1、STD.BSI BS EN bL07-2-ENGL 1797 Lb24bb9 b49234 5T7 BRITISH STANDARD Methods of measurement on receivers for television broadcast transmissions Part 2. Audio channels - General methods and methods for monophonic channels The European Standard EN 60107-2 : 1997 has the status of a British Standard ICs
2、33.160.20 BS EN 60107-2 : 1997 EC 60107-2 : 1997 n n U NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGH LAW u STD-BSI BS EN bOL07-2-ENGL 1777 Lb24bb9 Ob49L35 433 BS EN 60107-2 : 1997 National foreword This British Standard is the English language version of EN 60107-2 : 1997. It is
3、identical with IEC 60107-2 : 1997. It supersedes BS 3549 : Part 2 : 1981 which will be withdrawn on 1997-1241. The UK participation in its preparation was entrusted by Technical Committee EPU100, Audio, video and multimedia systems and equipment, to Subcommittee EPU100/1, Receiving equipment, which
4、has the responsibdity to: - aid enquirers to understand the text; - present to the responsible internationalEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related international and European developments and promulgate th
5、em in the UK. A list of organhations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the chang
6、e over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is rawn to the fact that annex ZA lists normative references to international publications with their corresponding European publications. The Brim Standards which implem
7、ent these international or European publications may be found in the BSI standards Catalogue under the section entitled Internalional Standards Correspondence Index, or using the Fnd facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confer immu
8、nity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 28, an inside back cover and a back cover. This British Standard, having been prepared under the direction of the Electrokchnicai Sector Board, was published unde
9、r the authority of the Standards Board and comes into effect on 15 August 1997 Amendments issued since publication Amd.No. IDate I Text affected O BSI 1997 ISBN O 680 27736 6 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60107-2 May 1997 ICC 33.160.20 Descriptors: Television receivers, measur
10、ements, electric measurements, radio frequencies, transmission channels, sound transmission, characferistics. distorsion, sensitivity English version Methods of measurement on receivers for television broadcast transmissions Part 2: Audio channels - General methods and methods for monophonic channel
11、s (IEC 60107-2:1997) Mthodes de mesures applicables aux rcepteurs de tlvision Partie 2: Voies son - Mthodes gnrales et mthodes pour voies monophoniques (CE1 601 07-2: 1997) M everf a h re n f U r Empfnger f U r Fernseh-Rundfunksendungen Teil 2: Tonkanie - Allgemeine Meverfa hren und Meverfa hren fr
12、monophone Kanle (IEC 601 07-2: 1997) This European Standard was approved by CENELEC on 1997-03-1 1. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
13、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 other language made by translati
14、on 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, Denmark, Finland, France, Germar,y, Greece, Iceland, Ireland,
15、Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland 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
16、 - 1050 Brussels 1997 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENtLEC members. Ref. No. EN 60107-2:1997 E STD-BSI BS EN bO107-2-ENGL 1777 Lb24bb9 Ob49137 20b Page 2 EN 60107-2 : 1997 Foreword The text of document 1 00A/22/FDISf future edition 2 of IEC
17、 601 07-2, prepared by SC 1 OOA, Multimedia end-user equipment, of IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 601 07-2 on 1997-03-1 1. The following dates were fixed: - latest date by which the EN ha
18、s to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-12-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (daw) 1997-12-01 Annexes designated “normative“ are part of the body of the standard. A
19、nnexes designated “informative“ are given for information only. In this standard, annex ZA is normative and annex A informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 60107-2:1997 was approved by CENELEC as a European Standard without any m
20、odification. In the official version, for annex A, Bibliography, the following notes have to be added for the standards indicated: IEC 65 NOTE: Harmonized, together with its amendments 1 :1987, 2:1989 and 3:1992, as EN 60065: 1993 (modified). IEC 315-3 NOTE: Harmonized as HD 560.3 S1:1992 (not modif
