1、BRITISH STANDARD BS EN 61079-3:1995 IEC 1079-3: 1993 Methods of measurement onreceivers for satellitebroadcast transmissions in the12GHz band Part3: Electrical measurements ofoverall performance of receiversystemscomprising an outdoor unitand a DBS tuner unit The European Standard EN61079-3:1993 has
2、 the status of a BritishStandard UDC 621.396.67:620.1:621.317.3.083BSEN61079-3:1995 This BritishStandard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15August1995 BSI 03-2000 The followi
3、ng BSI references relate to the work on this standard: Committee reference EPL/12 Special announcement in BSI News September1993 ISBN 0 580 24394 X Committees responsible for this BritishStandard The preparation of this BritishStandard was entrusted to Technical Committee EPL/12, Radiocommunication,
4、 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 Engineers International Consum
5、er Electronics Association Radio, Electrical and Television Retailers Association Radiocommunications Agency Amendments issued since publication Amd. No. Date CommentsBSEN61079-3:1995 BSI 03-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN6107
6、9-3 3 List of references Inside back coverBSEN61079-3:1995 ii BSI 03-2000 National foreword This Part of BS EN61079 has been prepared by Technical Committee EPL/12 and is the English language version of EN61079-3:1993 Methods of measurement on receivers for satellite broadcast transmissions in the12
7、GHz band Part3:Electrical measurements of overall performance of receiver systems comprising an outdoor unit and a DBS tuner unit, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC1079-3:1993, published by the International Electrotechnical
8、Commission (IEC). BS EN61079 is a multipart standard. The other Parts published to date are: Part1:1995, Radio-frequency measurements on outdoor units. Part2:1995, Electrical measurements on DBS tuner units. Part5:1995, Electrical measurements on decoder units for MAC/packet systems. This Part of BS
9、 EN61079 defines the conditions and methods of measurement of overall performance of receiver systems comprising an outdoor unit and a DBS tuner unit 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 s
10、ystems are those defined in CCIR Recommendation650. Performance requirements are not specified. This Part of BS EN61079 is intended to be used in conjunction with BS5876:1980 and BS EN61079-1:1995 and BS EN61079-2:1995. A British Standard does not purport to include all the necessary provisions of a
11、 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 Corresponding BritishStandard IEC107-1:1977 BS3549 Methods of measuring and expr
12、essing the performance of television receivers Part1:1979 General considerations and electrical measurements other than those at audio-frequencies IEC569:1977 BS5876:1980 Guide for subjective viewing tests for television receivers BS EN61079 Methods of measurement on receivers for satellite broadcas
13、t transmissions in the12GHz band EN61079-1:1993 (IEC1079-1:1992) Part1:1995 Radio-frequency measurements on outdoor units EN61079-2:1993 (IEC1079-2:1992) Part2:1995 Electrical measurements on DBS tuner units Summary of pages This document comprises a front cover, an inside front cover, pagesi andii,
14、 theEN title page, pages2 to14, 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 EN 61079-3 Ma
15、y 1993 UDC 621.396.67:620.1:621.317.3.083 Incorporates corrigendum August1993 Descriptors: Radiocommunications, satellite broadcasting, receivers, measurement, electric measurements English version Methods of measurement on receivers for satellite broadcasttransmissions in the12GHz band Part3:Electr
16、ical measurements of overall performance of receiver systems comprising an outdoor unit and a DBS tuner unit (IEC1079-3:1993) Mthodes de mesure sur les rcepteurs dmissions de radiodiffusion par satellite dans la bande12GHz Partie3: Mesures lectriques des performances globales des systmes de rception
17、 constitus dune unit extrieure et dun syntoniseur pour la radiodiffusion directe par satellite (CEI1079-3:1993) Meverfahren fr Empfnger fr Satelliten-Rundfunkbertragung im12-GHz-Bereich Teil3: Elektrische Meverfahren der Gesamteigenschaften von Empfangsanlagen aus Aueneinheit und Satellitenempfnger
18、fr direkten Satellitenempfang (IEC1079-3:1993) This European Standard was approved by CENELEC on1991-12-10. 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 alt
