1、BRITISH STANDARD BS EN 61079-2:1995 IEC1079-2: 1992 Methods of measurement on receivers for satellite broadcast transmissions in the12GHz band Part 2: Electrical measurements on DBS tuner units The European Standard EN61079-2:1993 has the status of a BritishStandard UDC 621.396.722:629.783:620.1:621
2、.317.3.083BSEN 61079-2:1995 This BritishStandard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority oftheStandards Board and comes into effect on 15August1995 BSI01-2000 The following BSI references relate to the work on this standard: Com
3、mittee reference EPL/12 Special announcement in BSINews April1995 ISBN 0 580 24393 1 Committees responsible for this British Standard The preparation of this BritishStandard was entrusted to Technical Committee EPL/12, Radio communication, upon which the following bodies were represented: British Br
4、oadcasting 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 R
5、etailers Association Radiocommunications Agency Amendments issued since publication Amd. No. Date CommentsBSEN 61079-2:1995 BSI 01-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN61079-2 5 List of references Inside back coverBSEN 61079-2:1995
6、ii BSI 01-2000 National foreword This Part of BS EN61079 has been prepared by Technical Committee EPL/12 and is the English language version of EN61079-2:1993 Methods of measurement on receivers for satellite broadcast transmissions in the12GHz band Part2:Electrical measurements on DBS tuner units,
7、published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC1079-2:1992, published by the International Electrotechnical Commission (IEC). BS EN61079 is a multipart standard. The other Parts published to date are: Part1:1995, Radio-frequency measuremen
8、ts on outdoor units. Part3:1995, Electrical measurements of overall performance of receiver systems comprising an outdoor unit and a DBS tuner unit. Part5:1995, Electrical measurements on decoder units for MAC/packet systems. This Part of BS EN61079 defines the conditions and methods of measurement
9、to be applied to the tuner 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 CCIRRecommendation650. Performance requirements are not specified. A British
10、 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 Publication referred to Correspon
11、ding British Standard IEC107-1:1977 BS3549 Methods of measuring and expressing the performance of television receivers Part1:1979 General considerations and electrical measurements other than those at audio-frequencies EN61079-1:1993 (IEC1079-1:1992) BS EN61079 Methods of measurement on receivers fo
12、r satellite broadcast transmissions in the12GHz band Part1:1995 Radio-frequency measurements on outdoor units IEC569:1977 BS5876:1980 Guide for subjective viewing tests for television receivers Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title p
13、age, pages2 to36, an inside back cover 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 on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN61079-2 December1993 UDC
14、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 the12GHz band Part2: Electrical measurements on DBS tuner units (
15、IEC1079-2:1992) Mthodes de mesure sur les rcepteurs dmissions de radiodiffusion par satellite dans la bande12GHz Partie2: Mesures lectriques sur les syntoniseurs pour la radiodiffusion directe par satellite (CEI1079-2:1992) Meverfahren fr Empfnger fr Satelliten-Rundfunkbertragung im 12-GHz-Bereich T
16、eil2: Elektrische Messungen an Satellitenempfngern (IEC1079-2:1992) This European Standard was approved by CENELEC on1993-09-22. 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 sta
17、ndard 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. This European Standard exists in three official versions (English, French, German). A version in any ot
18、her 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 Austria, Belgium, Denmark, Finland, France, German
19、y, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secret
20、ariat: rue de Stassart 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref.No.EN61079-2:1993EEN 61079-2:1993 BSI 01-2000 2 Foreword At the request of the73rd CENELEC Technical Board, the International Standard IEC1079-2:1992 was submitted to the CENELEC Unique Acceptance Procedure (UA
