1、 CENELEC EN*b0244-9 94 3404583 0358306 524 W BRITISH STANDARD 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 Standard BS EN 60244-9 : 1995 IEC 244-9 : 1993 CENELEC ENub02
2、44-9 94 m 3404583 0358307 460 m Amd. No. BS EN 60244-9 : 1995 Date Ext affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Echnical Committee EPL/ 12, Radiocommunication, upon which the following bodies were represented : British Broadc
3、asting Corporation British Radio and Electronic Equipment Manufacturers Association British Ilecommunications plc Institution of Electrical Engineers Radio, Electrical and %levision Retailers Association Radiocommunications Agency This British Standard, having been prepared under the direction of th
4、e Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 August 1995 O BSI 1995 Amendments issued since publication I I The following BI references relate to the work on this standard: Committee reference EPL/ 12 Special announcement in BS
5、I Naos March 1995 ISBN O 680 24668 X CENELEC EN*b02LiLi-9 9L-I m 3Li04583 0158308 3T7 m BS EN 60244-9 : 1995 Contents Committees responsible National foreword Page Inside front cover ii Foreword Rxt of EN 60244-9 2 3 i CENELEC ENmb0244-9 94 m 3404583 0158309 233 m BS EN 60244-9 : 1995 National forew
6、ord This British Standard has been prepared by Bchnical Committee EPL/12 and is the English language version of EN 60244-9 : 1994 Methods of masurement for radio transmitters. Part 9: Perifomzance characteristics of television tramposers, published by the European Committee for Electrotechnical Stan
7、dardization (CENELEC). It is identical with IEC 244-9 : 1993, published 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 describes the methods of measurement for
8、 assessing the performance characteristics of television transposers and is intended to be used for type tests and acceptance or factory tests. Reference is also made to methods described in other publications listed in clause 2 of this Part. l facilitate reproduction, some of the figures retain the
9、 French text. Textual errors. When implementing the English language version of EN 60244-9 as the national standard, the textual errors listed below were 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
10、 2, the endorsement notice carries an editorial correction which, in the interests of clarity, has not been implemented in the text. On pages 36 and 37, the figures in annex A which are labelled as Figures 1, 2 and 3 should be labelied respectively as Figures Al, A2 and A3. Other Parts of BS EN 6024
11、4 published to date are: part 5 : 1995 Part 8 : 1995 Part 10 : 1993 Part 11 : 1993 Part 12 : Section 12.1 : 1994 Section 12.2 : 1994 Part 13 : 1993 F?qfnce characteristics of temon transmitters Pqj%rmance characteristics of vestigial-sideband demodulators used for testing television transmitters and
12、 tramposers Methods of masur- for television transmitters and transposers mploging insertion test signals Tramposers for FMsmnd broadcasting Guideline for drawing up descriptive leafits for transmitters and tramposers for sound and television broadcasting Characterstics to be specvied Characteristic
13、s to be specvied Femnance characteristics for FMsound broadcasting It is anticipated that other Parts of IEC Publication 244 will be published as identical British Standards, subject to their harmonization by CENELEC. u CENELEC EN*b0244-9 94 3404583 OL583LO T55 BS EN 60244-9 : 1995 Cross-references
14、Publication referred to EN 60215 : 1989 EN 60244-5 : 1994 EN 60244-10 : 1993 EN 60244-12-1 1993 EN 60244-12-2 1993 EN 60244-13 : 1993 Corresponding British Standard BS 3192 : 1990 Safety requirements for radio transmitting equi- BS EN 60244 Methods of meclsurement for radio transmitters Part 5 : 199
15、5 Fkomurnce character2stics of television transmitters Part 10 : 1993 Methods of masurement for television transmitters and transposers employing insertion test Part 12 Guideline for drawing up dacriptive leam for transmitters and transposers for sound and television broadcasting Section 12.1 : 1994
16、 Churactemstics to be specified Section 12.2 : 1994 Speccation sheets Part 13 : 1993 Fkorrnance churacteristcs for FMscncnd broadcasting SWk Compliance with a British Standard does not of itself confer immunity from legal obligations. iii CENELEC ENxb0244-9 94 W 3404583 0158313 991 W EUROPEAN STANDA
17、RD EUROPISCHE NORM NORME EUROPENNE EN 60244-9 September 1994 ICs 33.060.20 Supersedes HD 236.9 S1 : 1984 Descriptors: Radio transmitters, measurement, television, transposers, properties English version Methods of measurement for radio transmitters Part 9: Performance characteristics for television
18、transposers (IEC 244-9 1993) Mthodes de mesure applicables aux metteurs radiolectriques Partie 9: Qualit de fonctionnement des MeBverfahren fr Funksender Teil 9: bertragungs-eigenschaften von Fernsehumsetzern rmetteurs de tlvision (CE1 244-9 : 1993) (IEC 244-9 : 1993) This European Standard was appr
19、oved by CENELEC on 1994-07-05. CENELEC members are bound to comply with the CENKENELEC 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 natio
20、nal 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 own language
21、 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, Sweden, Switz
22、erland 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 O 1994 Copyright reserved to CENELEC members Ref. No. E
23、N 60244-9 : 1994 E CENELEC EN*b0244-9 94 3404583 0158312 828 Page 2 EN 60244-9 : 1994 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 shown that no common modifications w
24、ere 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: - latest date of publication of an identical national standard (dop) 1995-07-15 -
