1、CENE L E C EN *b 3 O7 4-E = 3404583 0359053 535 BRITISH STANDARD Methods of measurement on receivers for satellite broadcast transmissions in the 35 EN 12 GHz band Part 1. Radio-frequency measurements on outdoor units The European Standard EN 61079-1 : 1993 has the status of a British Standard UDC 6
2、21.396.722 : 629.783 : 620.1 : 621.317.3.083 i1079-1 : 1995 EC 1079-1 : 1992 - CENELEC EN*bL077-1 m 340g583 0359054 423 m Amd. No. BS EN 61079-1 : 1995 Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Tkchnical Committee EP
3、L/12, Radio communication, upon which the foliowing bodies were represented : British Broadcasting Corporation British Educational Equipment Association British Radio and Electronic Equipment Manufacturers Association British klecommunications plc Consumers Association Institution of Electrical Engi
4、neers International Consumer Electronics Association Radio, Electrical and Television Retailers Association Radiocommunications Agency This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and co
5、mes into effect on 15 August 1995 O BSI 1995 Amendments issued since publication The following BSI references relate to the work on this standard: Committee reference EPL/12 Special announcement in BSI Naos April 1995 ISBN O 680 24392 3 CENELEC EN*bL079-1 3404583 0359055 368 m BS EN 61079-1 : 1995 C
6、ontents page Committees responsible Inside front cover National foreword 11 Foreword 2 Text of EN 61079-1 3 , i BS EN 61079-1 : 1995 National foreword This Part of BS EN 61079 has been prepared by Bchnical Committee EPL/l2 and is the English language version of EN 61079-1 : 1993 Methods of measureme
7、nt on receivers for satellite broadcast transmissions in the 12 GHx band Part 1: Electrical measurements on outdoor units published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 1079- 1 : 1992, published by the International Electrotechnical Commi
8、ssion (IEC) . BS EN 61079 is a multipart standard. The other Parts published to date are: Part 2 : 1995 Part 3 : 1995 part 5 : 1995 Electrical measurements on DBS tuner units Electrical measure of overall pormance of receiver systems compl-ising an outdoor unit and a DBS tuner unit Electrical mewrw
9、on decoder units for MAC/piacket Systems. This Part of BS EN 61079 defines the conditions and methods of measurement to be applied to the outdoor unit of a receiver for the direct reception of satellite broadcast transmissions in the 12 GHz band. The channels are those defined by WARC BS-77 and RARC
10、 SAT-83 and the systems are those defined in CCIR Recommendation 650. Performance requirements are not specified. Cross-references Publications referred to IEC 107-1 : 1977 Corresponding British Stmrdard BS 3549 Methods of measuring and expressing the porrnan.ce of television receivers Part 1 : 1979
11、 General considerations and electrical memrmts other than those at audw-freq.uencies BS EN 61079-2 Methods of measur- on receivers for satellite broadcast transm.isS.ions in the 12 GHx band Part 2 : 1995 Electrical measurements on DBS tuner units EN 61079-2 : 1993 (IEC 1079-2 : 1992) Compliance with
12、 a British Standard does not of itself confer immunity from legal obligations. ii CEVEE FC EN*bbR79-l1 3404583 0359057 I130 EUROPEAN STANDARD EN 61079-1 NORME EUROPENNE EUROPISCHE NORM December 1993 UDC 621.396.722 : 629.783 : 620.1 : 621.317.3.083 Descriptors: Radiocommunications, satellite broadca
13、sting, receivers, measurements, testing conditions, radio frequencies English version Methods of measurement on receivers for satellite broadcast transmissions in the 12 GHz band Part 1 : Radio-frequency measurements on outdoor units (IEC 1079-1 : 1992) Mthods de mesure sur les rcepteurs dmissions d
14、e radiodiffusion par satellite dans la bande 12 GHz Partie 1: Mesures en radiofrquence sur le matriel extrieur AuBeneinheit MeBverfahren fr Empfnger fr Satellitenrundfunk-Ubertragungen im 12- GHz-Bereich Teil 1 : Radiofrequenz-Messungen an der (CE1 1079-1 : 1993) (IEC 1079-1 : 1992) This European St
15、andard was approved by CENELEC on 1993-09-22. 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 concer
16、ning 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 translation under the responsibility of a CENELEC member into i
17、ts 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, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain
18、, 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- 1050 Brussels O 1993 Copyright reserved to CENELEC me
