1、BRITISH STANDARD BS EN 61079-1:1995 IEC 1079-1: 1992 Methods of measurement on receivers for satellite broadcast transmissions in the12GHz band Part 1: Radio-frequency measurements on outdoor units The European Standard EN 61079-1:1993 has the status of a British Standard UDC 621.396.722:629.783:620
2、.1:621.317.3.083BSEN 61079-1:1995 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes into effect on BSI 12-1999 The following BSI references relate to the work on this standard: Commit
3、tee reference EPL/12 Special announcement in BSINews April 1995 ISBN 0 580 24392 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee EPL/12, Radio communication, upon which the following bodies were represented: British Bro
4、adcasting Corporation British Educational Equipment Association British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc Consumers Association Institution of Electrical Engineers International Consumer Electronics Association Radio, Electrical and Television Re
5、tailers Association Radiocommunications Agency Amendments issued since publication Amd. No. Date CommentsBSEN 61079-1:1995 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 61079-1 5 List of references Inside back coverBSEN 61079-1:1995
6、ii BSI 12-1999 National foreword This Part of BSEN61079 has been prepared by Technical Committee EPL/12 and is the English language version of EN 61079-1:1993 Methods of measurement on receivers for satellite broadcast transmissions in the12GHz band Part1:Electrical measurements on outdoor units pub
7、lished by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 1079-1:1992, published by the International Electrotechnical Commission (IEC). BS EN 61079 is a multipart standard. The other Parts published to date are: Part 2:1995: Electrical measurements on
8、 DBS tuner units; Part 3:1995: Electrical measurements of overall performance of receiver systems comprising an outdoor unit and a DBS tuner unit; Part 5:1995: Electrical measurements on decoder units for MAC/packet systems. This Part of BSEN61079 defines the conditions and methods of measurement to
9、 be applied to the outdoor unit of a receiver for the direct reception of satellite broadcast transmissions in the12GHz band. The channels are those defined by WARC BS-77 and RARC SAT-83 and the systems are those defined in CCIR Recommendation 650. Performance requirements are not specified. A Briti
10、sh 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 legal obligations. Cross-references Publications referred to Corres
11、ponding British Standard IEC 107-1:1977 BS 3549 Methods of measuring and expressing the performance of television receivers Part 1:1979 General considerations and electrical measurements other than those at audio-frequencies EN 61079-2:1993 (IEC 1079-2:1992) BS EN 61079-2 Methods of measurements on
12、receivers for satellite broadcast transmissions in the12GHz band Part 2:1995 Electrical measurements on DBS tuner units Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theENtitle page, pages 2 to 36, an inside back cover and a back cover. This standard
13、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 61079-1 December 1993 UDC 621.396.722:629.783:620.1:621.317.3.083 Descriptors: Radiocommunicati
14、ons, satellite broadcasting, receivers, measurements, testing conditions, radio frequencies English version Methods of measurement on receivers for satellite broadcast transmissions in the12GHz band Part 1: Radio-frequency measurements on outdoor units (IEC 1079-1:1992) Mthods de mesure sur les rcep
15、teurs dmissions de radiodiffusion par satellite dansla bande 12 GHz Partie 1: Mesures en radiofrquence sur le matriel extrieur (CEI 1079-1:1993) Meverfahren fr Empfnger fr Satellitenrundfunk-Ubertragungen im 12-GHz-Bereich Teil 1: Radiofrequenz-Messungen an der Aueneinheit (IEC 1079-1:1992) This Eur
16、opean Standard was approved by CENELEC on 1993-09-22. 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 referenc
17、es 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 translation under the responsibility of a CENELEC memb
18、er 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, Italy, Luxembourg, Netherlands, Norway, Portug
19、al, Spain, Sweden, Switzerland and UnitedKingdom. 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 1993 Copyright reserved to CENEL
20、EC members Ref. No. EN 61079-1:1993 EEN61079-1:1993 BSI 12-1999 2 Foreword At the request of the 73rd CENELEC Technical Board, the International Standard IEC 1079-1:1992 was submitted to the CENELEC Unique Acceptance Procedure (UAP) in November 1992 for acceptance as a European Standard. The text of
21、 the International Standard was approved by CENELEC as EN61079-1 on22September 1993. The following dates were fixed: 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 Ann
22、ex ZA is normative. latest date of publication ofan identical national standard (dop) 1994-09-01 latest date by of withdrawn of conflicting national standards (dow) 1994-09-01EN61079-1:1993 BSI 12-1999 3 Contents Page Foreword 2 Section 1. General 1.1 Scope 5 1.2 Normative references 5 1.3 Definitio
23、ns 5 Section 2. General notes on measurement 2.1 General conditions 5 2.1.1 Introduction 5 2.1.2 Test site 5 2.1.3 Environmental conditions 6 2.1.4 Power supply 6 2.1.5 Other conditions 6 2.2 Radio-frequency input signals 6 2.2.1 Introduction 6 2.2.2 Test signals 6 2.2.3 Test frequencies 6 2.2.4 Rad
24、io-frequency input arrangement 6 2.2.5 Input signal level 7 Section 3. Measuring methods 3.1 Polarization isolation 7 3.1.1 Introduction 7 3.1.2 Method of measurement 8 3.1.3 Presentation of the results 8 3.2 Impedance matching at the input terminal 8 3.2.1 Introduction 8 3.2.2 Method of measurement
25、 8 3.2.3 Presentation of the results 9 3.3 Impedance matching at the output terminal 9 3.3.1 Introduction 9 3.3.2 Method of measurement 9 3.3.3 Presentation of the results 9 3.4 Gain frequency characteristics 9 3.4.1 Introduction 9 3.4.2 Method of measurement 9 3.4.3 Presentation of the results 10 3
