1、BRITISH STANDARD BS EN 60107-2:1997 IEC 60107-2: 1997 Methods of measurement on receivers for television broadcast transmissions Part 2: Audio channels General methods and methods for monophonic channels The European Standard EN60107-2:1997 has the status of a British Standard ICS 33.160.20BSEN60107
2、-2:1997 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15August1997 BSI 09-1999 ISBN 0 580 27735 6 National foreword This British Standard is the English language ver
3、sion of EN60107-2:1997. Itis identical with IEC60107-2:1997. It supersedes BS3549-2:1981 which will be withdrawn on1997-12-01. The UK participation in its preparation was entrusted by Technical Committee EPL/100, Audio, video and multimedia systems and equipment, to Subcommittee EPL/100/1, Receiving
4、 equipment, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UKinterests informed; monitor related international and European developments and
5、promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number60000 added to the old number. For instance, IEC27-1 has been renumbered as IEC60027-1. For a period of time durin
6、g the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact thatAnnex ZA lists normative references to international publications with their corresponding European publications. The British Standard
7、s which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include
8、 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 front cover, pages i
9、and ii, theEN title page, pages 2 to 20 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. Amendments issued since publication Amd. No. Date CommentsBSEN60107-2:1997
10、BSI 09-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 60107-2 5ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60107-2 May 1997 ICS 33.160.20 Descriptors: Television receivers, measurements, electric measurements, radio frequencies, transmission channels
11、, sound transmission, characteristics, distorsion, sensitivity Englishversion Methods of measurement on receivers fortelevisionbroadcast transmissions Part2:Audiochannels General methods and methodsformonophonicchannels (IEC60107-2:1997) Mthodes de mesures applicables auxrcepteurs de tlvision Partie
12、2:Voiesson Mthodes gnralesetmthodes pour voies monophoniques (CEI60107-2:1997) Meverfahren fr Empfnger fr Fernseh-Rundfunksendungen Teil 2: Tonkanle Allgemeine Meverfahren und Meverfahren frmonophone Kanle (IEC60107-2:1997) This European Standard was approved by CENELEC on 1997-03-11. CENELEC member
13、s 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 bibliographical references concerning such national standards may be obtained on application
14、 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 CENELEC member into its own language and notified to the Central Secretariat has
15、 the same 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
16、Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC
17、 members. Ref. No. EN 60107-2:1997 EEN60107-2:1997 BSI 09-1999 2 Foreword The text of document 100A/22/FDIS, future edition2 of IEC60107-2, prepared by SC100A, Multimedia end-user equipment, of IEC TC100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vo
18、te and was approved by CENELEC as EN60107-2 on1997-03-11. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard, Annex ZA is normative and Annex A informative. Annex ZA ha
19、s been added by CENELEC. Endorsement notice The text of the International Standard IEC60107-2:1997 was approved by CENELEC as a European Standard without any modification. In the official version, for Annex A, Bibliography, the following notes have to be added for the standards indicated: latest dat
20、e by which the EN has 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 (dow)1997-12-01 IEC 65 NOTEHarmonized, together with its amendments 1:
21、1987, 2:1989 and 3:1992, as EN60065:1993 (modified). IEC 315-3 NOTEHarmonized as HD 560.3 S1:1992 (notmodified). CISPR 13 NOTEEN 55013:1990 (CISPR 13:1975 + A1:1983, mod.) + A12:1994 applies. The title of EN 55013 is: Limits and methods of measurement of radio disturbance characteristics of broadcas
22、t receivers and associated equipment. CISPR 20 NOTEInstead of ClSPR 20:1996, EN55020:1994 + corr. Jan. 1996 + A11:1996, Electromagnetic immunity of broadcast receivers and associated equipment, applies.EN60107-2:1997 BSI 09-1999 3 Contents Page Foreword 2 1 General 5 1.1 Scope 5 1.2 Normative refere
23、nces 5 1.3 Definitions 5 1.3.1 Audio channel 5 2 General notes on measurements 5 2.1 General conditions 5 2.2 Audio-frequency input signal 5 2.2.1 Standard reference frequency 5 2.2.2 Audiofrequencies for measurements 6 2.3 Radio-frequency (r.f.) television signal 6 2.3.1 Carrier levels 6 2.3.2 Modu
24、lation factor 6 2.3.3 Reference modulation factor 6 2.4 Radio-frequency input signals 6 2.5 Measuring system and test instruments 6 2.5.1 Audio filters 6 2.5.2 Audio-frequency spectrum analyzer 6 2.5.3 Audio voltmeter 6 2.5.4 Psophometer (weighted noise meter) 6 2.6 Standard measuring conditions 7 2
25、.6.1 Standard r.f. television signal 7 2.6.2 Standard r.f. input signal levels 7 2.6.3 Standard output power and voltage 7 2.6.4 Standard receiver settings 7 2.7 General methods of measurement 7 3 Audio-frequency output power 8 3.1 Definition 8 3.2 Audio-frequency substitute load 8 3.3 Measurement o
26、f audio-frequency output power 8 4 Audio-frequency characteristics 8 4.1 Amplitude response to audiofrequencies 8 4.1.1 Audio-frequency response characteristics 8 4.1.2 Characteristics of tone control or equalizer 9 4.1.3 Characteristics of loudness control 9 4.1.4 Volume control characteristic 9 4.
