1、BRITISH STANDARD BS EN 60835-1-1:1994 BS 7573-1.1: 1992 IEC 835-1-1: 1990 Incorporating Amendment No. 1 Methods of measurement for equipment used in digital microwave radio transmission systems Part 1: Measurements common to terrestrial radio-relay systems and satellite earth stations Section 1.1 Ge
2、neral The European Standard EN60835-1-1:1992 has the status of a British Standard UDC 621.396.6:629.783:621.317.08BSEN60835-1-1:1994 This British Standard, having been prepared under the directionof the Electronic Equipment Standards Policy Committee, was published underthe authority of the Standard
3、s Board and comes intoeffect on 1April1992 BSI 03-2000 The following BSI references relate to the work on this standard: Committee reference EEL/25 Draft for comment 89/28590 DC ISBN 0 580 20756 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted
4、 by the Electronic Equipment Standards Policy Committee (EEL/-) to Technical Committee EEL/25, upon which the following bodies were represented: British Broadcasting Corporation British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc Independent Television Com
5、mission Institution of Electrical Engineers Radio, Electrical and Television Retailers Association Radiocommunications Agency The following bodies were also represented in the drafting of the standard, through subcommittees and panels: EEA (the Association of the Electronics, Telecommunications and
6、Business Equipment Industries) ERA Technology Ltd. GAMBICA (BEAMA Ltd.) Amendments issued since publication Amd. No. Date Comments 8338 December 1994 Indicated by a sideline in the marginBSEN60835-1-1:1994 BSI 03-2000 i Contents Page Committees responsible Inside front cover National foreword ii For
7、eword 2 1 Scope 3 2 Normative references 3 3 Terms and definitions 3 4 Conditions of measurement 4 5 Standard test conditions 5 6 Supplementary conditions for the power supply 6 7 Measurements under conditions deviating from standard test conditions 7 Appendix A Bibliography 12 Annex ZA (normative)
8、Other international publications quoted in this standard with the references of the relevant European publications 13 Figure 1 Block diagram of a typical terminal station of a digital terrestrial radio-relay system 9 Figure 2 Block diagram of a typical digital satellite earth station 10 Figure 3 Vol
9、tage waveform of the a.c. power supply 11 Figure 4 Unbalance of a three-phase system 11 Publication(s) referred to Inside back coverBSEN60835-1-1:1994 ii BSI 03-2000 National foreword This Section of BS7573 has been prepared under the direction of the Electronic Equipment Standards Policy Committee.
10、 It is identical with IEC835-1-1 “Methods of measurement for equipment used in digital microwave radio transmission systems Part1: Measurements common to terrestrial radio-relay systems and satellite earth stations Section1 General”, published by the International Electrotechnical Commission (IEC).
11、In 1992 the European Committee for Electrotechnical Standardization (CENELEC) accepted IEC835-1-1:1990 as European Standard EN60835-1-1:1992. As a consequence of implementing the European Standard this British Standard is renumbered as BSEN60835-1-1 and any reference to BS7573-1.1 should be read as
12、a reference to BSEN60835-1-1. BS 7573 is published in three Parts. The other Parts are: Part 2: Measurements on terrestrial radio-relay systems; Part 3: Measurements on satellite earth stations. The Technical Committee has reviewed the provisions of IEC84:1957, IEC119:1960, IEC215:1987 and CISPR16:1
13、987, to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A related standard to IEC215:1987 is BS3192:1990 and a related standard to CISPR16:1987 is BS727:1983. A British Standard does not purport to include all the necessary pro
14、visions 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. Cross-references International Standard Corresponding British Standard BS 2011 Environment testing IEC 68-1:1
15、988 Part 1.1:1989 General and guidance (Identical) IEC 68-2-1:1974 Part 2.1A:1990 Tests A. Cold (Identical IEC 68-2-2:1974 Part 2.1B:1977 Tests B. Dry heat (Identical) IEC 68-2-3:1969 Part 2.1Ca:1977 Test Ca. Damp heat, steady state (Identical) IEC 68-2-30:1980 Part 2.1Db:1981 Test Db and guidance:
16、Damp heat, cyclic (12 + 12hour cycle) (Identical) IEC 76:1967 BS 171 Power transformers (Most Parts Technically equivalent) Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to14, an inside back cover and a back cover. This standard