25、 latest date of withdrawal of conflicting national standards (dow) 1995-07-15 Annexes designated normative are part of the body of the standard. Annexes designated informative are given only for information. In this standard, annexes A, B, and ZA are normative and annex C is informative. Endorsement
26、 notice* The text of the International Standard IEC 244-9 : 1993 was approved by CENELEC as a European Standard wit hou t 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 amplitudeh
27、ntermediate frequency and amplitudehdio frequency characteristic for Systems B and G. * See national foreword for details of textual error. . CENELEC EN*b0244-9 94 3404583 0358333 764 Page 3 EN 60244-9 : 1994 CONTENTS Page INTRODUCTION . 4 Chuse 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Scope . Normative
28、references . General terms and definitions . General conditions of operation General conditions of measurements General transposer characteristics Stability of the characteristic vision levels and output power . Linear distortion Non-linear distortion . Wave-form distortion Unwanted modulation Unwan
29、ted emissions and changes in performance caused by feedback from output to input Impairments of the performance caused by coupling between output and input Special measurements for data signals in the vision signal . Method of measurement of the sound channel(s) 5 5 6 7 8 10 16 17 21 23 24 27 30 31
30、31 Annexes A (normative) Input and output signal arrangements B (normative) Input impedance . 35 38 C (informative) Noise figure and signal-to-noise ratios . 40 ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications 44 - CENE
31、LEC EN*b0244-9 94 3404583 0158314 bTO W Page 4 EN 60244-9 : 1994 INTRO DUCTION 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 is complete, t
32、his 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. - CENELEC ENmb0244-9 94 m 3404583 0158315 537
33、m Page 5 EN 60244-9 : 1994 METHODSOFMEASUREMENT FOR RADIO TRANSMITTERS Part 9: Performance characteristics of television transposers 1 Scope This part of IEC 244 contains the method of measurement to assess the performance characteristics of television transposers. To assess all other characteristic
34、s, 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 tests. It is not mandatory to measure all the described characteristics. Additional measurements may be carried out by agreement betwe
35、en customer and manufacturer. The performance characteristics measured in accordance with this standard makes possible the comparison of the results of measurements made by different observers. Limiting values for acceptable performance are not covered by this standard but, in connection with the pr
36、esentation of measured characteristics, some data are given for clarity. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 244. At the time of publication, the editions indicated were valid. Al
37、l normative documents are subject to revision, and parties to agree- ments based on this part of IEC 244 are encouraged to investigate the possibility of apply- ing the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid Inter
38、national Standards. IEC 21 5: 1987, Safety requirements for radio transmitting equipment Amendment 1 (1990) IEC 244-1: 1968, Methods of measurement for radio transmitters - Part 7: General conditions of measuremenf frequency, output power and power consumption (revision under consideration) IEC 244-
39、5: 1992, Methods of measurement for radio transmitters - Part 5: Performance characteristics of tele vision transmitters IEC-244-10: 1986. Methods of measurement for radio transmitters - Part 70: Methods of measurement for television transmitters and transposers employing insertion test signals CENE
40、LEC EN*h0244-9 94 3404583 015831b 473 Page 6 EN 60244-9 : 1994 IEC 244-1 2-1 : 1989, Methods of measurement for radio transmitters - Part 12: Guideline for drawing up descriptive leaflets for transmitters and transposers for sound and tele- vision broadcasting - Characteristics to be specified IEC 2
41、44-12-2: 1989, Methods of measurement for radio transmitters - Part 12: Guideline for drawing up descriptive leaflets for transmitters and transposers for sound and tele- vision broadcasting - Specification sheets IEC 244-1 3: 1991, Methods of measurement for radiotransmitters - Part 13: Performance
42、 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 interconnections between broadcasting transmit
43、ters 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 Recommendation 567-1 : 1986, Transmission
44、 performance of television circuits de- signed 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 information channels in televisi
45、on. 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 tele- vision relay station which is connected between the fe.eder terminations of the receiving aerial and the transmitting aerial and in which a fre
46、quency transposition is performed without demodulation and modulation. 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 described in this standard also apply to active deflec
47、tors. 3.2 Description of the television system and other relevant information See annex A of IEC 244-5. CENELEC EN*b0244-9 94 3404583 OL583L7 30T D Page 7 EN 60244-9 : 1994 3.3 Definition of performance characteristics The definitions are given in the clause describing the method of measurements, an
48、d are in line with 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 t
49、he 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 output power. 3.6 Definitions relating to the transposer input signal 3.6.1 Input voltage The voltage of the vision signal at the input of a transposer with negative (or positive) modulation of the vision carrier is the r.rn.s. voltage, expressed in millivolts (dB(mV) or microvolts (dB(pV), o