21、ied). CISPR 13 NOTE EN 55013:1990 (CISPR 131975 + A1:1983, mod.) + A121994 applies. The title of EN 55013 is: Limits and methods of measurement of radio disturbance characteristics of broadcast receivers and associated equipment. CISPR 20 NOTE: Instead of CISPR 20:1996, EN 55020:1994 + com. Jan. 199
22、6 + Al 1:1996, Electromagnetic immunity of broadcast receivers and associated equipment, applies. . . * * rn . . STD.BSI BS EN bOL07-2-ENGL 1997 Lb24bb9 Ob49L38 142 I Page 3 EN 60107-2 : 1997 CONTENTS Clause 1 General . 1.1 Scope . 1.2 Normative references . 1.3 Definitions 1.3.1 Audio channel . Gen
23、eral notes on measurements . 2 2.1 General conditions . 2.2 Audio-frequency input signal 2.2.1 Standard reference frequency 2.2.2 Audiofrequencies for measurements Radio-frequency (f.f.) television signal . 2.3.1 Carrier levels . 2.3.2 Modulation factor 2.3.3 Reference modulation factor Measuring sy
24、stem and test instruments 2.5.1 Audio filters . 2.5.2 Audio-frequency spectrum analyzer . 2.5.3 Audio voltmeter . 2.5.4 Psophometer (weighted noise meter) . 2.6 Standard measuring conditions . 2.6.2 Standard r.f. input signal levels . 2.6.3 Standard output power and voltage General methods of measur
25、ement 3 Audio-frequency output power 2.3 2.4 Radio-frequency input signals 2.5 2.6.1 Standard r.f. television signal . 2.6.4 Standard receiver settings . . 2.7 3.1 Definition 3.2 Audio-frequency substitute load . . 3.3 Measurement of audio-frequency output power 4 Audio-frequency characteristics . 4
26、.1.1 Audio-frequency response characteristics . 4.1 Amplitude response to audiofrequencies . 4.1.2 Characteristics of tone control or equalizer 4.1.3 Characteristics of loudness control . 4.1 -4 Volume control characteristic 4.2 Audio-f requency non-linear distortion . 4.2.1 Introduction . . 4.2.2 T
27、otal harmonic distortion . 4.2.3 Intermodulation . . Page 5 6 6 6 6 7 7 7 7 7 7 8 8 8 8 8 8 9 9 9 10 10 10 11 11 11 11 11 12 12 13 13 13 13 14 Page 4 EN 60107-2 : 1997 Clause Page 5 Internally generated interference 15 5.1 5.2 5.3 5.4 Buz . 5.1.1 Definition . 5.1.2 Method of measurement . 5.1.3 Pres
28、entation of results Hum 5.2.1 Definition . 5.2.2 Method of measurement . 5.2.3 Presentation of results Line-scan frequency interference . 5.3.1 Definition . 5.3.2 Method of measurement . Amplitude modulation suppression ratio 5.4.1 Definition . 5.4.2 Method of measurement . 5.4.3 Presentation of res
29、ults 6 Sensitivity . 6.1 Signal-to-noise ratio . 6.1.1 Definition . 6.1.2 Method of measurement . 6.1.3 Presentation of results 6.2 Ultimate signal-to-noise ratio 6.2.1 Definition . 6.2.2 Method of measurement . 6.3 Noise-limited sensitivity 6.3.1 Definition . 6.3.2 Method of measurement . 6.3.3 Pre
30、sentation of results Immunity to undesired signals 7.1 Introduction 7.2 Basic method of measurement 7.2.1 Measurement Set-up . 7.2.2 Measurement procedure 7.3 Presentation of results . 7 Table 1 Preferred frequencies Fig u res 1 2 3 4 5 Annex A Bibliography . ZA - Normative references to internation
31、al publications with their corresponding European publications . 200 Hz to 15 kHz bandpass filter 22.4 Hz to 15 kHz bandpass filter Measurement of amplitude modulation suppression ratio . Measurement of signal-to-noise ratio . Measurement of wanted-to-unwanted r.f. signal ratio 15 15 15 15 16 16 16
32、16 16 16 16 17 17 17 17 18 18 18 18 18 19 19 19 19 19 19 19 19 19 20 20 20 21 22 23 23 24 24 25 26 27 * * IB STD-BSI ES EN bL07-2-ENGL 1777 .il Lb24bbS Ob49L40 BTO 8 Page 5 EN 60107-2 : 1997 METHODS OF MEASUREMENT ON RECEIVERS FOR TELEVISION BROADCAST TRANSMISSIONS - Part 2: Audio channels - General
33、 methods and methods for monophonic channels 1 General 1.1 Scope This pari of IEC 107 deals with the general methods of measurement of the audio channels of receivers for monophonic systems and multichannel sound systems. General considerations for the measurements are specified in IEC 107-1 and the
34、 measurements specific to the multichannel sound systems are dealt with by IEC 107-3, IEC 107-4 and IEC 107-5. Measurements for non-broadcast signals are dealt with by IEC 107-6. This standard deals with the determination of performance and permits the comparison of equipment by listing the characte
