BS EN 61114-2-1997 Methods of measurement on receiving antennas for satellite broadcast transmissions in the 12 GHz band - Mechanical and environmental tests on individual and coll.pdf

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1、BRITISH STANDARD BS EN 61114-2:1997 IEC 1114-2: 1996 Methods of Measurement on receiving antennas for satellite broadcast transmission in the 11/12 GHz band Part 2: Mechanical and environmental tests on individual and collective receiving antennas The European Standard EN61114-2:1996 has the status

2、of a British Standard ICS 33.120.40BSEN 61114-2:1997 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 July 1997 BSI 03-1999 ISBN 0 580 27778 X National foreword T

3、his British Standard is the English language version of EN 61114-2:1996. Itis identical with IEC 1114-2:1996. The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment, which has the responsibility to: aid enquirers to und

4、erstand the text; present to the responsible international/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. A list of organizations represented o

5、n this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact thatAnnex ZA lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European pu

6、blications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users o

7、f British Standards are responsible 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, theEN title page, pages 2 to 22, an inside b

8、ack cover and abackcover. This standard 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. Amendments issued since publication Amd. No. Date CommentsBSEN 61114-2:1997 BSI 03-1999 i Contents Page Nat

9、ional foreword Inside front cover Foreword 2 Text of EN 61114-2 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61114-2 March 1996 ICS 33.120.40 Descriptors: Radiocommunications, satellite broadcasting, receivers, antenna conductor, mechanical tests, environmental tests, measurements,

10、characteristics, testing conditions English version Methods of measurement on receiving antennas for satellite broadcast transmission in the 11/12 GHz band Part 2: Mechanical and environmental tests on individual and collective receiving antennas (IEC 1114-2:1996) Mthodes de mesure pour les antennes

11、 de rception des missions de radiodiffusion par satellite dans la bande 11/12 GHz Partie 2: Essais mcaniques et climatiques sur les antennes de rception usage individuel ou collectif (CEI 1114-2:1996) Meverfahren fr Empfangsantennen fr Satelliten-Rundfunkbertragung im 11/12 GHz-Bereich Teil 2: Mecha

12、nische und klimatische Prfungen an Antennen fr Einzel- und Gemeinschaftsempfang (IEC 1114-2:1996) This European Standard was approved by CENELEC on 1996-03-05. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standa

13、rd 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 exists in three official versions (English, Frenc

14、h, 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 electrotechnical committees of Austria, Belgium, D

15、enmark, 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 Electrotechnique Europisches Komitee fr Elektrot

16、echnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 61114-2:1996 EEN61114-2:1996 BSI 03-1999 2 Foreword The text of document12A/410/FDIS, future edition1 of IEC1114-2, prepared by SC12A (transformed into SC100A, Receiving

17、equipment, of IECTC100, Audio, video and multimedia systems and equipment), was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN61114-2 on1996-03-05. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “i

18、nformative” are given for information only. In this standard,Annex ZA is normative and Annex A and Annex B are informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC1114-2:1996 was approved by CENELEC as a European Standard without any modifica

19、tion. In the official version, forAnnex B, Bibliography, the following notes have to be added for the standards indicated: Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 General explanation of terms 3 4 General notes on measurements 4 5 Methods of measurement 5 Annex A (informative) M

20、easurement method for the r.f. reflection coefficient of the reflecting surface 20 Annex B (informative) Bibliography 22 Annex ZA (normative) Normative references to international publications with their corresponding European publications Inside back cover Figure 1 Operating wind velocity test 13 F

21、igure 2 Survival and destructive wind velocity test 14 Figure 3 Vibration test 15 Figure 4 Impact test 16 Figure 5 Heat cycle diagram 17 Figure 6 Correction factor (C fversus elevation angle ($) of the antenna under test when pointing at the sun 18 Figure 7 Waterproof test 19 Figure A.1 Test equipme

22、nt arrangement 20 Figure A.2 Test probe 21 Figure A.3 Reference short 21 Table 1 Environmental conditions 4 Table 2 Test sequence 5 Table 3 An example of the list of test results 6 Table 4 Test conditions for vibration test 7 Table 5 Test conditions for vibration test (mechanical resonant frequency)

23、 7 Table 6 Test conditions for impact test 8 Table 7 Test conditions for waterproof test 10 Table 8 Test conditions 11 Table 9 Test conditions for sulphur dioxide (SO 2 )test 11 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by

24、 endorsement (dop) 1996-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1996-12-01 IEC 68-2-6 NOTEHarmonized, together with its amendments 1:1983 and2:1985, as HD 323.2.6 S1:1988 (not modified). IEC 68-2-27 NOTEHarmonized as EN 60068-2-27:1993 (no

25、t modified). IEC 597-3 NOTEHarmonized as HD 95.3 S1:1984 (not modified). IEC 1079-1 NOTEHarmonized as EN 61079-1:1993 (not modified).EN61114-2:1996 BSI 03-1999 3 1 Scope This part of IEC1114 applies to receiving antennas for satellite broadcast transmissions in the11/12GHz band. The frequency ranges

26、 of the band are those defined by WARCBS-77 and RARCSAT-83. The object of this part is to define the conditions and methods of measurement to be applied. This part does not specify performance requirements. The receiving antenna, together with an SHF converter, constitutes an outdoor unit of a satel

27、lite receiver. Methods of measurement on the SHF converter are described in IEC1079-1. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC1114. At the time of publication, the editions indicated

28、were valid. All normative documents are subject to revision, and parties to agreement based on this part of IEC 1114 are encouraged to investigate the possibility of applying the most recent editions of the normative documents listed below. Members of ISO and IEC maintain registers of currently vali

