1、BRITISH STANDARD BS EN 60244-9:1995 IEC 244-9: 1993 Methods of measurement for radio transmitters Part 9: Performance characteristics for television transposers The European Standard EN 60244-9:1994 has the status of a British StandardBSEN 60244-9:1995 This British Standard, having been prepared und
2、er the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comesintoeffect on 15 August 1995 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference EPL/12 Special announcement in BSINews March 1995 ISBN
3、 0 580 24668 X Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee EPL/12, Radiocommunication, upon which the following bodies were represented: British Broadcasting Corporation British Radio and Electronic Equipment Manufact
4、urers Association British Telecommunications plc Institution of Electrical Engineers Radio, Electrical and Television Retailers Association Radiocommunications Agency Amendments issued since publication Amd. No. Date CommentsBSEN 60244-9:1995 BSI 01-2000 i Contents Page Committees responsible Inside
5、 front cover National foreword ii Foreword 2 Text of EN 60244-9 3 List of references Inside back coverBSEN 60244-9:1995 ii BSI 01-2000 National foreword This British Standard has been prepared by Technical Committee EPL/12 and is the English language version of EN 60244-9:1994 Methods of measurement
6、 for radio transmitters. Part 9: Performance characteristics of television transposers, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 244-9:1993, published by the International Electrotechnical Commission (IEC) and is part of a series de
7、scribing recommended methods of measurement for assessing the performance of radio transmitters. This Part describes the methods of measurement for assessing the performance characteristics of television transposers and is intended to be used for type tests and acceptance or factory tests. Reference
8、 is also made to methods described in other publications listed in clause 2 of this Part. To facilitate reproduction, some of the figures retain the French text. Textual errors. When implementing the English language version of EN 60244-9 as the national standard, the textual errors listed below wer
9、e discovered. They have been reported to the IEC and to CENELEC in a proposal to amend the text of the international and European Standards. On page 2, the endorsement notice carries an editorial correction which, in the interests of clarity, has not been implemented in the text. On pages 19 and 20,
10、 the figures in Annex A which are labelled as Figure 1, Figure 2 and Figure 3 should be labelled respectively as Figure A.1, FigureA.2 and Figure A.3. Other Parts of BS EN 60244 published to date are: Part 5:1995, Performance characteristics of television transmitters. Part 8:1995, Performance chara
11、cteristics of vestigial-sideband demodulators used for testing television transmitters and transposers. Part 10:1993, Methods of measurement for television transmitters and transposers employing insertion test signals. Part 11:1993, Transposers for FM sound broadcasting. Part 12:1994, Guideline for
12、drawing up descriptive leaflets for transmitters and transposers for sound and television broadcasting. Section 12.1:1994, Characteristics to be specified. Section 12.2:1994, Characteristics to be specified. Part 13:1993, Performance characteristics for FM sound broadcasting. It is anticipated that
13、other Parts of IEC Publication 244 will be published as identical British Standards, subject to their harmonization by CENELEC. Cross-references Publication referred to Corresponding British Standard EN 60215:1989 BS 3192:1990 Safety requirements for radio transmitting equipment BS EN 60244 Methods
14、of measurement for radio transmitters EN 60244-5:1994 Part 5:1995 Performance characteristics of television transmitters EN 60244-10:1993 Part 10:1993 Methods of measurement for television transmitters and transposers employing insertion test signals Part 12 Guideline for drawing up descriptive leaf
15、lets for transmitters and transposers for sound and television broadcasting EN 60244-12-1:1993 Section 12.1:1994 Characteristics to be specified EN 60244-12-2:1993 Section 12.2:1994 Specification sheetsBS EN 60244-9:1995 BSI 01-2000 iii A British Standard does not purport to include all the necessar
16、y 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. Publication referred to Corresponding British Standard EN 60244-13:1993 Part 13:1993 Performance charact
17、eristics for FM sound broadcasting Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, theENtitle page, pages 2 to 24, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This w
18、ill be indicated in the amendment table on the inside front cover.iv blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60244-9 September 1994 ICS 33.060.20 Supersedes HD 236.9 S1:1984 Descriptors: Radio transmitters, measurement, television, transposers, properties Englishversion Methods of
19、measurement for radio transmitters Part9:Performance characteristics for television transposers (IEC 244-9:1993) Mthodes de mesure applicables aux metteursradiolectriques Partie 9: Qualit de fonctionnement des rmetteurs de tlvision (CEI 244-9:1993) Meverfahren fr Funksender Teil9:bertragungs-eigensc
20、haften von Fernsehumsetzern (IEC 244-9:1993) This European Standard was approved by CENELEC on 1994-07-05. 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 alte
21、ration. 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 t
22、ranslation 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, Germany, Greece, Iceland, Ir
23、eland, 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 Stassar
24、t 35, B-1050 Brussels 1994 Copyright reserved to CENELEC members Ref. No. EN 60244-9:1994 EEN 60244-9:1994 BSI 01-2000 2 Foreword The CENELEC questionnaire procedure, performed for finding out whether or not the International Standard IEC 244-9:1993 could be accepted without textual changes, has sho
25、wn that no common modifications were necessary for acceptance as a European Standard. The reference document was submitted to the CENELEC members for formal vote and was approved by CENELEC as EN 60244-9 on 5 July 1994. The following dates were fixed: Annexes designated “normative” are part of the b
26、ody of the standard. Annexes designated “informative” are given only for information. In this standard, Annex A, Annex B, and Annex ZA are normative and Annex C is informative. Endorsement notice 1) The text of the International Standard IEC 244-9:1993 was approved by CENELEC as a European Standard
