1、 CENELEC EN*bL077-2 93 R 3404583 0359303 940 W BRITISH STANDARD Methods of measurement on receivers for satellite broadcast transmissions in the 12 GHz band Part 2. Electrical measurements on DBS tuner units The European Standard EN 61079-2 : 1993 has the status of a British Standard I;DC 621.396.72
2、2 : 629.783 : 620.1 : 621.317.3.083 BS EN 61079-2 : 1995 IEC 1079-2 : 1992 CENELEC EN*bL079-2 93 m 3404583 OL59L04 887 = Amd. No. Date BS EN 61079-2 : 1995 Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee EPL
3、/12, Radio communication, upon which the following bodies were represented: British Broadcasting Corporation British Educational Equipment Association British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc Consumers Association Institution of Electrical Engin
4、eers 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 com
5、es into effect on 15 August 1995 O BSI 1995 The following BSI references relate to the work on this standard : Committee reference EPL/lZ Special announcement in BSI News April 1995 ISBN O 580 24393 1 CENELEC EN*b1079-2 93 = 3404583 0159105 713 = BS EN 61079-2 : 1995 Contents Committees responsible
6、National foreword Page Inside front cover 11 Foreword kxt of EN 61079-2 2 3 i CENELEC EN*bL079-2 93 m 3404583 OL5qLOb b5T m BS EN 61079-2 : 1995 National foreword This Part of BS EN 61079 has been prepared by Technical Committee EPL/12 and is the English language version of EN 61079-2 : 1993 Methods
7、 of measurmnt on receivers for satellite broadcast transmissions in the 12 GHx band Part 2 : Electrical measurmnts on DBS tuner units, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 1079-2 : 1992, published by the International Electrotec
8、hnical Commission (IEC). BS EN 61079 is a multipart standard. The other Parts published to date are: Part 1 : 1995 Part 3 : 1995 Part 5 : 1995 Radio-frequency measurements on outdoor units. Electrical measurements of overall performance of receiver systems comprising an outdoor unit and a DBS tuner
9、unit Electrical measurements on decoder units for MAUpacket systems This Part of BS EN 61079 defines the conditions and methods of measurement to be applied to the tuner unit of a receiver for the direct reception of satellite broadcast transmissions in the 12 GHz band. The channels are those define
10、d by WARC BS-77 and MRC SAT-83 and the systems are those defined in CCIR Recommendation 650. Performance requirements are not specified. Cross-references Publication referred to IEC 107-1 : 1977 Corresponding British Standard BS 3549 Methods of measuring and expressing the performance of television
11、receivers Part 1 : 1979 General considerations and electrical measurmnts other than those at audio-freqmwies BS EN 61079 Methods of measurement on receivers for satellite broadcast transmissions in the 12 GHx band Part 1 : 1995 Radio-frequency measurements on outdoor units BS 5876 : 1980 Guide for s
12、ubjective viewing tests for television receivers EN 61079-1 : 1993 (IEC 1079-1 : 1992) IEC 569 : 1977 Compliance with a British Standard does not of itself confer immunity from legal obligations. CENELEC EN*b107%-2 93 3404583 OL59L07 596 m EUROPEAN STANDARD EN 61079-2 NORME EUROPENNE EUROPISCHE NORM
13、 December 1993 UDC 621.396.722 : 629.783 : 620.1 : 621.317.3.083 Descriptors: Radiocommunications, satellite broadcasting, receivers, measurements, testing conditions English version Methods of measurement on receivers for satellite broadcast transmissions in the 12 GHz band Part 2: Electrical measu
14、rements on DBS tuner units (IEC 1079-2 : 1992) Mthodes de mesure sur les rcepteurs d?missions de radiodiffusion par satellite dans la bande 12 GHz Partie 2: Mesures lectriques sur les syntoniseurs pour la radiodiffusion directe MeBverfahren fr Empfnger fr Satelliten-Rundfunkbertragung im 12 - GHz- B