26、.5 Output signal level versus input signal level 10 3.5.1 Introduction 10 3.5.2 Method of measurement 10 3.5.3 Presentation of the results 11 3.6 Intermodulation 11 3.6.1 Introduction 11 Page 3.6.2 Method of measurement 11 3.6.3 Presentation of the results 11 3.7 Noise figure and noise temperature 1
27、1 3.7.1 Introduction 11 3.7.2 Method of measurement 12 3.7.3 Presentation of the results 13 3.8 G/T 13 3.8.1 Introduction 13 3.8.2 Method of measurement 13 3.8.3 Presentation of the results 14 3.9 Alternative method for G/T 14 3.9.1 Introduction 14 3.9.2 Method of measurement 14 3.9.3 Presentation o
28、f the results 16 3.10 Image suppression ratio 16 3.10.1 Introduction 16 3.10.2 Method of measurement 16 3.10.3 Presentation of the results 17 3.11 Spurious responses 17 3.11.1 Introduction 17 3.11.2 Method of measurement 17 3.11.3 Presentation of the results 17 3.12 Intermediate frequency beat suppr
29、ession ratio 18 3.12.1 Introduction 18 3.12.2 Method of measurement 18 3.12.3 Presentation of the results 18 3.13 Local oscillator frequency stability 18 3.13.1 Introduction 18 3.13.2 Method of measurement 18 3.13.3 Presentation of the results 19 Annex A (informative) Bibliography 35 Annex ZA (norma
30、tive) Other international publications quoted in this standard with thereferences of the relevant Europeanpublications 35 Figure 1 Example of a bias network 19 Figure 2 Connection of a bias network 20 Figure 3 An example of a slant antenna rangesetting 20 Figure 4 Circuit arrangement for the measure
31、ment of polarization isolation 21 Figure 5 Circuit arrangement for the measurement of the impedance matching attheinput terminal 21EN 61079-1:1993 4 BSI 12-1999 Page Figure 6 Circuit arrangement for the measurement of the impedance matching attheoutput terminal 22 Figure 7 Circuit arrangement for th
32、e measurement of the gain versus frequency characteristics, the output signal level versustheinput signal level, the image suppressionratio, and the spurious responsesuppression ratio when input arrangement a) or b) (see2.2.4) is used 22 Figure 8 Circuit arrangement for the measurement of the gain v
33、ersus frequency characteristics, the output signal level versustheinput signal level, the image suppressionratio, and the spurious responsesuppression ratio when input arrangement c) (see2.2.4) is used 23 Figure 9 Example of the gain variation asafunction of the channel number 23 Figure 10 Example o
34、f the gain variation inachannel as a function of the frequency difference from the channel centre 24 Figure 11 Example of the output signal levelasafunction of the input signal level atthreerepresentative channels 24 Figure 12 Circuit arrangement for the measurement of the intermodulation and theint
35、ermediate frequency beat suppression ratiowhen input arrangement a) or b) (see2.2.4)isused 25 Figure 13 Circuit arrangement for the measurement of the intermodulation and theintermediate frequency beat suppression ratiowhen input arrangement c) (see2.2.4) is used 25 Figure 14 Example of the intermod
36、ulation suppression ratio as a function of the input signallevel for two kinds of interference signals 26 Figure 15 Circuit arrangement for themeasurement of noise figure and noisetemperature 26 Figure 16 Example of the noise figure asafunction of the channel number at two ambienttemperatures 27 Fig
37、ure 17 Circuit arrangement for the measurement of G/T 28 Figure 18 Example of the G/T as a functionoffrequency 28 Figure 19 Circuit arrangement for the measurement of G/T 29 Figure 20 Spectrum of satellite broadcastingwave 30 Page Figure 21 Spectrum of satellite broadcastingwave converted into an un
38、modulatedwave 30 Figure 22 Spectrum in the reference signalsimultaneous display system 31 Figure 23 Example of the image suppressionratioas a function of the channelnumber 31 Figure 24 Example of the spurious responsesuppression ratio as a function oftheinterference signal frequency 32 Figure 25 Exa
39、mple of the intermediate frequencybeat suppression ratio as a functionofthechannel number 32 Figure 26 Circuit arrangement for the measurement of the local oscillator frequencystability when input arrangementa)orb)(see2.2.4)is used 33 Figure 27 Circuit arrangement for the measurement of the local os
40、cillator frequencystability when input arrangementc)(see2.2.4) is used 33 Figure 28 Example of the initial variation ofthelocal oscillator frequency as a function of timeatroomtemperature 34 Figure 29 Example of the local oscillator frequency drift as a function of the ambient temperature 34 Table 1
41、 Example of the parameters of components inFigure 19 16EN 61079-1:1993 BSI 12-1999 5 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 the12GHz band. The channels are those defined by WA
42、RC 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 three main parts, the an
43、tenna, the depolarizer and optional orthomode transducer (OMT), and the SHF converter as defined in clause1.3. 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 measurement on the associat
44、ed DBS tuner unit are described inPart2 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, the editions indicated wer
45、e 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 ISO maintain registers of currently valid I
46、nternational 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 receivers for satellite broadcast tr
47、ansmissions in the12GHz band Part 2: Electrical measurements on DBS tuner units. 1.3 Definitions For the purpose of this International Standard, the following definitions apply. The outdoor unit is a part of the receiver for satellite broadcast transmissions in the12GHz band, and comprises three mai
48、n 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 optional orthomode transducer, OMT, which separates two incoming differently polarized signals into two independent
49、 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 the12GHz band to intermediate frequencies (often called the first i.f.) usually in the range of approximately1GHz to2GHz, 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 2.1.1 Introducti
