1、BRITISH STANDARD BS EN 60835-3-12: 1997 BS 7573-3.12: 1993 IEC 835-3-12: 1993 Incorporates Amendment No. 1 to BS 7573-3.12:1993 (renumbers BS as BSEN 60835-3-12:1997) Methods of measurement for equipment used in digital microwave radio transmission systems Part 3: Measurements on satellite earth sta
2、tions Section 3.12 Overall system performance The European Standard EN 60835-3-12:1995 has the status of a British Standard ICS 33.060.30BSEN60835-3-12:1997 This British Standard, having been prepared under the directionof the Electronic Equipment Standards Policy Committee, was published underthe a
3、uthority of the Standards Board and comes into effect on 15 July 1993 BSI 03-2000 The following BSI references relate to the work on this standard: Committee reference EEL/25 Draft for comment 91/30989 DC ISBN 0 580 21874 0 Committees responsible for this British Standard The preparation of this Bri
4、tish Standard was entrusted 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
5、 Independent Television Commission Institution of Electrical Engineers Radio, Electrical and Television Retailers Association Radiocommunications Agency The following body was also represented in the drafting of the standard, through subcommittees and panels: ERA Technology Ltd. Amendments issued si
6、nce publication Amd. No. Date Comments 9597 September 1997 Indicated by a sideline in the marginBSEN60835-3-12:1997 BSI 03-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 60835-3-12 3BSEN60835-3-12:1997 ii BSI 03-2000 National foreword This S
7、ection of BS EN 60835 has been prepared by Technical Committee EPL/102 (formerly EEL/25), and is the English language version of EN 60835-3-12:1995, Methods of measurement for equipment used in digital microwave radio transmission systems Part 3: Measurements on satellite earth stations Section 12:
8、Overall system performance, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 835-3-12:1993, published by the International Electrotechnical Committee(IEC). Cross-references Attention is drawn to the fact that Annex ZA lists normative refere
9、nces to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “F
10、ind” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary 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 leg
11、al obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 4 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table
12、on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60835-3-12 January 1995 ICS 33.060.30 Descriptors: Telecommunications, radiocommunications, communication equipment, earth stations, microwave frequencies, digital technics, measurements, characteristics English version M
13、ethods of measurement for equipment used in digital microwave radio transmission systems Part 3: Measurements on satellite earth stations Section 12: Overall system performance (IEC 835-3-12:1993) Mthodes de mesure applicables au matriel utilis pour les systmes de transmission numrique en hyperfrque
14、nce Partie 3: Mesures applicables aux stations terriennes de tlcommunications par satellite Section 12: Performance globale du systme (CEI 835-3-12:1993) Meverfahren fr Gerte in digitalen Mikrowellen-Funkbertragungssystemen Teil 3: Messungen an Satelliten-Erdfunkstellen Hauptabschnitt 12: Leistung d
15、es Gesamtsystems (IEC 835-3-12:1993) This European Standard was approved by CENELEC on 1994-12-06. 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.
16、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 translati
17、on 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, Ireland, I
18、taly, 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 Stassart 35, B-
19、1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN 60835-3-12:1995 EEN60835-3-12:1995 BSI 03-2000 2 Foreword The text of the International Standard IEC 835-3-12:1993, prepared by SC 12E, Radio-relay and fixed satellite communications systems, of IEC TC 12, Radiocommunications, was
20、submitted to the formal vote and was approved by CENELEC as EN 60835-3-12 on 1994-12-06 without any modification. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. Content
21、Page Foreword 2 1 Scope 3 2 Normative references 3 3 Overall system performance 3 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications 4 latest date by which the EN has to be implemented at national level by publicati
22、on of an identical national standard or by endorsement (dop) 1995-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1995-12-01EN60835-3-12:1995 BSI 03-2000 3 1 Scope This section of IEC 835-3 describes methods of measurement on overall system perfor
23、mances on satellite earth stations. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC 835-3. At the time of publication, the editions indicated were valid. All normative documents are subjec
24、t to revision, and parties to agreements based on this section, of IEC 835-3 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 835-3-
25、9:1993, Methods of measurement for equipment used in digital microwave radio transmission systems Measurements on satellite earth stations Section 9: Terminal equipment SCPC-PSK. IEC 835-3-10:1993, Methods of measurement for equipment used in digital microwave radio transmission systems Part 3: Meas
26、urements on satellite earth stations Section 10: Terminal equipment TDMA. 3 Overall system performance In the case of satellite communications equipment, the overall system performance is defined as the performance of the system including: the terminal equipment such as SCPC (single-channel-per carr
27、ier) or TDMA (Time division multiple access) common equipment and channel units; the station RF/IF equipment such as LNA (low noise amplifier), HPA (high power amplifier), and up-down-converters; the antenna; the satellite transponder. Therefore, the measurement of actual overall system performance
28、should be performed only on site, since it is practically impossible to carry out in the factory, even if the antenna and the satellite transponder can be simulated. As for simulated tests for overall system performance, such as tests of BER (Bit error ratio) versus C/N under conditions of adjacent
29、channel interference, these methods of measurement are treated in the sections concerning terminal equipment, i.e. IEC 835-3-9, and IEC 835-3-10.EN60835-3-12:1995 4 BSI 03-2000 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European
30、publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
31、 of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. NOTEWhen the international publication has been modified by CENELEC common modifications, indicated by (rood
32、), the relevant EN/HD applies. IEC publication Date Title EN/HD Date 835-3-9 1993 Methods of measurement for equipment used in digital microwave radio transmission systems Part 3: Measurements on satellite earth stations Section 9: Terminal equipment SCPC-PSK EN 60835-3-9 1995 835-3-10 1993 Section
33、10: Terminal equipment TDMA traffic earth station EN 60835-3-10 1994blankBS EN 60835-3-12: 1997 BS 7573-3.12: 1993 IEC 835-3-12: 1993 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents t
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