15、ereich Teil 2: Elektrische Messungen an Satellitenempfngern par satellite (CE1 1079-2 : 1992) (IEC 1079-2 : 1992) This European Standard 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
16、European Standard the status of a national standard without any alteration. Up-to-date lists and bibiographical 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 (
17、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 members are the national electrotechnical committees of Austr
18、ia, 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 Europen de Normalisation Electrotechnique Europisches Komit
19、ee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels O 1993 Copyright reserved to CENELEC members Ref. No. EN 61079-2 : 1993 E CENELEC EN*bL077-2 93 3404583 0157108 422 Page 2 EN 61079-2 : 1993 Foreword At the request of the 73rd CENELEC Technical Board, the Inter
20、national Standard IEC 1079-2 : 1992 was submitted to the CENELEC Unique Acceptance Procedure (UAP) in November 1992 for acceptance as a European Standard. The text of the International Standard was approved by CENELEC as EN 61079-2 on 22 September 1993. The following dates were fixed: - latest date
21、of publication of an identical national standard (dop) 1994-09-01 - latest date of withdrawal of conflicting national standards (dow) 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
22、 is informative and annex ZA is normative. CENELEC EN*bl79-2 93 = 3404583 0359307 367 Page 3 EN 61079-2 : 1993 CONTENTS Page SECTION 1 . GENERAL Clause 1.1 Scope 7 1.2 Normatives references . 7 1.3 Definitions 8 1.3.1 DBS tuner unit 8 1.3.2 First intermediate frequency (first .f.) . 8 SECTION 2 . GE
23、NERAL 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 2.1.6 Stabilization period 2.2.1 Video test signals . 2.2.2 Audio test signals . 2.2.3 Data signal content 2.1.5 Accuracy of measuring instruments . 2.2 Vide
24、o, audio and digital test signals 2.3 Radio-frequency input signals 2.3.1 Input signals . 2.3.2 Input signal levels 2.3.3 Setting of input signal level 2.4 Reference signals 2.4.1 Reference video signal . 2.4.2 Reference audio signal . 9 9 9 9 9 9 9 9 9 10 10 11 11 11 11 11 11 11 2.5 Standard measur
25、ing conditions . 12 CENELEC EN*bL079-2 93 3404583 0159110 080 = Page 4 EN 61079-2 : 1993 Clause Page 2.6 3.1 3.2 3.3 3.4 Measuring instruments 12 2.6.1 2.6.2 2.6.3 2.6.4 2.6.5 2.6.6 2.6.7 2.6.8 2.6.9 2.6.10 2.6.1 1 2.6.12 2.6.13 2.6.14 Test signal generator First i f. modulator C.W. signal generator
26、 . SWR bridge . Spectrum analyzer . Directional coupler . Input coupling network Bias network . Bandpass filter . Lowpass fitter Variable bandpass filter Video noise meter Group delay measuring instrument . Video monitor . SECTION 3 . METHODS OF MEASUREMENT Impedance matching at input terminal 3.1.1
27、 Introduction . 3.1.2 Method okneasurement . 3.1.3 Presentation of results Signal-to-noise ratio of video signal (unweighted) 3.2.1 Introduction . 3.2.2 Method of measurement . 3.2.3 Presentation of results Truncation noise . 3.3.1 Introduction . 3.3.2 Method of measurement . 3.3.3 Presentation of r
28、esults Input signal level to output signal level characteristics 12 12 12 12 12 13 13 13 13 13 13 13 13 13 14 14 14 14 14 14 15 15 15 15 15 16 16 3.4.1 Introduction . 16 3.4.2 Method of measurement . 16 3.4.3 Presentation of results 17 CENELEC ENabL079-2 93 M 3404583 OL59LlL T17 = Clause 3.5 3.6 3.7
29、 3.8 3.9 Page 5 EN 61079-2 : 1993 Cochannel C.W. interference ratio 3.5.1 Introduction . 3.5.2 Method of measurement . 3.5.3 Presentation of results Adjacent channel interference ratio 3.6.1 Introduction . 3.6.2 Method of measurement . 3.6.3 Presentation of results Intermodulation interference ratio
30、 3.7.1 Introduction . 3.7.2 Method of measurement . 3.7.3 Presentation of results Image frequency interference ratio . second i.f. 3.8.1 Introduction . 3.8.2 Method of measurement . 3.8.3 Presentation of results Impairment due to spurious responses 3.9.1 Introduction . 3.9.2 Method of measurement .