21、P) in November1992 for acceptance as a European Standard. The text of the International Standard was approved by CENELEC as EN61079-2 on22September1993. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given onl
22、y for information. In this standard, Annex A is informative and Annex ZA is normative. Contents Page Foreword 2 Section 1. General 1.1 Scope 5 1.2 Normatives references 5 1.3 Definitions 5 1.3.1 DBS tuner unit 5 1.3.2 First intermediate frequency (first i.f.) 5 Section 2. General notes on measuremen
23、t 2.1 General conditions 6 2.1.1 Introduction 6 2.1.2 Test site 6 2.1.3 Environmental conditions 6 2.1.4 Power supply 6 2.1.5 Accuracy of measuring instruments 6 2.1.6 Stabilization period 6 2.2 Video, audio and digital test signals 6 2.2.1 Video test signals 6 2.2.2 Audio test signals 6 2.2.3 Data
24、signal content 6 2.3 Radio-frequency input signals 7 2.3.1 Input signals 7 2.3.2 Input signal levels 7 2.3.3 Setting of input signal level 7 2.4 Reference signals 7 2.4.1 Reference video signal 7 2.4.2 Reference audio signal 7 2.5 Standard measuring conditions 7 2.6 Measuring instruments 7 2.6.1 Tes
25、t signal generator 7 2.6.2 First i.f. modulator 7 2.6.3 C.W. signal generator 7 2.6.4 SWR bridge 7 2.6.5 Spectrum analyzer 7 2.6.6 Directional coupler 7 2.6.7 Input coupling network 8 2.6.8 Bias network 8 2.6.9 Bandpass filter 8 2.6.10 Lowpass filter 8 2.6.11 Variable bandpass filter 8 2.6.12 Video
26、noise meter 8 2.6.13 Group delay measuring instrument 8 2.6.14 Video monitor 8 latest date of publication ofan identical national standard (dop)1994-09-01 latest date of withdrawal ofconflicting national standards (dow)1994-09-01EN 61079-2:1993 BSI 01-2000 3 Page Section 3. Methods of measurement 3.
27、1 Impedance matching at input terminal 8 3.1.1 Introduction 8 3.1.2 Method of measurement 8 3.1.3 Presentation of results 8 3.2 Signal-to-noise ratio of video signal (unweighted) 8 3.2.1 Introduction 8 3.2.2 Method of measurement 9 3.2.3 Presentation of results 9 3.3 Truncation noise 9 3.3.1 Introdu
28、ction 9 3.3.2 Method of measurement 9 3.3.3 Presentation of results 9 3.4 Input signal level to output signal level characteristics 9 3.4.1 Introduction 9 3.4.2 Method of measurement 9 3.4.3 Presentation of results 10 3.5 Co-channel c.w. interference ratio 10 3.5.1 Introduction 10 3.5.2 Method of me
29、asurement 10 3.5.3 Presentation of results 10 3.6 Adjacent channel interference ratio 10 3.6.1 Introduction 10 3.6.2 Method of measurement 11 3.6.3 Presentation of results 11 3.7 Intermodulation interference ratio 11 3.7.1 Introduction 11 3.7.2 Method of measurement 11 3.7.3 Presentation of results
30、12 3.8 Image frequency interference ratio second i.f. 12 3.8.1 Introduction 12 3.8.2 Method of measurement 12 3.8.3 Presentation of results 12 3.9 Impairment due to spurious responses 12 3.9.1 Introduction 12 3.9.2 Method of measurement 12 3.9.3 Presentation of results 13 3.10 Stability of local osc
31、illator frequency 13 3.10.1 Introduction 13 3.10.2 Method of measurement 13 3.10.3 Presentation of results 13 Page 3.11 AFC characteristics of local oscillator 13 3.11.1 Introduction 13 3.11.2 Measurement 13 3.11.3 Presentation of results 14 3.12 Amplitude/frequency response of video channel 14 3.12
32、.1 Introduction 14 3.12.2 Method of measurement 14 3.12.3 Presentation of results 14 3.13 Group delay characteristics of video channel 14 3.13.1 Introduction 14 3.13.2 Method of measurement 14 3.13.3 Presentation of results 15 3.14 Linear waveform response of video channel 15 3.14.1 Introduction 15
33、3.14.2 Method of measurement 15 3.14.3 Presentation of results 16 3.15 Line time amplitude linearity of video signal 16 3.15.1 Introduction 16 3.15.2 Method of measurement 16 3.15.3 Presentation of results 17 3.16 Differential gain and differential phase characteristics with respect to the chrominan
34、ce sub-carrier 17 3.16.1 Introduction 17 3.16.2 Method of measurement 17 3.16.3 Presentation of results 17 3.17 Intermodulation between sound sub-carrier and chrominance sub-carrier 17 3.17.1 Introduction 17 3.17.2 Method of measurement 17 3.17.3 Presentation of results 17 3.18 Suppression of energy
35、 dispersal signal 18 3.18.1 Introduction 18 3.18.2 Method of measurement 18 3.18.3 Presentation of results 18 3.19 Power supply for outdoor unit 18 3.19.1 Introduction 18 3.19.2 Method of measurement 18 3.19.3 Presentation of results 18EN 61079-2:1993 BSI 01-2000 4 Page Annex A (informative) Bibliog