17、 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.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60835-1-1 November 1992 UDC 621.396.6:629.783:621.317.08 Descriptors: Radiocommunications, tel
18、ecommunications, communication equipment, earth stations, satellite broadcasting, radio-relay systems, tests, measurements, characteristics, general English version Methods of measurement for equipment used in digital microwave radio transmission systems Part 1: Measurements common to terrestrial ra
19、dio-relay systems and satellite earth stations Section one: General (IEC 835-1-1:1990) Mthodes de mesure applicables au matriel utilis pour les systmes de transmission numrique en hyperfrquence Premire partie: Mesures communes aux faisceaux hertziens terrestres et aux stations terriennes de tlcommun
20、ications par satellite Section un: Gnralits (CEI835-1-1:1990) Meverfahren fr Gerte in digitalen Mikrowellen-Funkbertragungssystemen Teil1: Messungen an terrestrischen Richtfunksystemen und Satelliten-Erdfunkstellen Hauptabschnitt eins: Allgemeines (IEC835-1-1:1990) This European Standard was approve
21、d by CENELEC on1992-09-15. 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 concerning such national
22、 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 an
23、d 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, Switzerl
24、and 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 1992 Copyright reserved to CENELEC members Ref. No. EN 608
25、35-1-1:1992 EEN60835-1-1:1992 BSI 03-2000 2 Foreword The CENELEC questionnaire procedure, performed for finding out whether or not the International Standard IEC835-1-1:1990 could be accepted without textual changes, has shown that no common modifications were necessary for the acceptance as a Europ
26、ean Standard. The reference document was submitted to the CENELEC members for formal vote and was approved by CENELEC as EN 60835-1-1 on15September1992. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. lates
27、t date of publication of an identical national standard (dop) 1993-09-01 latest date of withdrawal of conflicting national standards (dow)1993-09-01EN60835-1-1:1992 BSI 03-2000 3 1 Scope The conditions of measurement and the methods of measuring the characteristics given in this part of the standard
28、 are common to terrestrial radio-relay and satellite earth station systems using digital modulation. These test methods are general and are applicable to systems of all capacities and the tests to be made should be agreed between the parties concerned. The object of this standard is to describe the
29、conditions and methods of measurement to be used to ascertain the performance of digital microwave radio transmission systems and of the equipment used in such systems, and to facilitate the comparison of the results of measurements made by different observers. It contains details of selected method
30、s of making measurements recommended for assessing the essential properties of a digital microwave radio transmission system and of the equipment used in such systems. These methods are neither mandatory nor limiting; a choice of measurements can be made in each particular case. If necessary, additi
31、onal measurements may be made but these should preferably be carried out in accordance with the standards laid down by other IEC Technical Committees or Sub-Committees or by other international bodies. Limiting values of the various quantities for acceptable performance are not specified since these
32、 should be given in the detailed equipment specification. The methods of measurement described in this standard are intended for “type” and “acceptance” tests under simulated conditions and they may also be used for factory tests. 2 Normative references The following IEC publications are quoted in t
33、his standard: Publications Nos. 68: Environmental testing. and the following CISPR publication: 3 Terms and definitions The methods of measurement described in this part and in the other parts of this standard are preceded by the definition of the quantity to be measured, either in the relevant clau
34、se or in a separate clause in order to show the coherence between the various definitions. As far as practicable, the definitions are in conformity with those given in the IEC International Electrotechnical Vocabulary (IEV) or with those used by other Technical Committees of the IEC or other interna
35、tional bodies. Where deviations exist, they appeared necessary for a better understanding of this standard. 3.1 detailed equipment specification any document especially drawn up or provided, which describes the properties and the performance of an equipment under specified conditions of normal use,
