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1、BRITISH STANDARD BS EN 60244-12-1: 1994 IEC 244-12-1: 1989 Methods of measurement for radio transmitters Part 12: Guideline for drawing up descriptive leaflets for transmitters and transposers for sound and television broadcasting Section 12.1 Characteristics to be specified The European Standard EN
2、 60244-12-1:1993 has the status of a British Standard UDC 621.397.13:621.396.6:621.317.3.08 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:20:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60244-12-1:1994 This British Standard, having been prepared under the direction of the Electron
3、ic Equipment Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 October 1994 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference EEL/25 Special announcement in BSI News, September 1993 ISBN 0
4、580 23452 5 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries: AustriaItaly BelgiumLuxembourg DenmarkNetherlands FinlandNorway Fran
5、cePortugal GermanySpain GreeceSweden IcelandSwitzerland IrelandUnited Kingdom Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:20:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60244-12-1:1994 BSI 12-1999i Contents Page Cooperati
6、ng organizationsInside front cover National forewordii Foreword2 Text of EN 60244-12-13 National annex NA (informative) Committees responsibleInside back cover National annex NB (informative) Cross-referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:20:12 GMT+00:00
7、2006, Uncontrolled Copy, (c) BSI BS EN 60244-12-1:1994 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Electronic Equipment Standards Policy Committee and is the English language version of EN 60244-12-1:1993 Methods of measurement for radio transm
8、itters Part 12: Guideline for drawing up descriptive leaflets for transmitters and transposers for sound and television broadcasting Characteristics to be specified, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 244-12-1:1989, published
9、by the International Electrotechnical Commission (IEC) and is part of a series describing recommended methods of measurement for assessing the performance of radio transmitters. This Part applies to manufacturers descriptive leaflets and specifies uniform methods of expressing performance characteri
10、stics, lists essential characteristics and technical information needed for approving and comparing equipment, and provides any relevant cross-references to standardized methods of measurement for the performance characteristics listed. This Part is intended to be used in conjunction with BS EN 6024
11、4-12-2:1994 It is anticipated that the other Parts of IEC Publication 244 will be published as identical British Standards, subject to their harmonization by CENELEC. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible
12、 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 and ii, the EN title page, pages 2 to 16, an inside back cover and a back cover. This s
13、tandard 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. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:20:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENN
14、E EUROPISCHE NORM EN 60244-12-1 April 1993 UDC 621.397.13:621.396.6:621.317.3.08Supersedes HD 236.12.1 S1:1991 Descriptors: Sound broadcasting, television broadcasting, radio equipment, transmitter, characteristic, specification English version Methods of measurement for radio transmitters Part 12:
15、Guideline for drawing up descriptive leaflets for transmitters and transposers for sound and television broadcasting Characteristics to be specified (IEC 244-12-1:1989) Mthodes de mesure applicables aux metteurs radiolectriques Douzime partie: Guide de rdaction des feuilles de spcification des mette
16、urs et des rmetteurs de tlvision et de radiodiffusion sonore Caractristiques spcifier (CEI 244-12-1:1989) Meverfahren fr Funksender Teil 12: Anleitung zur Erstellung von Datenblttern fr Funksender und Umsetzer fr Fernseh- und Tonrundfunk Anzugebende Kennwerte (IEC 244-12-1:1989) This European Standa
17、rd was approved by CENELEC on 1993-03-09. 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 bibliographical references concernin
18、g 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 CENELEC member into its
19、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, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, S
20、weden, 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-1050 Brussels 1993 Copyright reserved to CENELEC members
21、Ref. No. EN 60244-12-1:1993 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:20:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60244-12-1:1993 2 BSI 12-1999 Foreword At the request of 72nd Technical Board, HD 236.12.1 S1:1991 (IEC 244-12-1:1989) was submitted to the CENELEC voting proce
22、dure for conversion into a European Standard. The text of the International Standard was approved by CENELEC as EN 60244-12-1 on 9 March 1993. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Contents Page F
23、oreword2 Introduction3 1Scope3 2Object3 3General notes on the format of the leaflet3 Section 1. General characteristics applicable to all categories of transmitters and transposers 4Introduction3 5Characteristics3 Section 2. Performance characteristics for television transmitters 6Introduction6 7Cha
24、racteristics of the vision section6 8Characteristics of the sound section8 Section 3. Performance characteristics for television transposers 9Introduction9 10Characteristics of the vision channel9 11Characteristics of the sound channel11 Section 4. Performance characteristics for transmitters for FM
25、 sound broadcasting 12Introduction11 13Characteristics11 Section 5. Performance characteristics for amplitude modulated sound transmitters 14Introduction12 15Characteristics12 Section 6. Performance characteristics for transposers for FM sound broadcasting 16Introduction13 17Characteristics14 Sectio
26、n 7. Performance characteristics for vestigial sideband demodulators (Under consideration) Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications16 latest date of publication of an identical national standard(dop) 1994-
27、06-01 latest date of withdrawal of conflicting national standards(dow) Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:20:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60244-12-1:1993 BSI 12-19993 Introduction As an interim measure and in order to ease the updating of references made to
28、 publications dealing with methods of measurement with clauses of this standard, tables initially belonging to sections of the different documents composing this standard are published in IEC Publication 244-12-2: Specification sheets. This standard is one of a series of parts of IEC Publication 244