19、eration. 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 other language made by
20、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, Germany, Greece, Iceland, I
21、reland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland andUnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart
22、 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref. No. EN61079-3:1993 EEN61079-3:1993 BSI 03-2000 2 Foreword The text of documents12A(CO)151 and151A, as prepared by Subcommittee12A, Receiving equipment, of IEC Technical Committee12, Radiocommunications, was submitted to the IEC-CEN
23、ELEC parallel vote in May1991. The reference document was approved by CENELEC as EN61079-3 on10December1991. 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
24、 is informative and Annex ZA is normative. Contents Page Foreword 2 Section 1. General 1.1 Scope 3 1.2 Normative references 3 Section 2. General explanation of terms 2.1 Outdoor unit 3 2.2 DBS tuner unit 3 Section 3. General notes on measurements 3.1 General conditions 3 3.2 Video, audio and digital
25、 test signals 4 3.3 Radio-frequency input signals 4 3.4 Reference signals 4 3.5 Standard measuring conditions 4 3.6 Measuring instruments 5 Section 4. Methods of measurement 4.1 Sensitivity 5 4.2 Truncation noise 5 4.3 Spurious response 6 4.4 Differential gain and differential phase characteristics
26、with respect to the chrominance sub-carrier 7 4.5 Suppression of energy dispersal signal 7 4.6 Bit error rate versus input signal level 7 Annex A (informative) Bibliography 14 Annex ZA (normative) Other international publications quoted in this standard with thereferences of the relevant European pu
27、blications 14 Figure 1 Block diagram of RF modulator 8 Figure 2 Arrangement of equipment for measuring sensitivity 9 Figure 3 Arrangement of equipment for measuring truncation noise 10 Figure 4 Arrangement of equipment for measuring spurious response 11 Figure 5 Arrangement of equipment for measurin
28、g differential gain and differential phasecharacteristics 12 Figure 6 Arrangement of equipment formeasuring suppression of energy dispersalsignal 13 Table 1 Frequencies for composite referencevideosignal 7 latest date of publication ofan identical national standard (dop)1994-04-01 latest date of wit
29、hdrawal ofconflicting national standards (dow)1994-04-01EN61079-3:1993 BSI 03-2000 3 Section 1. General 1.1 Scope This part of IEC1079 applies to the conditions and methods of measurement of overall performance of receiver systems comprising an outdoor unit and a DBS tuner unit for direct reception
30、of satellite broadcast transmissions in the12GHz band. The channels are those defined by WARC BS-77 and RARC SAT-83 and the systems those of CCIR Recommendation6501 1) . The specifications of the limit values of the various parameters of the receiver systems are outside the scope of this standard. A
31、lthough individual performance of an outdoor unit and a DBS tuner unit can be measured by the methods defined by parts1 and2 of IEC1079, measurements of overall performance of a receiver system consisting of an indoor unit and a DBS tuner unit are also necessary for individual receiver installations
32、. A decoder, for baseband and data signals may be included in the receiver. Methods of measurement of the decoder, however, are described in parts4 and5 of IEC1079. NOTEMeasurement items for overall performance are confined to those which cannot be obtained by the measurements of each individual uni
33、t or may be affected by the combination of the units in the receiver. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC1079. At the time of publication, the editions indicated were valid. All
34、 normative documents are subject to revision, and the parties to agreement based on this part of IEC1079 are encouraged to investigate the possibility of applying the most recent editions of the normative documents listed below. Members of ISO and IEC maintain registers of currently valid Internatio
35、nal Standards. IEC107-1:1977, Recommended methods of measurement on receivers for television broadcast transmissions Part1: General considerations Electrical measurements other than those at audio-frequencies. IEC569:1977, Informative guide for subjective tests on television receivers. IEC1079-1:199