29、d International Standards. IEV 50(712):1992, International Electrotechnical Vocabulary (IEV) Chapter 712: Antennas. IEC 68-1:1988, Environmental testing Part1:General and guidance. IEC 68-2-11:1981, Environmental testing Part 2: Tests Test Ka: Salt mist. IEC 68-2-14:1984, Environmental testing Part

30、2: Tests Test N: Change of temperature. IEC 68-2-52:1984, Environmental testing Part 2: Tests Test Kb: Salt mist, cyclic (sodium chloride solution). IEC 1114-1:1992, Methods of measurement on receiving antennas for satellite broadcast transmissions in the 12 GHz band Part 1: Electrical measurements

31、on DBS receiving antennas. 3 General explanation of terms For the purpose of this part of IEC1114, the following general definitions of terms apply. 3.1 receiving antenna: An SHF antenna intended for use in individual and collective reception of satellite broadcast signals. This standard mainly appl

32、ies to paraboloidal reflector antennas, which include offset paraboloidal reflector antennas, Cassegrain reflector antennas and other equivalent types. However, it may also apply to planar array antennas. A paraboloidal reflector antenna usually comprises a main reflector, a primary (and sometimes a

33、 secondary) radiator, a circular polarizer, an SHF converter, supporting structures for a primary radiator or subreflector, pointing structures and an antenna fixture to a supporting mast. The supporting mast, however, is not included in this standard. A radome is also excluded. 3.2 mechanical chara

34、cteristics: The characteristics selected concern the ability of the antenna under test to withstand mechanical forces (wind load, vibration etc.) with acceptable degradation of the electrical performance. 3.3 environmental characteristics: These characteristics concern the durability of the antenna

35、under test when exposed to various adverse climatic conditions over a long period. 3.4 wind velocity: The wind velocity is defined as the maximum instantaneous wind velocity. 3.5 operating wind velocity: The specified velocity at which the electrical characteristics of the antenna under test shall n

36、ot degrade by more than specified values, without readjustment of the antenna direction. A typical value for the antenna gain reduction is 1dB. 3.6 survival wind velocity: The specified velocity at which no permanent degradation of the antenna under test may occur, but re-adjustment of the antenna i

37、s required to restore the electrical performance characteristics of the antenna. 3.7 destructive wind velocity: The specified velocity at which permanent degradation of the electrical characteristics of the antenna under test may occur. But, for safety reasons, no part of the antenna shall mechanica

38、lly disintegrate at this specified wind velocity.EN 61114-2:1996 4 BSI 03-1999 3.8 illustrative definitions and typical values of the three kinds of wind velocities: An illustration of the definitions of the three wind velocity values is shown below: The three values of wind velocities shall be as s

39、pecified in the standard of the country for which the antenna is designed. Typical wind velocities are as follows: 3.9 maximum wind exposure area: Themaximum wind exposure area for a device under test is the maximum projected area for the device. It may not coincide with the projected area in the di

40、rection of the applied force, but it represents the worst case. 4 General notes on measurements 4.1 General conditions 4.1.1 Introduction Measurements shall be carried out in accordance with the following conditions, to ensure repeatable results. 4.1.2 Environmental conditions Unless otherwise speci

41、fied, the general ranges of ambient atmospheric conditions for measurement are those shown inTable 1. Table 1 Environmental conditions 4.1.3 Number of test samples One antenna should be prepared for each test item. If an antenna has to be tested for more than two test items, the test order shall fol

42、low the procedure given in IEC68-1. 4.1.4 Accuracy of measuring instruments Under consideration. 4.1.5 Stabilization period Measurements should be started after the characteristics have had time to stabilize. 4.2 Measuring instruments 4.2.1 Vibration generator The vibration generator shall be able t

43、o generate sinusoidal vibrations over a range of frequencies from at least5Hz to55Hz and have amplitudes that can be adjusted easily. 4.2.2 Test chamber for thermal test The thermal test chamber shall have sufficient capacity to contain the antenna under test and be able to maintain the chosen test

44、temperature at any portion of the antenna under test within 2C. The test chamber shall comply with the requirements given in IEC68-2-14. 4.2.3 Water tank for waterproof test The water tank shall have sufficient capacity to permit the complete immersion of a primary radiator and an SHF converter. Any

45、 air leaks from devices under test in the water tank shall be readily observable. operating wind velocity 20 m/s survival wind velocity 40 m/s destructive wind velocity 60 m/s Temperature range 20C 15C Relative humidity 55% 30% Air pressure 86kPa to 106kPaEN61114-2:1996 BSI 03-1999 5 4.2.4 Test inst

46、ruments for salt mist test The following instruments are necessary for the test: a) test chamber; b) salt solution tank; c) atomizer; d) thermal controller; e) humidifier. The test chamber shall comply with the requirements given in IEC68-2-11. The test chamber shall have a capacity that can contain

47、 the antenna under test or substitutional specimens for the antenna components. The salt mist shall flow horizontally. The atomizer, air supply and salt solution shall comply with the requirements given in IEC68-2-11. 5 Methods of measurement 5.1 Wind load at operating wind velocity 5.1.1 Method of

48、measurement a) The antenna under test is installed on a rigid antenna test fixture, as shown inFigure 1. The centre part of the reflector is directly supported by the fixture and the periphery of the reflector is connected to the fixture by means of springs at four points, that is at the upper edge,

49、 the lower edge, the right side edge and the left side edge. There shall be an apparatus to apply forces to a primary radiator in vertical and horizontal directions. b) The antenna under test with its fixture is set up in a test site according to clause4 of IEC1114-1, for the measurement of the antenna gain. c) Measure the antenna gain or the figure of merit (G/T) with no wind load. d) Apply forces W 1and W 2to the reflector and the primary radiator according to the procedure s