29、, describing recommended methods of measurement for assessing the performance of radio transmitters and shall be used in conjunction with IEC Publication 244-12-2 regularly updated while dedicated parts of IEC Publication 244 are currently being revised. 1 Scope This standard applies to the manufact
30、urers descriptive leaflets providing information on transmitters and transposers for sound and television broadcasting. 2 Object The standard is intended: to lay down uniform methods of expressing the performance characteristics of transmitters and transposers for sound and television broadcasting;
31、to list the essential characteristics and technical information needed for the appraisal and comparison of equipment; to provide, where appropriate, cross references to standardized methods of measurement for the performance characteristics listed. Leaflets prepared in accordance with this standard
32、need not form but may form part of instruction manuals supplied with the equipment. 3 General notes on the format of the leaflet Two categories of characteristics are specified as follows: general characteristics applicable to all categories of transmitters and transposers; performance characteristi
33、cs specific to a particular type of equipment, e.g. a television transmitter or a transposer for frequency-modulated sound broadcasting. The general characteristics cover electrical and other characteristics which can have an effect on the performance of the equipment; they shall include the followi
34、ng technical information: a) functional description of the various items of equipment including block diagrams, where appropriate; b) layout of the equipment and constructional details, including dimensions and weights, of the individual items and ancillary equipment required for normal operation; c
35、) figures about cooling and means and quality of coolant; d) characteristics affecting the environment, e.g. heat dissipation in the transmitter room and acoustic noise; e) type designation of the equipment and individual items, where applicable; f) number and type designation of thermionic tubes us
36、ed in power stages. Some characteristics and/or technical information may not be appropriate to all types of equipment, e.g. low power transmitters. Additional characteristics, other than those mentioned in this standard, may be included in a particular leaflet. As far as practicable, the definition
37、s given in this standard are in accordance with those of the various parts of IEC Publication 244. It should be noted, however, that the definitions are intended for the guidance of authors and should not in general appear in the actual leaflets. Section 1. General characteristics applicable to all
38、categories of transmitters and transposers 4 Introduction The general characteristics described in this section are listed in Table I of IEC Publication 244-12-2. Where appropriate, reference is made in Table I to the standardized methods of measurement and test signals described in other IEC public
39、ations. 5 Characteristics 5.1 Transmission system The transmission system(s) the transmitter or transposer is capable of handling shall be stated and be designated in accordance with the latest issue of the relevant CCIR Recommendation or Report, e.g.: for television: CCIR Report 624; for FM sound b
40、roadcasting: CCIR Recommendation 450; for AM sound broadcasting: CCIR Report 458. 5.2 Frequency range The frequency range refers to the frequency band (or bands) in which the transmitter or transposer is capable of operating. The following details shall be specified: the lower and upper limits of th
41、e frequency band (or bands), expressed in kHz or MHz; Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:20:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60244-12-1:1993 4 BSI 12-1999 information on any frequency dependent components or sub-assemblies in the equipment that shall be replace
42、d or modified to cover the above specified frequency range; the way in which the carrier frequency is generated and whether an external drive may be used instead; for transposers, the frequency range for reception and for transmission, together with any input and output frequency combinations which
43、shall be avoided; if applicable, the switching time (min. and max.) for a frequency change for transmitters which operate in different bands or in different frequencies within a band (see short wave transmitters). 5.3 Carrier frequency stability The carrier frequency stability shall be specified as
44、the difference, expressed in Hz between the highest and the lowest value of carrier frequency during the following periods of time: 1 h for short-term stability, and six months for long-term stability. For a television transmitter, the stability of both sound and vision carriers shall be given. For
45、a transposer, the frequency transposition stability shall be given. 5.4 Intermediate frequencies If the modulation or conversion process is carried out at intermediate frequencies, the intermediate frequency or frequencies shall be stated. 5.5 Rated output power (rated output power range) The rated
46、output power (or rated output power range) is the power (or the range of the power) that the transmitter or transposer shall deliver at its output under specified conditions of operation. The rated output power, expressed in W or kW, shall be stated as follows: for television transmitters and transp
47、osers: the peak envelope power of the vision signal; for FM sound transmitters and transposers: the power of the unmodulated carrier; for double-sideband AM sound transmitters: the power of the unmodulated carrier; for single-sideband AM sound transmitters: the peak envelope power. In this last case
48、, the degree of carrier reduction, expressed in dB relative to peak envelope power, shall also be specified. 5.6 Nominal load impedance The nominal load impedance, i.e. the nominal value of the radio-frequency impedance into which the transmitter or transposer shall deliver its rated output power, s
49、hall be specified. 5.7 Load impedance mismatch The voltage standing wave ratio presented by the radio-frequency load impedance mismatch concerns both: a) the maximum V.S.W.R. up to which the transmitter or transposer is capable of operating within the performance specifications; b) the maximum V.S.W.R. for which the transmitter or transposer is capable of operating without damage or without the intervention of a protective device. Both values shall be specified. 5.8 Nominal input impedance T