35、ristics which are useful for specifications and by laying down uniform methods of measurement for these characteristics. Performance requirements are not specified. This standard does not deal with general safety matters, for which reference should be made to IEC 65 l or other appropriate IEC safety
36、 standards, nor with radiation and immunity, for which reference should be made to CISPR 13 and CISPR 20 2 (31. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 107. At the time of publicati
37、on, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 107 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and IS0 mainta
38、in registers of currently valid International Standards. IEC 107-1 : 1997, Methods of measurement on receivers for television broadcast transmissions - Part 1: General considerations - Electrical measurements at radio and video frequencies IEC 107-3: 1988, Recommended methods of measurement on recei
39、vers for television broadcast transmissions - Part 3: Electrical measurements on muitichannel sound television receivers using subcarrier systems IEC 1074: 1988, Recommended methods of measurement on receivers for television broadcast transmissions - Patt 4: ElectnCal measurements on multichannel so
40、und television receivers using the twocamer FM-system IEC 107-5: 1992, Recommended methods of measurement on receivers for television broadcast transmissions - Part 5: Electrical measurements on mutichannel sound television receivers using the NICAM twochannel digital sound-system IEC 107-6: 1989, R
41、ecommended methods of measurement on receivers for television broadcast transmissions - Part 6: Measurement under conditions different from broadcast signal standads Figures in square brackets refer to the bibliography given in annex A. Page 6 EN 60107-2 : 1997 IEC 268-1 : 1985, Sound system equipme
42、nt - Part 1: General IEC 268-2: 1987, Sound system equipment - Part 2: fxp/anation of general tem and calculation methods IEC 268-3: 1988, Sound system equipment - Part 3: Amplfiers IEC 268-5: 1989, Sound system equipment - Part 5: Loudspeakers IEC 315-1: 1988, Methods of measurement on radio receiv
43、ers for various classes of emission - Part I: General considerations and methods of measurement, including audio-frequency measurements Recommendation ITU-R BS 468-4: 1994, Measurement of audio-frequency noise voitage level in sound broadcasting 1.3 Definitions For the purpose of this part of IEC 10
44、7 the definitions in IEC 107-1, clause 2, as well as the following definition apply. 1.3.1 Audio channel Channel to convey audio information. A stereo channel consists of two audio channels for the left and right signals. 2 General notes on measurements 2.1 General conditions See 3.1 of IEC 107-1. 2
45、.2 Audio-frequency input signal 2.2.1 Standard reference frequency The standard reference frequency for audio-frequency measurements and for adjustment purposes is 1 kHz. NOTE - In the BTSC multichannel sound system, the standard reference frequency for modulation is 300 Hz. 2.2.2 Audio frequencies
46、for measurements To facilitate the comparison of results, the selection of audiofrequencies for receiver measurements shall preferably be restricted to a minimum. If a continuous record is not required, measurements should be made at the frequencies selected from the preferred frequencies shown in t
47、able 1 (see IEC 268-1). Use of frequencies other than those indicated may be necessary for certain purposes, for example at frequencies at which anomalies are observed. STD.BS1 BS EN bOL07-2-ENGL 1797 8 Lb24bb Ob49142 b73 E Page 7 EN 60107-2 : 1997 2.3 Radio-frequency (r. f.) television signal 2.3.1
48、 Carrier levels See 3.3.1 of IEC 107-1. It should be noted that the level of a radio-frequency television signal is expressed by the level of the modulated vision carrier even when the measurements are made on the audio channels. The level of the sound carrier is set to the nominal vision-to-sound p
49、ower ratio defined by the television standard for which the receiver under test is designed. When a multichannel sound system is used, the sound carrier(s) shall comply with its standard. 2.3.2 Modulation factor In the case of sinusoidal modulation, the audio-frequency input level shall be expressed in terms of the modulation factor of the radio-frequency input signal: - for systems using an amplitude-modulated sound carrier or subcarrier, the modulation percentage; - for systems using a frequency-modulated sound carrier or subcarrier, the
