as an alternative means for performing some of the line time measurements des

9、cribed in EN 60244-5 1)or EN 60244-9 1) . It is anticipated that the other Parts of IEC Publication 244 will be published as identical British Standards, subject to their harmonization by CENELEC. For ease of publication, some of the figures also include the French text A British Standard does not p

10、urport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside fron

11、t cover, pages i and ii, theEN title page, pages2 to 42, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. 1) In preparation. It is envisaged th

12、at identical British Standards, designated BS EN 60244-5 and BS EN 60244-9, will be published in due course.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60244-10 April 1993 UDC 621.397.6:621.317 Supersedes HD 236.10 S1:1988 Descriptors: Radio transmitters, television, insertion signals, meas

13、urements, requirements English version Methods of measurement for radio transmitters Part10:Methods of measurement for television transmitters and transposers employing insertiontestsignals (IEC 244-10:1986) Mthodes de mesure applicables aux metteursradiolectriques Diximepartie:Mthodes de mesure app

14、licables aux metteurs et rmetteurs de tlvision, et utilisant les signaux dinsertion (CEI 244-10:1986) Meverfahren fr Funksender Teil10:Meverfahren fr Fernsehsender und-umsetzer mit Prfzeilensignalen (IEC 244-10:1986) This European Standard was approved by CENELEC on 1993-03-09. CENELEC members are b

15、ound 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 bibliographical references concerning such national standards may be obtained on application to the

16、 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 CENELEC member into its own language and notified to the Central Secretariat has the sa

17、me status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committ

18、ee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref. No. EN 60244-10:1993 EEN60244-10:1993 2 BSI 12-1999 Forewo

19、rd At the request of 72nd Technical Board, HD236.10S1:1988 (IEC 244-10:1986) was submitted to the CENELEC voting procedure for conversion into a European Standard. The text of the International Standard was approved by CENELEC as EN 60244-10 on9March1993. The following dates were fixed: Annexes desi

20、gnated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. latest date of publication ofan identical national standard (dop) 1994-06-01 latest date of withdrawal ofconflicting national standards (dow) EN60244-10:1993 BSI 12-1999 3 Contents Page Foreword 2 Intro

21、duction 5 1 Scope 5 2 Object 5 Section 1. Test signals and line selection 3 Introduction 5 4 Insertion test signals 6 5 Line selection 6 6 Content of the active picture period 6 Section 2. General conditions of measurement andinitial adjustment of the equipment 7 Manual and automatic methods of meas

22、urement 6 8 Measuring arrangement 7 9 Conditions of operation 7 10 Adjustment of the VSB demodulator 7 Section 3. Measurement of performance characteristics 11 Conformity with other standards 8 12 Luminance bar amplitude error 8 13 Synchronizing pulse amplitude error 9 14 Luminance bar tilt 9 15 Bas

23、e-line distortion 10 16 2T pulse/bar ratio error 10 17 2T pulse shape distortion 10 18 Amplitude/video-frequency characteristic 11 19 Chrominance-luminance gain inequality 11 20 Chrominance-luminance delay inequality 12 21 Luminance non-linearity 12 22 Chrominance non-linearity 13 23 Differential ga

24、in 13 24 Differential phase 14 25 Chrominance-luminance cross-talk 14 26 Random noise at blanking level 15 27 In-band intermodulation 15 Appendix A CCIR Recommendation 473-3 23 Annex I 625-Line systems 24 Annex II 525-Line systems 30 Appendix B Excerpt of CCIR Recommendation 567-1 36 Appendix C List

25、 of references to Reports andRecommendations of the CCIR 39 Page Annex ZA (normative) Other international publications quoted in this standard with thereferences of the relevant European publications 41 Bibliography 16 Figure 1 Test signal I for 625-line systems 17 Figure 2 Test signal II for 625-li

26、ne systems 17 Figure 3 Test signal III for 625-line systems 18 Figure 4 Test signal IV for 625-line systems 18 Figure 5 Test signal V for 525-line systems 19 Figure 6 Test signal VI for 525-line systems 19 Figure 7 Test signal VII for 625-line systems 20 Figure 8 Test signal VIII for 625-line system

27、s 20 Figure 9 Example of test arrangement 21 Figure 10 Example of oscilloscope graticuleforthe measurement of 2T pulse shapedistortion 22 Figure 11 Chrominance-luminance delayinequality 22 Figure A.1 Line 17 25 Figure A.2 Line 18 27 Figure A.3 Line 330 28 Figure A.4 Line 331 29 Figure A.5 Line 17 of

28、 Field 1 33 Figure A.6 Line 17 of Field 2 34 Figure A.7 Line 17 of Field 1 34 Figure A.8 Line 17 of Field 2 35 Figure B.1 Low-pass filter diagram 36 Figure B.2 Low-pass filter characteristic 37 Figure B.3 Network diagram 37 Figure B.4 Unified weighting characteristics 38 Figure B.5 Thomson filter di

29、agram 39 Table I Characteristics of the video signalsatthetransmitter input and demodulatoroutput for different television standards 5 Table I 26 Table II 30 Table III 32 Table IV 334 blankEN60244-10:1993 BSI 12-1999 5 Introduction This standard is one of a series of parts of IEC Publication 244: Me