27、2 Audio-frequency non-linear distortion 9 4.2.1 Introduction 9 4.2.2 Total harmonic distortion 9 4.2.3 Intermodulation 10 Page 5 Internally generated interference 10 5.1 Buzz 10 5.1.1 Definition 10 5.1.2 Method of measurement 10 5.1.3 Presentation of results 11 5.2 Hum 11 5.2.1 Definition 11 5.2.2 M
28、ethod of measurement 11 5.2.3 Presentation of results 11 5.3 Line-scan frequency interference 11 5.3.1 Definition 11 5.3.2 Method of measurement 11 5.4 Amplitude modulation suppression ratio 11 5.4.1 Definition 11 5.4.2 Method of measurement 12 5.4.3 Presentation of results 12 6 Sensitivity 12 6.1 S
29、ignal-to-noise ratio 12 6.1.1 Definition 12 6.1.2 Method of measurement 12 6.1.3 Presentation of results 13 6.2 Ultimate signal-to-noise ratio 13 6.2.1 Definition 13 6.2.2 Method of measurement 13 6.3 Noise-limited sensitivity 13 6.3.1 Definition 13 6.3.2 Method of measurement 13 6.3.3 Presentation
30、of results 13 7 Immunity to undesired signals 13 7.1 Introduction 13 7.2 Basic method of measurement 13 7.2.1 Measurement set-up 13 7.2.2 Measurement procedure 14 7.3 Presentation of results 14 Annex A (informative) Bibliography 19 Annex ZA (normative) Normative references tointernational publicatio
31、ns with their corresponding European publications 20 Figure 1 200 Hz to 15 kHz bandpass filter 16 Figure 2 22,4 Hz to 15 kHz bandpass filter 16 Figure 3 Measurement of amplitude modulation suppression ratio 17 Figure 4 Measurement of signal-to-noise ratio 17 Figure 5 Measurement of wanted-to-unwante
32、d r.f. signal ratio 18 Table 1 Preferred frequencies 154 blankEN60107-2:1997 BSI 09-1999 5 1 General 1.1 Scope This part of IEC107 deals with the general methods of measurement of the audio channels of receivers for monophonic systems and multichannel sound systems. General considerations for the me
33、asurements are specified in IEC107-1 and the measurements specific to the multichannel sound systems are dealt with by IEC107-3, IEC107-4 and IEC107-5. Measurements for non-broadcast signals are dealt with by IEC107-6. This standard deals with the determination of performance and permits the compari
34、son of equipment by listing the characteristics 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
35、IEC65 1 1)or other appropriate IEC safety standards, nor with radiation and immunity, for which reference should be made to CISPR13 and CISPR2023. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part o
36、f IEC107. At 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 IEC107 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated bel
37、ow. Members of IEC and ISO maintain 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 meth
38、ods of measurement on receivers for television broadcast transmissions Part 3: Electrical measurements on multichannel sound television receivers using subcarrier systems. IEC 107-4:1988, Recommended methods of measurement on receivers for television broadcast transmissions Part 4: Electrical measur
39、ements on multichannel sound television receivers using the two-carrier FM-system. IEC 107-5:1992, Recommended methods of measurement on receivers for television broadcast transmissions Part 5: Electrical measurements on multichannel sound television receivers using the NICAM two-channel digital sou
40、nd-system. IEC 107-6:1989, Recommended methods of measurement on receivers for television broadcast transmissions Part 6: Measurement under conditions different from broadcast signal standards. IEC 268-1:1985, Sound system equipment Part1:General. IEC 268-2:1987, Sound system equipment Part2:Explana
41、tion of general terms and calculation methods. IEC 268-3:1988, Sound system equipment Part3:Amplifiers. IEC 268-5:1989, Sound system equipment Part5:Loudspeakers. IEC 315-1:1988, Methods of measurement on radio receivers for various classes of emission Part1:General considerations and methods of mea
42、surement, including audio-frequency measurements. Recommendation ITU-R BS 468-4:1994, Measurement of audio-frequency noise voltage level in sound broadcasting. 1.3 Definitions For the purpose of this part of IEC107 the definitions in IEC107-1, clause2, as well as the following definition apply. 1.3.
43、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 IEC107-1. 2.2 Audio-frequency input signal 2.2.1 Standard reference frequency The standard reference f
44、requency for audio-frequency measurements and for adjustment purposes is1kHz. NOTEIn the BTSC multichannel sound system, the standard reference frequency for modulation is300Hz. 1) Figures in square brackets refer to the bibliography given inAnnex A.EN60107-2:1997 6 BSI 09-1999 2.2.2 Audiofrequencie
45、s 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
46、Table 1 (seeIEC268-1). Use of frequencies other than those indicated may be necessary for certain purposes, for example at frequencies at which anomalies are observed. 2.3 Radio-frequency (r.f.) television signal 2.3.1 Carrier levels See 3.3.1 of IEC107-1. It should be noted that the level of a radi
47、o-frequency television signal is expressed by the level of the modulated vision carrier even when the measurements are made on the audio channels. Thelevel of the sound carrier is set to the nominal vision-to-sound power ratio defined by the television standard for which the receiver under test is d
48、esigned. 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
49、using an amplitude-modulated sound carrier or subcarrier, the modulation percentage; for systems using a frequency-modulated sound carrier or subcarrier, the ratio of the actual frequency deviation to the maximum deviation defined for the system as a percentage; for systems using a digitally modulated sound carrier, the level referred to full-scale level of an audio channel in decibels. NOTE Modulation with the control signals for multichannel sound systems is not included in the factor. 2.3
