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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 BS EN 60835-3-12:1997) Methods of measurement for equipment used in digital microwave radio transmission systems Part 3: Measurements on satellite earth st
2、ations Section 3.12 Overall system performance The European Standard EN 60835-3-12:1995 has the status of a British Standard ICS 33.060.30 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60835-3-12:1997 This British Standard, having be
3、en prepared under the direction of the Electronic Equipment Standards Policy Committee, was published under the authority 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 co
4、mment 91/30989 DC ISBN 0 580 21874 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Electronic Equipment Standards Policy Committee (EEL/-) to Technical Committee EEL/25, upon which the following bodies were represented: British Broadca
5、sting Corporation British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc Independent Television Commission Institution of Electrical Engineers Radio, Electrical and Television Retailers Association Radiocommunications Agency The following body was also repres
6、ented in the drafting of the standard, through subcommittees and panels: ERA Technology Ltd. Amendments issued since publication Amd. No.DateComments 9597September 1997 Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:26:22 GMT+00:00 2006, Uncontrolled
7、Copy, (c) BSI BS EN 60835-3-12:1997 BSI 03-2000i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 60835-3-123 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60835-3-12:1997 ii BSI 03-2000
8、 National foreword This Section 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 ea
9、rth stations Section 12: 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
10、 ZA lists normative references 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 Corresponden
11、ce 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 of British Standards are responsible for their correct application. Compliance with a British Standard does not of itsel
12、f confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN 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 indica
13、ted in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60835-3-12 January 1995 ICS 33.060.30 Descriptors: Telecommunications, radiocommunicat
14、ions, communication equipment, earth stations, microwave frequencies, digital technics, measurements, characteristics English version Methods of measurement for equipment used in digital microwave radio transmission systems Part 3: Measurements on satellite earth stations Section 12: Overall system
15、performance (IEC 835-3-12:1993) Mthodes de mesure applicables au matriel utilis pour les systmes de transmission numrique en hyperfrquence Partie 3: Mesures applicables aux stations terriennes de tlcommunications par satellite Section 12: Performance globale du systme (CEI 835-3-12:1993) Meverfahren
16、 fr Gerte in digitalen Mikrowellen-Funkbertragungssystemen Teil 3: Messungen an Satelliten-Erdfunkstellen Hauptabschnitt 12: Leistung des 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
17、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 standards may be obtained on application to the Central Secretariat or to any CENELEC member
18、. 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 and notified to the Central Secretariat has the same status as the official versions. CENELEC m
19、embers are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit
20、 Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN 60835-3-12:1995 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:26:22 GMT+00:00 2006
21、, Uncontrolled Copy, (c) BSI EN 60835-3-12:1995 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 submitted to the formal vote and was approved by CENELEC
22、 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 Page Foreword2 1Scope3 2Normative references3 3Overall s
23、ystem performance3 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications4 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 199
24、5-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1995-12-01 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60835-3-12:1995 BSI 03-20003 1 Scope This section of IEC 835-3 describes met
25、hods of measurement on overall system performances 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 we
26、re valid. All normative documents are subject 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 current
27、ly valid International Standards. IEC 835-3-9:1993, 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 micro
28、wave radio transmission systems Part 3: Measurements 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 equ
29、ipment such as SCPC (single-channel-per carrier) 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 measu
30、rement of actual overall system performance 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 rat
31、io) versus C/N under conditions of adjacent 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. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN
32、60835-3-12:1995 4 BSI 03-2000 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are
33、cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edi
34、tion of the publication referred to applies. NOTEWhen the international publication has been modified by CENELEC common modifications, indicated by (rood), the relevant EN/HD applies. IEC publicationDateTitleEN/HDDate 835-3-91993Methods of measurement for equipment used in digital microwave radio tr
35、ansmission systems Part 3: Measurements on satellite earth stations Section 9: Terminal equipment SCPC-PSK EN 60835-3-91995 835-3-101993Section 10: Terminal equipment TDMA traffic earth station EN 60835-3-10 1994 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:26:22 GMT+00:00 2006, Uncontr
36、olled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60835-3-12: 1997 BS 7573-3.12: 1993 IEC 835-3-12: 1993 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national
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