36、2, Methods of measurement on receivers for satellite broadcast transmissions in the12GHz band Part1: Radio frequency measurements on outdoor units for channels in the12GHz band. IEC1079-2:1992, Methods of measurement on receivers for satellite broadcast transmissions in the12GHz band Part2: Electric
37、al measurements on DBS tuner units. Section 2. General explanation of terms The following general definitions apply for the purpose of this standard. 2.1 Outdoor unit See part1,1.3. 2.2 DBS tuner unit See part2,1.3.1. Section 3. General notes on measurements 3.1 General conditions 3.1.1 Introduction
38、 Measurements shall be carried out in accordance with the following conditions to ensure consistent results. NOTEThe methods described here assume the use of the following transmission systems: Digital sub-carrier/NTSC, B-MAC, C-MAC/packet, D-MAC/packet and D2-MAC/packet. Information pertaining to t
39、hese systems may be found in the references listed in Annex A. 3.1.2 Set up of receiver An outdoor unit and a DBS tuner unit shall be connected together, using the cable specified by the manufacturer of the receiver. Its length shall be the maximum of the specified range. 3.1.3 Testing site Measurem
40、ents shall be carried out at a location that is not subject to external radio frequency interference. If interference cannot be avoided, the measurements shall be carried out in a screened room. 3.1.4 Environmental conditions Sections3,4 and5 of IEC107-1 shall be applied. 1) The figures in square br
41、ackets refer to the bibliography (Annex A).EN61079-3:1993 4 BSI 03-2000 3.1.5 Power supply A power supply equivalent to the rated voltage and rated frequency of the receiver shall be used. The fluctuation of the power supply voltage and frequency during the tests shall not exceed 2% and harmonic com
42、ponents of the power supply shall not exceed5%. 3.1.6 Accuracy of measuring instruments Requirements for the accuracy of measurements are not included in this standard, because they depend only on the purpose for which the measurements are required. The accuracy of the measuring instruments used, if
43、 known, shall either be stated as a percentage or in decibels as appropriate. Alternatively the precision class may be quoted as stated in the relevant publications (under consideration). 3.1.7 Stabilization period Unless otherwise specified, measurements shall be started at the time that stabilizat
44、ion of the characteristics is obtained. 3.2 Video, audio and digital test signals See part2, clause2.2. 3.3 Radio-frequency input signals 3.3.1 Input signals The following radio-frequency input signals shall be used: a) unmodulated carrier signal; b) carrier signals modulated by the test signals for
45、 the system in use. Unless otherwise specified, the carrier frequencies shall be selected from the nominal frequencies of the satellite broadcast channels, as specified by the standards of the country or countries for which the equipment under test was designed. 3.3.2 Radio-frequency input arrangeme
46、nt Depending on the input facilities of the equipment under test, the radio-frequency input signal can be applied in the following way: a) direct signal input to the SHF converter by means of a waveguide or a coaxial cable; b) radiated signal input to the receiving antenna by means of a transmitting
47、 antenna. (For detail, see part1,2.2.4.) 3.3.3 Input signal level In the case of direct signal input to the SHF converter, the input signal level shall be expressed in terms of available power dB (mW) at the output of the signal generator, including its associated network. In the case of radiated si
48、gnal input, the input signal level shall be expressed in terms of power flux density dB (W/m 2 ) at the aperture plane of the receiving antenna. (For detail, see part1,2.2.5.) 3.3.4 Setting of input signal level Input signal levels shall be specified for unmodulated carriers, even when modulated car
49、riers are used. The level setting can be made with a spectrum analyser. 3.4 Reference signals 3.4.1 Reference video signal For the measurements of noise and interference, a composite sine-wave signal specified in2.2.1 of part2 shall be used. Its sine-wave frequency is set at the frequency (f o ) shown in Table 1. The frequency (f o ) corresponds to the0dB crossover frequency of the pre-emphasis network. 3.4.2 Reference audio signal a) Digital sub-carrier/NTSC system A1kHz sine-wave signal at a level corresponding to f