27、without any modification. The following editorial correction applies to the English text of IEC 244-9:1993: Replace the title of Figure 1 by: Example for a template for an amplitude/intermediate frequency and amplitude/radio frequency characteristic for Systems B and G. Contents Page Foreword 2 Intr
28、oduction 3 1 Scope 3 2 Normative references 3 3 General terms and definitions 3 4 General conditions of operation 4 5 General conditions of measurements 4 6 General transposer characteristics 5 7 Stability of the characteristic vision levels and output power 9 8 Linear distortion 10 9 Non-linear dis
29、tortion 11 10 Wave-form distortion 12 11 Unwanted modulation 13 12 Unwanted emissions and changes in performance caused by feedback from output to input 15 13 Impairments of the performance caused by coupling between output and input 16 14 Special measurements for data signals in the vision signal 1
30、7 15 Method of measurement of the sound channel(s) 17 Annex A (normative) Input and output signalarrangements 19 Annex B (normative) Input impedance 21 Annex C (informative) Noise figure and signal-to-noise ratios 21 Annex ZA (normative) Other international publications quoted in this standard with
31、thereferences of the relevant European publications 24 Figure 1 Example for a template for anamplitude/radiofrequency characteristic forsystems B and G 18 Figure 1 Arrangement A using a three (Four) radio-frequency generators 19 Figure 2 Arrangement B using a double-sideband test modulator 20 Figure
32、 3 Arrangement C using a test transmitter 20 Table C.1 Amplitude relationships and correctionfactors for converting signal-to-noise ratios 23 latest date of publication ofan identical national standard (dop) 1995-07-15 latest date of withdrawal ofconflicting national standards (dow) 1995-07-15 1) Se
33、e national foreword for details of textual error.EN 60244-9:1994 BSI 01-2000 3 Introduction International Standard IEC 244-9 is one of a series of parts of IEC 244. A number of existing parts of IEC 244 are currently under review and several of these will be revised or withdrawn. When this process i
34、s complete, this series of publications will comprise one part dealing with general characteristics, with cross-references to relevant CCIR publications and the Radio Regulations, and a number of specialized parts, each dealing with particular types of transmitters. 1 Scope This part of IEC 244 cont
35、ains the method of measurement to assess the performance characteristics of television transposers. To assess all other characteristics, this standard is to be used in conjunction with the publications quoted in clause 2. This standard is intended to be used for type tests and acceptance or factory
36、tests. It is not mandatory to measure all the described characteristics. Additional measurements may be carried out by agreement between customer and manufacturer. The performance characteristics measured in accordance with this standard makes possible the comparison of the results of measurements m
37、ade by different observers. Limiting values for acceptable performance are not covered by this standard but, in connection with the presentation of measured characteristics, some data are given for clarity. 2 Normative references The following normative documents contain provisions which, through re
38、ference in this text, constitute provisions of this part of IEC 244. 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 IEC 244 are encouraged to investigate the possibility of applying the m
39、ost recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 215:1987, Safety requirements for radio transmitting equipment. Amendment 1 (1990) IEC 244-1:1968, Methods of measurement for radio transmitters P
40、art 1: General conditions of measurement frequency, output power and power consumption (revision under consideration). IEC 244-5:1992, Methods of measurement for radio transmitters Part 5: Performance characteristics of television transmitters. IEC 244-10:1986, Methods of measurement for radio trans
41、mitters Part 10: Methods of measurement for television transmitters and transposers employing insertion test signals. 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 broa
42、dcasting Characteristics to be specified. IEC 244-12-2:1989, Methods of measurement for radio transmitters Part 12: Guideline for drawing up descriptive leaflets for transmitters and transposers for sound and television broadcasting Specification sheets. IEC 244-13:1991, Methods of measurement for r
43、adio transmitters Part 13: Performance characteristics for FM sound broadcasting. IEC 487-1:1984, Methods of measurement for equipment used in terrestrial radio-relay systems Part 1: Measurements common to sub-systems and simulated radio-relay systems. IEC 864-1:1986, Standardization of interconnect
44、ions between broadcasting transmitters or transmitter systems and supervisory equipment Part 1: Interface standards for systems using dedicated interconnections. Amendment 1 (1987) CCIR Recommendation 468-4:1986, Measurement of audio frequency noise voltage level in sound broadcasting. CCIR Recommen
45、dation 567-1:1986, Transmission performance of television circuits designed for use in international connections. CCIR Recommendation 653:1986, Teletext systems. CCIR Report 624-3:1986, Characteristics of television systems. CCIR Report 795-2:1986, Transmission of two or more sound programmes or inf
46、ormation channels in television. 3 General terms and definitions 3.1 television transposer the term “television transposer” is used in this standard to refer to the equipment in a television relay station which is connected between the feeder terminations of the receiving aerial and the transmitting
47、 aerial and in which a frequency transposition is performed without demodulation and modulationEN 60244-9:1994 4 BSI 01-2000 in some television relay stations, equipment is used in which no frequency transposition takes place. Such equipment is termed an “active deflector”. Most of the measurements
48、described in this standard also apply to active deflectors 3.2 description of the television system and other relevant information see Annex A of IEC 244-5 3.3 definition of performance characteristics the definitions are given in the clause describing the method of measurements, and are in line wit
49、h those given in IEC 244-12 3.4 standard video test signals the video test signals are identified by a letter symbol. They are described in Annex B of IEC 244-5 3.5 Definitions relating to the transposer output signal 3.5.1 rated output power the rated output power is defined as the peak envelope power of the vision signal. The term “rated output power” is used for various measurements in this standard 3.5.2 reference output level the reference output level is the level corresponding to the specified rated o
