1、BRITISH STANDARD BS EN 61603-2:1997 IEC 61603-2:1997 Incorporating Amendment No. 1 Transmission of audio and/or video and related signals using infra-red radiation Part 2: Transmission systems for audio wide band and related signals The European Standard EN 61603-2:1997, with the incorporation of am
2、endment A1:2004, has the status of a British Standard ICS 33.160.99 BS EN 61603-2:1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 August 1997 BSI 12 April 2
3、005 ISBN 0 580 27763 1 National foreword This British Standard is the English language version of EN 61603-2:1997, including amendment A1:2004. It is identical with IEC 61603-2:1997, including amendment 1:2004. Together with BS EN 61603-1:1997, it supersedes BS 6418:1983 which was withdrawn on 1997-
4、12-01. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated by !“. The UK participation in its preparation was entruste
5、d by Technical Committee EPL/100, Audio, video and multimedia systems and equipment, to Subcommittee EPL/100/3, Equipment and systems in the field of audio, video and audiovisual engineering, which has the responsibility to: aid enquirers to understand the text; present to the responsible internatio
6、nal/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. This standard should be read in conjunction with BS 7693:1993 Guide to uses of infra-red tra
7、nsmission and the prevention or control of interference between systems. BS EN 61603 will consist of six parts: Part 1: General; Part 2: Transmission systems for audio wide band and related signals; Part 3: Transmission systems for audio signals for conference and similar applications; Part 4: Trans
8、mission systems for low-speed remote control; Part 5: Transmission systems for high-speed data and remote control; Part 6: Transmission systems for video and audiovisual signals of high quality. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cro
9、ss-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of
10、 British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprise
11、s a front cover, an inside front cover, the EN title page, pages 2 to 18, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 15551 12 April 2005 See nationa
12、l forewordEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61603-2 May 1997 + A1 October 2004 ICS 33.160.99 Supersedes HD 455 S1:1985 Descriptors: Sound transmission, electroacoustic equipment, infrared radiation, household appliances, specification, measurements, characteristics, performance ev
13、aluation, electromagnetic compatibility, marking English version Transmission of audio and/or video and related signals using infra-red radiation Part 2: Transmission systems for audio wide band and related signals (includes amendment A1:2004) (IEC 61603-2:1997 + A1:2004) Transmission de signaux aud
14、io et/ou vido et de signaux similaires au moyen du rayonnement infrarouge Partie 2: Systmes de transmission audio large bande et signaux similaires (inclut lamendement A1:2004) (CEI 61603-2:1997 + A1:2004) bertragung von Ton- und/oder Bildsignalen und verwandten Signalen mit Infrarot-Strahlung Teil
15、2: bertragungssysteme fr Breitband-Audio- und verwandte Signale (enthlt nderung A1:2004) (IEC 61603-2:1997 + A1:2004) This European Standard was approved by CENELEC on1997-03-11; amendmentA1 was approved by CENELEC on2004-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regul
16、ations 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 Central Secretariat or to any CENELEC member. Thi
17、s 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 same status as the official versions. CENELEC member
18、s are the national electrotechnical committees of Austria, Belgium, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
19、 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 1997 CENELEC All rights of exploitation in any form and by an
20、y means reserved worldwide for CENELEC members. Ref. No. EN 61603-2:1997 + A1:2004 EEN 61603-2:1997 BSI 12 April 2005 2 Foreword The text of document 100C/37/FDIS, future edition 1 of IEC 61603-2, prepared by SC 100C, Audio, video and multimedia subsystems and equipment, of IEC TC 100, Audio, video
21、and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61603-2 on 1997-03-11. This European Standard supersedes HD 455 S1:1985. This standard is to be used in conjunction with ENV 50185-1:1995. The following dates were fixed: Annexes de
22、signated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 61603-2:1997 was approved by CENELEC as a European Standard without any modification. Foreword to amen
23、dment A1 The text of amendment 1:2004 to the International Standard IEC 61603-2:1997, prepared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the formal vote and was approved by CENELEC as amendment A1 to EN 61603-2:1997 on 2004-09-01 without any modification. The
24、 following dates were fixed: Endorsement notice The text of amendment 1:2004 to the International Standard IEC 61603-2:1997 was approved by CENELEC as an amendment to the European Standard without any modification. latest date by which the EN has to be implemented at national level by publication of
25、 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 latest date by which the amendment has to be implemented at national level by publication of an identical national standard or
26、by endorsement (dop) 2005-09-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2007-09-01EN 61603-2:1997 BSI 12 April 2005 3 Contents Page Foreword 2 1G e n e r a l 5 1.1 Scope 5 1.2 Normative references 5 1.3 Definitions 6 2 Explanation of term
27、s and general information 6 2.1 Transmitter 6 2.2 Combined transmitter and radiator 6 2.3 Radiator 6 2.4 Receiver 6 2.5 Ancillary equipment 6 2.6 Transmission of audio signals 6 2.7 Electromagnetic compatibility 7 2.8 Safety aspects 7 3S y s t e m c o n s i d e r a t i o n s 7 3.1 Area of applicatio
28、n 7 3.2 Operating environment 7 3.3 Household and professional-use equipment 7 3.4 System planning and installation 7 3.5 Partition of functions between elements of the system 7 4 General conditions for measurements 8 4.1 Electrical input to the transmitter 8 Page 5 Characteristics to be specified a
29、nd their methods of measurement 8 5.1 Characteristics of the IR source 8 5.2 Characteristics of the receiver 8 6 Interface (matching) values, performance requirements and recommendations 9 6.1 Interface values for transmitter output signals 9 6.2 Interface values for radiator input signals 9 6.3 Pol
30、arity 10 6.4 Spurious emissions and signals 10 6.5 Sensitivity for random incidence 10 6.6 Rated signal-to-noise ratio 10 6.7 IR wavelength range 10 6.8 Channel allocations and modulation characteristics 11 6.9 Interface values for audio signals 13 6.10 Overall audio frequency performance requiremen
31、ts 13 7 Marking and contents of specifications 13 7.1 Marking 13 7.2 Contents of specifications 13 Figures 14 Annex ZA (normative) Normative references to international publications with their corresponding European publications 174 blankEN 61603-2:1997 BSI 12 April 2005 5 1 General 1.1 Scope This p
32、art of IEC 61603 gives methods for measuring and specifying those characteristics of wide band audio IR transmission systems not covered by Part 1 of this standard (see also 3.1). It allows systems which make different economic use of the available bandwidth to be described in order that conclusions
33、 regarding interference and compatibility can be drawn. Interface (matching) values and other system characteristics are also covered. This part of IEC 61603 replaces Chapter 1 of IEC 60764, which covers only two carrier frequencies for analogue audio signals, and which does not cover digital audio.