31、3.9.3 Presentation of results 3.10 Stability of local oscillator frequency . 3.10.1 Introduction . 3.1 0.2 Method of measurement . 3.1 0.3 Presentation of results 3.1 1 AFC characteristics of local oscillator . 3.1 1.1 Introduction . 3.1 1.2 Measurement 3.1 1.3 Presentation of results 3.1 2 Amplitud
32、eifrequency response of video channel 3.1 2.1 Introduction . 3.12.2 Method of measurement . Page 17 17 17 18 18 18 18 19 19 19 20 20 21 21 21 22 22 22 22 23 23 23 23 24 24 24 24 25 25 25 25 3.1 2.3 Presentation of results 25 CENELEC EM*bL79-2 93 m 3404583 OL59LL2 953 W Clause 3.1 3 Group delay chara
33、cteristics of video channel 3.13.1 Introduction . 3.13.2 Method of measurement . 3.13.3 Presentation of results 3.14 Linear waveform response of video channel . 3.14.1 Introduction . 3.14.2 Method of measurement . 3.14.3 Presentation of results 3.1 5 Line time amplitude linearity of video signal 3.1
34、5.1 Introduction . 3.15.2 Method of measurement . 3.15.3 Presentation of results sub-carrier . 3.1 6.1 Introduction . 3.16.2 Method of measurement . 3.1 6.3 Presentation of results 3.1 6 Differential gain and differential phase characteristics with respect to the chrominance 3.1 7 Intermodulation be
35、tween sound sub-carrier and chrominance sub-carrier . 3.17.1 Introduction . 3.1 7.2 Method of measurement . 3.17.3 Presentationof results 3.18 Suppression of energy dispersal signal 3.18.1 Introduction . 3.18.2 Method of measurement . 3.18.3 Presentation of results 3.1 9 Power supply for outdoor uni
36、t 3.1 9.1 Introduction . 3.19.2 Method of measurement . 3.19.3 Presentation of results . Figures . Annex A (informative) - Bibliography Annex ZA (normative) Other international publications quoted in this standard with the Page 6 EN 61079-2 : 1993 Page 25 25 26 2G 26 26 27 29 29 29 29 30 30 30 30 30
37、 30 30 30 31 31 31 31 32 32 32 32 32 33 53 references of the relevant European publications . 54 CENELEC EN*bLD79-2 93 W 3404583 0357113 89T 9 Page 7 EN 61079-2 : 1993 METHODS OF MEASUREMENT ON RECEIVERS FOR SATELLITE BROADCAST TRANSMISSIONS IN THE 12 GHz BAND Part 2: Electrical measurements on DBS
38、tuner units SECTION 1 - GENERAL 1.1 Scope This part of IEC 1079 applies to the tuner 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 SAT-83 1* and the systems are those of CCIR Recommendation 6
39、50 l. The object of this pari of IEC 1079 is to define the conditions and methods of measure- ment to be applied. This part does not specify performance requirements. The tuner unit comprises the channel selector and FM demodulator. The input to this unit is a group of intermediate frequency signals
40、, usually in the range 1 GHz to 2 GHz, which is provided from an associated outdoor unit. The outdoor unit includes at least a micro- wave antenna and the frequency converter to the first intermediate frequency. Methods of measurement on outdoor units are described in Part 1 of International Standar
41、d IEC 1079. A decoder for baseband and data signals may be included in the tuner unit. Methods of measurement of the decoder, however, are described in Parts 4 and 5 of International Standard IEC 1079 (under consideration). 1.2 Normative references The following normative documents contain provision
42、s which, through reference in this text, constitute provisions of this part of IEC 1079. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agree- ments based on this part of IEC 1079 are encouraged to investigate the possib
43、ility of applying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 107-1 : 1977, Recommended methods of measurement on receivers for television broadcast transmissions - Part i : General con
44、siderations - Electrical measurements other than those at audio-frequencies. The figures in square brackets refer to the Bibliography (annex A). CENELEC EN*bZ079-2 93 3404583 0159114 726 Page 8 EN 61079-2 : 1993 IEC 1079: 1992, Methods of measurement on receivers for satellite broadcast transmis- si
45、ons in the 12 GHz band - Part 7: adio-frequency measurements on outdoor units. IEC 569: 1977, Informative guide for subjective tests on television receivers. CCIR Recommendation 421 -1 : 1966, Requirements for the transmission of television signals over long distances (System 1 excepted) CCIR Recomm
46、endation 500-3: 1986, Method for the subjective assessment of the quality of television pictures. 1.3 Definitions For the purpose of this pari of IEC 1079, the following definitions apply. 1.3.1 DBS tuner unit The function of this unit is to select a desired channel from a group of signals received
47、and converted to a first intermediate frequency by the outdoor unit and to provide demodu- lated outputs. The exact configuration of the unit depends on the overall product design and the related transmission standards that the equipment is designed to receive. In the description of the measurement
48、methods, it is assumed that the arrangement of the units is similar to the notional block diagrams shown in figure 1. Examples are given of units for the MAC systems and the digital sub-carrier/NTSC system. A decoder for the baseband signals may be incorporated in the unit or attached to it as a sep
49、arate unit. In the latter case, it is assumed that the tuner unit has the following inter- faces to the decoder: a) MAC systems: output for MAC composite video and data signal output for MAC data signal (optional). b) Digital sub-carrier/NTSC system: output for NTSC video signal output for digital sound/data signal. 1.3.2 The first intermediate frequency produced by the outdoor unit is usually in the band of 1 GHz to 2 GHz. First intermediate frequency (first if.) CENELEC EN*b1079-2 93 3404583 OL5ql115 662 Page 9 EN 61079-2 : 1993 SECTION 2 - GENERAL NOTES ON
