BS EN 60244-12-1-1994 Methods of measurement for radio transmitters - Guideline for drawing up descriptive leaflets for transmitters and transposers for sound and television broadc.pdf

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 621.397.13:621.396.6:621.317.3.08BSEN 60244-12-1:1994 This British Standard, having been prepared under the directionof the Electronic Equipment Standards Policy Committee, was published underthe authority of the Standards Board and comesinto

3、effect on 15October1994 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference EEL/25 Special announcement in BSINews, September 1993 ISBN 0 580 23452 5 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under w

4、hose supervision this European Standard was prepared, comprises the national committees 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 publi

5、cation Amd. No. Date CommentsBSEN60244-12-1:1994 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN 60244-12-1 3 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references

6、Inside back coverBSEN 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 transmitters Part12:Gui

7、deline 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 by the Internationa

8、l 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 characteristics, lists essent

9、ial 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 60244-12-2:1994 It is a

10、nticipated 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 for their correct

11、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, theEN title page, pages2to 16, an inside back cover and a back cover. This standard has been updat

12、ed (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60244-12-1 April 1993 UDC 621.397.13:621.396.6:621.317.3.08 Supersedes HD 236.12.1 S1:1991 Descriptors: Sound

13、 broadcasting, television broadcasting, radio equipment, transmitter, characteristic, specification English version Methods of measurement for radio transmitters Part12:Guideline for drawing up descriptive leaflets for transmitters and transposers for sound and television broadcasting Characteristic

14、s to be specified (IEC 244-12-1:1989) Mthodes de mesure applicables aux metteursradiolectriques Douzimepartie:Guide de rdaction des feuilles de spcification des metteurs et des rmetteurs de tlvision et de radiodiffusion sonore Caractristiques spcifier (CEI 244-12-1:1989) Meverfahren fr Funksender Te

15、il12:Anleitung zur Erstellung von Datenblttern fr Funksender und Umsetzer fr Fernseh- und Tonrundfunk AnzugebendeKennwerte (IEC 244-12-1:1989) This European Standard was approved by CENELEC on 1993-03-09. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate t

16、he 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. This European Standard exis

17、ts 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 members are the national elect

18、rotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Ele

19、ctrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref. No. EN 60244-12-1:1993 EEN 60244-12-1:1993 2 BSI 12-1999 Foreword At the request of 72nd Technical Board, HD236.12.1 S1:1991 (IEC 24

20、4-12-1:1989) 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 60244-12-1 on9March 1993. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In t

21、his standard, Annex ZA is normative. Contents Page Foreword 2 Introduction 3 1 Scope 3 2 Object 3 3 General notes on the format of the leaflet 3 Section 1. General characteristics applicable to all categories of transmitters and transposers 4 Introduction 3 5 Characteristics 3 Section 2. Performance

22、 characteristics for televisiontransmitters 6 Introduction 6 7 Characteristics of the vision section 6 8 Characteristics of the sound section 8 Section 3. Performance characteristics for televisiontransposers 9 Introduction 9 10 Characteristics of the vision channel 9 11 Characteristics of the sound

23、 channel 11 Section 4. Performance characteristics for transmitters for FM sound broadcasting 12 Introduction 11 13 Characteristics 11 Section 5. Performance characteristics for amplitude modulated sound transmitters 14 Introduction 12 15 Characteristics 12 Section 6. Performance characteristics for

24、 transposers for FM sound broadcasting 16 Introduction 13 17 Characteristics 14 Section 7. Performance characteristics for vestigial sideband demodulators (Underconsideration) Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European p

25、ublications 16 latest date of publication of an identical national standard (dop) 1994-06-01 latest date of withdrawal of conflicting national standards (dow) EN60244-12-1:1993 BSI 12-1999 3 Introduction As an interim measure and in order to ease the updating of references made to publications deali

26、ng 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, describing recomm

27、ended 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 manufacturers descriptive l

28、eaflets 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; to list the essenti

29、al 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 need not form but m

30、ay 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 characteristics specific to a pa

31、rticular 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 following technical inform

32、ation: 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) figures about coo

33、ling 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 used in power stages.

34、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 definitions given in this stan

35、dard 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 categories of transm

36、itters 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 publications. 5 Characteri

37、stics 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 broadcasting: CCIR Re

38、commendation 450; for AM sound broadcasting: CCIR Report 458. 5.2 Frequency range The frequency range refers to the frequency band (orbands) in which the transmitter or transposer is capable of operating. The following details shall be specified: the lower and upper limits of the frequency band (or

39、bands), expressed in kHz or MHz;EN 60244-12-1:1993 4 BSI 12-1999 information on any frequency dependent components or sub-assemblies in the equipment that shall be replaced or modified to cover the above specified frequency range; the way in which the carrier frequency is generated and whether an ex

40、ternal drive may be used instead; for transposers, the frequency range for reception and for transmission, together with any input and output frequency combinations which shall be avoided; if applicable, the switching time (min. and max.) for a frequency change for transmitters which operate in diff

41、erent 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 the difference, expressed in Hz between the highest and the lowest value of carrier frequency during the following periods of tim

42、e: 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 a transposer, the frequency transposition stability shall be given. 5.4 Intermediate frequencies If the modulation or conversion

43、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 output power (or rated output power range) is the power (or the range of the power) that the transmitter or transposer shall deli

44、ver 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 transposers: the peak envelope power of the vision signal; for FM sound transmitters and transposers: the power of the unmodulated carr

45、ier; 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, the degree of carrier reduction, expressed in dB relative to peak envelope power, shall also be specified. 5.6 Nominal load imp

46、edance 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, shall be specified. 5.7 Load impedance mismatch The voltage standing wave ratio presented by the radio-frequency load impedance mi

47、smatch 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 de

48、vice. Both values shall be specified. 5.8 Nominal input impedance The nominal input impedance, i.e. the nominal value of the impedance presented at the input connector (or connectors) of the transmitter or transposer, shall be specified in ohms, balanced or unbalanced. If a high-impedance audio-freq

49、uency input is used, the reactive part of the impedance shall also be given. 5.9 Nominal input impedance mismatch The nominal input impedance mismatch relates to the mismatch measured at the input connector (orconnectors) for any frequency within the audio-frequency or video-frequency bandwidth, or the radio-frequency channel bandwidth. It is expressed in terms of the ratio of the incident wave to the reflected wave. The minimum value of this ratio shall be stated in decibels. 5.10 Nominal inp