36、together with specified fault conditions which may arise NOTEFor the general principles and the test methods to be followed to assess that the equipment conforms to the appropriate safety regulations under conditions of normal use and under specified conditions, reference should be made to IEC215. 6
37、8-1 (1988): Part 1: General and guidance. 68-2-1 (1974): Part 2: Tests Tests A: Cold. 68-2-2 (1974): Tests B: Dry heat. 68-2-3 (1969): Test Ca: Damp heat, steady state. 68-2-30 (1980): Test Db and guidance: Damp heat, cyclic (12 + 12-hour cycle). 76 (1967): Power transformers. 84 (1957): Recommendat
38、ions for mercury-arc convertors. 119 (1960): Recommendations for polycrystalline semiconductor rectifier stacks and equipment. 215 (1987): Safety requirements for radio transmitting equipment. 16 (1987): CISPR specification for radio interference measuring apparatus and measurement method.EN60835-1-
39、1:1992 4 BSI 03-2000 3.2 digital microwave radio transmission system for the purpose of this standard the elements comprising a digital microwave radio transmission system are those shown inFigure 1 andFigure 2 for terrestrial radio-relay systems and satellite earth stations system configurations di
40、ffer, so, for simplicity, certain elements, e.g.service channel arrangements and adaptive equalizers, which may be present are not shown in the figures 3.3 type a type comprises products having similar design features employing similar manufacturing techniques and which fall within the manufacturers
41、 usual range of characteristics NOTE 1Mounting accessories can be ignored, provided that they have no significant effect on the test results. NOTE 2“Characteristics” cover the combinations of: a) electrical ratings; b) sizes; c) behaviour under environmental stress. NOTE 3The list of characteristics
42、 and their limits should be agreed upon between purchaser and manufacturer. 3.4 type test the complete series of tests to be carried out on a number of identical specimens representative of the type, and which contribute to determining that a particular manufacturer can be considered capable of prod
43、ucing equipment meeting the specification 3.5 type approval the decision by the proper authority, e.g.government agency, the purchaser or his nominee, that a particular manufacturer can be considered capable of meeting the specification 3.6 acceptance tests tests carried out to determine the accepta
44、bility of a consignment on the basis of an agreement between purchaser and manufacturer the agreement shall cover: a) the size of the sample; b) the selection of tests; c) tolerances and exceptions. 3.7 factory tests tests carried out by the manufacturer to ascertain if the equipment which he produc
45、es meets the specification 3.8 glossary of terms please see References 1 and 2 1) 4 Conditions of measurement Care shall be taken to avoid all conditions which may lead to the equipment being damaged. Unless otherwise specified, the measurement shall be carried out under standard conditions with res
46、pect of power supply, temperature, air pressure, humidity and terminal load, as given below. After the equipment has been finally set up for these conditions, the settings shall be kept constant during all measurements, with the exception of those settings which need to be varied before or during a
47、specified measurement period. 1) The figures in square brackets refer to “Bibliography”, Appendix A, page12.EN60835-1-1:1992 BSI 03-2000 5 5 Standard test conditions 5.1 Standard conditions for the power supply Measurements under standard power supply conditions are carried out at the nominal voltag
48、e and the nominal frequency stated in the detailed equipment specification. The voltage shall be measured at the power supply terminals of the equipment under test. During tests carried out on a sub-system or on a simulated system, the voltage and the frequency of the power supply shall not deviate
49、from the nominal values by more than 2 % unless otherwise specified. Unless otherwise specified, standard supply conditions include the supplementary conditions given inclause6. 5.2 Standard atmospheric conditions Measurements under standard atmospheric conditions are normally carried out in accordance with5.2.1 below. If necessary, the results of the measurements should be corrected by calculation to the standard reference temperature of20 C and to the standard reference air pressure of1.013 10 5Pa (1013mbar) as explain