19、mbers Ref. No. EN 61079-1 : 1993 E CENELEC ENMb3079-1 H 3404583 0359058 077 W Page 2 EN 61079-1 : 1993 Foreword At the request of the 73rd CENELEC Bchnical Board, the International Standard IEC 1079-1 : 1992 was submitted to the CENELEC Unique Acceptance Procedure (UAP) in November 1992 for acceptan
20、ce as a European Standard. The text of the International Standard was approved by CENELEC as EN 61079-1 on 22 September 1993. The following dates were fixed: - latest date of publication of an identical national standard (dop) 1994-09-01 - latest date of withdrawal of conflicting national standards
21、(dw) 1994-09-01 Annexes designated normative are part of the body of the standard. Annexes designated informative are given only for information. In this standard, annex A is informative, and annex ZA is normative. CENELEC EN*bL079-1 W 3404583 0359059 TO3 Page 3 EN 61079-1 : 1993 CONTENTS Page SECTI
22、ON 1 . GENERAL Clause 1 . 1 Scope 6 1.2 Normative references 6 1.3 Definitions 7 SECTION 2 . GENERAL NOTES ON MEASUREMENT 2.1 General conditions 2.1 . 1 Introduction . 2.1.2 Test site . 2.1.3 Environmental conditions . 2.1.4 Power supply 2.1.5 Other conditions 2.2 Radio-frequency input signals . 2.2
23、.1 2.2.2 2.2.3 2.2.4 2.2.5 Introduction . Test signals . Test frequencies Radio-f requency input arrangement . Input signal level SECTION 3 . MEASURING METHODS 7 7 7 7 7 8 8 8 8 8 8 9 3.1 Polarization isolation . 10 3.1.1 Introduction . 1 0 3.1.2 Method of measurement 1 0 3.1 . 3 Presentation of the
24、 results . I I CENELEC EN*bL079-L m 3404583 OL590b0 725 m Page 4 EN 61079-1 : 1993 clause 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Impedance matching at the input terminal 3.2.1 Introduction . 3.2.2 Method of measurement . 3.2.3 Presentation of the results . Impedance matching at the output terminal 3.3.1 Introd
25、uction . 3.3.2 Method of measurement . 3.3.3 Presentation of the results . Gain frequency characteristics 3.4.1 Introduction . 3.4.2 Method of measurement . 3.4.3 Presentation of the results . output signal level versus input signal level . 3.5.1 Introduction . 3.5.2 Method of measurement . 3.5.3 Pr
26、esentation of the results . Intermodulation 3.6.1 Introduction . 3.6.2 Method of measurement . 3.6.3 Presentation of the results . Noise figure and noise temperature . 3.7.1 Introduction . 3.7.2 Method of measurement . 3.7.3 Presentation of the results . G/T . 3.8.1 Introduction . 3.8.2 Method of me
27、asurement . 3.8.3 Presentation of the results . pap Il 11 11 12 12 12 12 13 13 13 13 14 14 14 14 15 15 15 15 16 16 16 16 18 18 18 18 19 . CEHELEC EN*b1077-3 3404583 0359063 bb3 Page 5 EN 61079-1 : 1993 3.9 Alternative method for GJT 19 . 3.9.1 Introduction . 19 3.9.2 Method of measurement . 20 3.9.3
28、 Presentation of the results . 22 3.10 Image suppression ratio . 22 3.10.1 Introduction . 22 3.1 0.2 Method of measurement . 22 3.1 0.3 Presentation of the results . 23 23 23 3.1 1 Spurious responses 3.1 1.1 Introduction 3.1 1.2 Method of measurement 23 3.1 1.3 Presentation of the results . 24 3.12
29、Intermediate frequency beat suppression ratio . 25 3.12.1 Introduction . 25 3.1 2.2 Method of measurement . 25 3.12.3 Presentation of the results . 25 26 3.1 3 Local oscillator frequency stability 3.13.1 Introduction . 26 3.13.2 Method of measurement . 26 3.13.3 Presentation of the results . 26 27 F
30、IGURES ANNEX A (informative) . Bibliography . 43 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications 44 CENELEC EN*bL079-L m 3i.104583 0359062 5T m Page 6 EN 61079-1 : 1993 METHODS OF MEASUREMENT ON RECEIVERS FOR SAT
31、ELLITE BROADCAST TRANSMISSIONS IN THE 12 GHz BAND Part 1 : Radio-frequency measurements on outdoor units SECTION 1 - GENERAL 1.1 Scope This International Standard applies to the outdoor unit of a receiver for the direct reception of satellite broadcast transmissions in the 12 GHz band. The channels
32、are those defined by WARC BS-77 and RARC SAT-83 and the systems are those defined in CCIR Recommendation 650. The object of this standard is to define the conditions and methods of measurement to be applied. The standard does not specify performance requirements. An outdoor unit normally comprises t
33、hree main parts, the antenna, the depolarizer and optional orthomode transducer (OMT), and the SHF converter as defined in clause 1.3. The methods of measuring the electrical properties described in this part of the standard apply particularly to the outdoor unit or the SHF converter. Methods of mea
34、surement on the associated DBS tuner unit are described in Part 2 of this standard. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication of this standard,