30、thods of Measurement for Radio Transmitters, describing recommended methods of measurement for assessing the performance of radio transmitters. In this standard reference is made to other parts ofIEC Publication 244, especially Publication 244-5:Part 5: Measurements Particular to Transmitters and Tr

31、ansposers for Monochromeand Colour Television, and Publication 244-9:Part9: Transposers for Monochrome and Colour Television. 1 Scope This standard applies to television transmitters and transposers operating in accordance with television systems for monochrome and colour transmission employing 625

32、or 525 lines as described in CCIR publications. For details of the characteristics of the various systems, see the CCIR Report 1 mentioned in Appendix C. 2 Object This standard deals with the application of insertion test signal measurement to television transmitters and transposers. This method of

33、measurement is useful for checking the line time performance of the transmitters or transposers during programme service and provides a convenient method of testing transmission performance stability during acceptance tests. It may also be used as an alternative means of carrying out some of the lin

34、e time measurements as described in IEC Publication 244-5 or 244-9 (including supplements). Section 1. Test signals and line selection 3 Introduction Test signals inserted on selected lines in the field-blanking interval of the composite video signal are termed “insertion test signals” and may be in

35、serted by an appropriate instrument, for example an insertion test signal generator. Table I Characteristics of the video signals at the transmitter input and demodulatoroutputfor different television standards 625-line systems 525-line systems U n= 700 mV U s= 300 mV a U n= 714 mV U s= 286 mV a B,

36、G, H, K 1 D, K I L M, N 1(%) 10 12.5 or 15 20 100 10 2(%) b 75 75 76 30 75 U 0(mV) 808 840 or 875 950 300 824 U n0(mV) c 700 700 700 700 714 U s0(mV) 269 280 or 292 300 300 275 a Characteristics of the video signal at the input of the (test) transmitter U n= nominal value of the luminance bar amplit

37、ude, U s= nominal value of the synchronizing pulse amplitude. b Characteristics of the vision signal at the output of the transmitter (or transposer) 1= nominal peak white level in percentage of peak carrier*, 2= nominal blanking level in percentage of peak carrier*. *In accordance with the CCIR Rep

38、ort 1 mentioned in Appendix C; for System L, without taking into account the chrominance sub-carrier. c Characteristics of the video signal at the output of the demodulator U n0= nominal value of the luminance bar amplitude, i.e. the voltage between blanking level and nominal white reference level,

39、U 0= the value to which the voltage between zero-carrier and blanking level is to be adjusted, so that U n0= U n , U s0= nominal value of the synchronizing pulse amplitude, i.e. the voltage between blanking level and nominal synchronizinglevel.EN60244-10:1993 6 BSI 12-1999 4 Insertion test signals A

40、 representative range of insertion test signals is shown in Figure 1 to Figure 8. For ease of reference they are indicated by roman numerals. The test signals I to IV for 625-line systems are given in Figure 1 to Figure 4, pages 17 and 18. Figure 5 and Figure 6, page 19, show the test signals V and

41、VI for 525-line systems. The test signals I to VI are based on the CCIR Recommendation reproduced in Appendix A, to which reference should be made for further details. The test signals VII and VIII are included for the measurement of certain characteristics not included in the CCIR Recommendation. T

42、est signal VII, shown in Figure 7, page 20, is used for measuring the in-band intermodulation products caused by intermodulation between the vision and sound carriers and the sideband component corresponding to the chrominance subcarrier in 625-line equipment, particularly for transmitters and trans

43、posers employing common amplification of the vision and sound channels. A similar test signal may be used for testing 525-line equipment. Test signal VIII, shown in Figure 8, page 20, comprising a signal at blanking level for the full line interval, is used for measuring noise in 625-line equipment.

44、 A similar test signal may be used for testing 525-line equipment. 5 Line selection For out-of-programme service tests, the test signals may be, in principle, inserted in any line in the field-blanking interval. For tests during programme service, the lines selected for the test signals should be in

45、 accordance with relevant CCIR Recommendations and Reports (see Appendix C, reference 4). 6 Content of the active picture period It is assumed that all insertion test signals are simultaneously present on the selected lines of the field-blanking interval. Because the measurement result may depend on

46、 the picture content of the other lines, the average signal level during in-programme measurements shall be stated in the presentation of results. Out-of-programme measurements may be made for different values of average picture level with the luminance level of the active picture lines successively

47、 adjusted to correspond to an “all-black picture” and an “all-white picture”, and, if required, also to a “mid-grey picture”. This shall also be stated in the presentation of results. Section 2. General conditions of measurement and initial adjustment of the equipment 7 Manual and automatic methods

48、of measurement Measurements with insertion test signals can be made either “manually” by means of discrete items of test equipment, such as an oscilloscope, noise meter, etc., or “automatically” by using an insertion test signal analyzer. The analyzer continually scans sequentially the selected perf

49、ormance characteristics and may provide a digital read-out and give an indication when the measured values exceed a predetermined threshold (for example, see the CCIR Reports 5 and 6 mentioned in Appendix C). The advantages of the automatic method include: reduction of measuring time, greater measurement accuracy for most characteristics, the possibility of recording on paper or tape. Except where a distinction is made in particular clauses between manual and automatic metho