36、raphy 36 Annex ZA (normative) Other international publications quoted in this standard withthereferences of the relevant Europeanpublications 36 Figure 1 Notional block diagrams of DBStunerunits interfaced with outdoor unitsanddecoders 19 Figure 2 Examples of video signals 20 Figure 3 Notional block
37、 diagrams of the first i.f. modulators for measuring DBStunerunits 23 Figure 4 Example of bandpass filter formeasurement of interference 24 Figure 5 Example of4,5MHz lowpassfilter(NTSC) 24 Figure 6 Circuit arrangement for themeasurement of impedance matchingatinputterminal 25 Figure 7 Circuit arrang
38、ement for themeasurement of signal-to-noise ratioofvideosignal 25 Figure 8 Example of unweighted signal-to-noise ratio of video signal 25 Figure 9 Circuit arrangement for measurementof truncation noise 26 Figure 10 Circuit arrangement for measurementof input signal level to output signal level chara
39、cteristics 26 Figure 11 Circuit arrangement for measurement of co-channel c.w. interference ratio 26 Figure 12 Circuit arrangement for measurementof adjacent channel interferenceratio 27 Figure 13 Circuit arrangement for measurementof intermodulation interference ratio 27 Figure 14 Circuit arrangeme
40、nt for measurementof image frequency interferenceratio second i.f. 28 Figure 15 Circuit arrangement for measurementof spurious response 28 Figure 16 Example of spurious response 28 Figure 17 Circuit arrangement for measurementof stability of local oscillatorfrequency 29 Figure 18 Example of stabilit
41、y oflocaloscillatorfrequency 29 Page Figure 19 Circuit arrangement for measurementof AFC characteristics 29 Figure 20 Example of AFC characteristics 30 Figure 21 Circuit arrangement for measurementof amplitude/frequency responseofvideo channel 30 Figure 22 Example of amplitude/frequency response of
42、video channel 30 Figure 23 Circuit arrangement for measurementof the group delay characteristicsofvideo channel 31 Figure 24 Example of group delay characteristicsof video channel 31 Figure 25 Circuit arrangement for measurementof linear waveform response ofvideochannel 31 Figure 26 Bar response and
43、 pulse-to-bar ratio 32 Figure 27 Pulse response 32 Figure 28 Field frequency squarewaveresponse 32 Figure 29 Circuit arrangement for measurementof line time amplitude linearityofvideo signal 33 Figure 30 Circuit arrangement for measurementof differential gain and differentialphase characteristics wi
44、th respect to the chrominance sub-carrier in the digital sub-carrier/NTSC system 33 Figure 31 Examples of differential gain anddifferential phase characteristics with respectto the chrominance sub-carrier in the digital sub-carrier/NTSC system 33 Figure 32 Circuit arrangement for measurementof inter
45、modulation between soundsub-carrier and chrominance sub-carrier inthe digital sub-carrier/NTSC system 34 Figure 33 Example of intermodulation betweensound sub-carrier and chrominance sub-carrier in the digital sub-carrier/NTSC system 34 Figure 34 Circuit arrangement for measurementof suppression of
46、energy dispersalsignal 34 Figure 35 Circuit arrangement for measurementof supply voltage for outdoor unit 35 Table 1 Frequencies for reference video signals 7EN 61079-2:1993 BSI 01-2000 5 Section 1. General 1.1 Scope This part of IEC1079 applies to the tuner unit of a receiver for the direct recepti
47、on of satellite broadcast transmissions in the12GHz band. The channels are those defined by WARC BS-77 and RARC SAT-831 1)and the systems are those of CCIR Recommendation6501. The object of this part of IEC1079 is to define the conditions and methods of measurement to be applied. This part does not
48、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, usually in the range1GHz to2GHz, which is provided from an associated outdoor unit. The outdoor unit includes at least a microwave
49、antenna and the frequency converter to the first intermediate frequency. Methods of measurement on outdoor units are described in Part1 of International Standard IEC1079. A decoder for baseband and data signals may be included in the tuner unit. Methods of measurement of the decoder, however, are described in Parts4 and5 of International Standard IEC1079 (underconsideration). 1.2 Normative references The following normative documents contain provisions which, through r