34、 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61603. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreem
35、ents based on this part of IEC 61603 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60068-2:1990, Environmental testing Part 2: Te
36、sts. IEC 60169-8:1978, Radio-frequency connectors Part 8: R.F. coaxial connectors with inner diameter of outer conductor 6,5 mm (0,256 in) with bayonet lock Characteristic impedance 50 ohms (type BNC). IEC 60169-24:1991, Radio-frequency connectors Part 24: Radio-frequency coaxial connectors with scr
37、ew coupling, typically for use in 75 ohm cable distribution systems (type F). IEC 60268-15:1996, Sound system equipment Part 15: Preferred matching values for the interconnection of sound system components. IEC 60315-4:1982, Methods of measurement on radio receivers of various classes of emission Pa
38、rt 4: Radio-frequency measurements on receivers for frequency modulated sound-broadcasting emissions. IEC 60581-2:1986, High fidelity audio equipments and systems Minimum performance requirements Part 2: FM radio tuners. IEC 60581-8:1986, High fidelity audio equipments and systems Minimum performanc
39、e requirements Part 8: Combination equipment. IEC 60933, Audio, video and audiovisual systems Interconnections and matching values. IEC 61147:1993, Uses of infra-red transmission and the prevention or control of interference between systems. IEC 61603-1:1997, Transmission of audio and/or video or re
40、lated signals using infra-red radiation Part 1: General. CISPR 13:1996, Limits and methods of measurement of radio interference characteristics of sound and television broadcast receivers and associated equipment. CISPR 20:1996, Limits and methods of measurement of immunity characteristics of sound
41、and television broadcast receivers and associated equipment. ITU-R Recommendation 412-6:1994, Planning standards for FM sound broadcasting at VHF. ITU-R Recommendation 641:1994, Determination of radio-frequency protection ratios for frequency-modulated sound broadcasting. ITU-R Recommendation 704:19
42、94, Characteristics of FM sound broadcasting reference receivers for planning purposes.EN 61603-2:1997 6 BSI 12 April 2005 1.3 Definitions For the purpose of this part of IEC 61603, the definitions given in Part 1 of this standard apply, together with the following. audio wide band audio signal whos
43、e bandwidth is sufficient for the reproduction to resemble a natural sound NOTE The definition includes the high fidelity specification given in IEC 60581, requiring a minimum upper frequency of 12,5 kHz (system response loss k 5 dB, see IEC 60581-8). It further includes audio signals of digital ori
44、gin with upper limit frequencies of about 20 kHz. 2 Explanation of terms and general information 2.1 Transmitter A transmitter (link A-B in Figure 1) has an audio signal input (analogue or digital), and a special form of electrical output to feed a radiator. 2.2 Combined transmitter and radiator A c
45、ombined transmitter and radiator (link A-C in Figure 1) does not have an electrical output, and interface values therefore apply only at the input. 2.3 Radiator A radiator (link B-C in Figure 1) may be combined with other functions, such as a transmitter. At present, radiators normally consist of a
46、number of IREDs employing different technologies. These devices have peak emissions in the wavelength range 830 nm to 950 nm, and an IR bandwidth of about 100 nm. 2.4 Receiver Besides the general characteristics given in Part 1 of this standard, others may need to be specified if a receiver (link C-
47、D in Figure 1) is combined with other functions, such as earphones, to form an IR headphone. To eliminate interference from other modulated IR sources, the receiver shall provide enough selectivity with regard to the modulated subcarrier in addition to selectivity in the IR band. Normally this selec
48、tivity shall correspond to the spectral bandwidth of the modulated subcarrier signal, with some margin for instabilities and possible extra features. Definitions and methods of measurement for selectivity in relation to analogue FM signals are given in the standards dealing with FM broadcast systems
49、, such as IEC 60315-4 and ITU-R Recommendations 412, 641 and 704. NOTE For digital audio transmission, the subject of receiver selectivity is under consideration. 2.5 Ancillary equipment Ancillary equipment, such as power supplies or battery chargers, may be required for the operation of a system. The manufacturer should specify all the data necessary for correct operation and maintenance. 2.6 Transmission of audio signals 2.6.1 Analogue a