35、the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain regi
36、sters of currently valid International Standards. IEC 107-1 : 1977, Recommended methods of measurement on receivers for television broadcast transmissions - Part 1 : General considerations - Electrical measurements other than those at audio-frequencies. IEC 1079-2: 1992. Methods of measurement on re
37、ceivers for satellite broadcast trans- missions in the 12 GHz band - Part 2: Electrical measurements on DBS tuner units. CENELEC EN*bL077-L 3409583 0359063 434 Page 7 EN 61079-1 : 1993 1.3 Definitions For the purpose of this International Standard, the following definitions apply. The outdoor unit i
38、s a part of the receiver for satellite broadcast transmissions in the 12 GHz band, and comprises three main parts: a) the antenna including the feed horn which receives the signals broadcast by satellites; b) the depolarizer that converts circular polarization to linear polarization and an op- tiona
39、l orthomode transducer, OMT. which separates two incoming differently polarized signals into two independent SHF outputs; c) the SHF converter (also called low noise converter (LNC) or low noise block converter (LNB), which is a device to convert the received signals in the 12 GHz band to intermedia
40、te frequencies (often called the first .f.) usually in the range of approximately 1 GHz to 2 GHz, for application to one or more DBS tuner units, where demodulation and decoding of the received signals are performed. SECTION 2 - GENERAL NOTES ON MEASUREMENT 2.1 General conditions 2.1 .I Introduction
41、 Measurements shall be made in accordance with the following conditions to ensure reproducible results. The methods described here assume the use of the following trans- mission systems: digital sub-CarrierlNTSC, B-MAC, C-MAC/packet, D-MAC/packet and D2 MAC/packet. Information pertaining to these sy
42、stems may be found in the references listed in the bibliography given in annex A. 2.1.2 Test site Measurements shall be carried out at a location that is not subject to external interference from radio frequency energy. If interference cannot be avoided, the measurements shall be carried out in a sc
43、reened room. 2.1.3 Environmental conditions Sections Three, Four and Five of IEC 107-1 shall be applied. 2.1 -4 Power supply 2.1.4.1 Bias network When measuring the characteristics of an outdoor unit, it is necessary to supply d.c. or a.c. power to it without influencing the output signal. For this
44、purpose, a bias network such as that shown in figure 1 can be used. NOTE - Reverse connection of the bias network (see figure 2) is likely to cause damage. CENELEC EN*bL079-1 3404583 01590b4 370 W Page 8 EN 61079-1 : 1993 2.1.4.2 Nominal voltage The d.c. or a.c. voltage to be applied to the unit dur
45、ing the test shall be within f2 % of the nominal operating voltage, unless otherwise specified. Where only a range of voltages is specified, the nominal voltage shall be taken as the mean value of this range. Measurements shall be repeated at the limits of the specified range, as indicated in the fo
46、llowing clauses. 2.1.5 Other conditions 2.1.5.1 Accuracy of the measuring instruments The accuracy of the measuring instruments used, if known, shall either be stated as a percentage or in decibels as appropriate. Alternatively, the accuracy class may be quoted as laid down in the relevant publicati
47、ons (under consideration). 2.1.5.2 Stabilization period The characteristics of an outdoor unit may change for some period after the application of supply voltage. Unless otherwise specified, measurements should be started after the stabilization of the characteristics is obtained. 2.2 Radio-frequenc
48、y input signals 2.2.1 Introduction The following input signals shall be used. 2.2.2 Test signals Unless otherwise specified, continuous wave (c.w.) radio-frequency (r.f.) signals shall be used. 2.2.3 Test frequencies Unless otherwise specified, test frequencies shall be selected near the nominal car
49、rier frequency of each broadcast channel, as specified by the standards of the country or countries in which the equipment is intended for use. 2.2.4 Radio-frequency input arrangement Depending on the input facilities of the equipment under test, the radio-frequency input signal can be applied in three different ways: a) by means of a waveguide, having a flange and a cross-section compatible with the input of the unit; b) by means of a coaxial cable and a connector compatible with the input of the unit; c) by means of a transmitting antenna generating a field
