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1、BRITISH STANDARD BS EN 50083-4:1995 Cabled distribution systems for television and sound signals Part 4: Passive coaxial wideband distribution equipment The European Standard EN 50083-4:1994 has the status of a British Standard UDC 621.397.743 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 0
2、7:55:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50083-4:1995 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board (L/1), was published under the authority of the Standards Board and comes into effect on 15 April 1995 BSI 04-1999 The following
3、BSI references relate to the work on this standard: Committee reference EEL/25 Draft for comment 91/32582 DC ISBN 0 580 23898 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee EEL/25, Radio communication, upon which the f
4、ollowing bodies were represented: British Broadcasting Corporation British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc Cable Television Association of Great Britain Confederation of Aerial Industries Electricity Association Institution of Electrical Engine
5、ers Radio, Electrical and Television Retailers Association Radiocommunications Agency Society of Cable Television Engineers Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50083-
6、4:1995 BSI 04-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 50083-43 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50083-4:1995 ii BSI 04-199
7、9 National foreword This British Standard has been prepared by Technical Committee EEL/25 and is the English language version of EN 50083-4:1994 Cabled distribution systems for television and sound signals Part 4: Passive coaxial wideband distribution equipment, published by the European Committee f
8、or Electrotechnical Standardization (CENELEC). It forms Part 4 of a multi-Part standard on cabled distribution systems for television and sound signals. Other Parts to follow will cover terms and definitions, electromagnetic compatibility for components and systems, active coaxial wideband distribut
9、ion equipment, headend equipment, optical equipment, system performance, digital cable television equipment for coaxial cabled distribution systems, and digital cable television equipment for optical cabled distribution systems. This Part identifies performance requirements and specifies data public
10、ation requirements for certain parameters; stipulates methods of measurement; and introduces minimum requirements defining quality (Q) grade (s). It covers frequencies from 5 MHz to 1 750 MHz and applies to receiver leads, system outlets, splitters and subscriber taps, passive one- and two-port devi
11、ces comprising filters, attenuators, equalizers, galvanic isolators, power injectors, cable splices, terminating resistors and transfer points. It excludes coaxial cables. Cross-references Publication referred toCorresponding British Standard EN 50083BS EN 50083 Cabled distribution systems for telev
12、ision and sound signals EN 50083-1:1993 EN 50083-3:1994 Part 1:1994 Safety requirementsPart 3:1995 Active coaxial wideband distribution equipment EN 50083-5:1994Part 5:1994 Headend equipment EN 60068 HD 323 series BS EN 60068 Environmental testingBS 2011 Environmental testing EN 60169-24:1993BS EN 6
13、0169 Radio-frequency coaxial connectors Part 24:1994 Radio-frequency coaxial connectors with screw coupling, typically for use in 75 ohm cable distribution systems (Type F) EN 60529:1991BS EN 60529:1992 Specification for degrees of protection provided by enclosures (IP code) BS 3041 Radio-frequency
14、connectors HD 134.1 S1Part 1:1977 Specification for general requirements and measuring methods HD 134.2 S2Part 2:1977 Specification for coaxial unmatched connector HD 571 S1BS 7477:1991 Guide for general principles for the creation of graphical symbols for use on equipment Licensed Copy: sheffieldun
15、 sheffieldun, na, Mon Nov 06 07:55:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50083-4:1995 BSI 04-1999iii A British 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 Br
16、itish Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, the EN title page, pages 1 to 14, an inside back cover and a back cover. This standard has been updated (see copyright date) and may
17、 have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:54 GMT+00:00 20
18、06, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50083-4 May 1994 UDC 621.397.743 Descriptors: Telecasting, cable television, sound broadcasting, television broadcasting, community aerial systems, coaxial cables, components, measuring techniques, specifications Eng
19、lish version Cabled distribution systems for television and sound signals Part 4: Passive coaxial wideband distribution equipment Systmes de distribution par cble destins aux signaux de radiodiffusion sonore et de tlvision Partie 4: Matriels passifs utiliss dans les systmes de distribution coaxiale
20、large bande Kabelverteilsysteme fr Ton- und Fernsehrundfunk- Signale Teil 4: Passive Breitbandgerte fr koaxiale Verteilnetze This European Standard was approved by CENELEC on 22 September 1993. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditio
21、ns for giving this European Standard the status of a national standard 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
22、 official versions (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
23、 committees of Austria, 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 Electrotechniq
24、ue Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1994 Copyright reserved to CENELEC members Ref. No. EN 50083-4:1994 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50083-4:199
25、4 BSI 04-1999 2 Foreword This European Standard was prepared by CENELEC Technical Committee TC 109, Cabled distribution systems for television and sound signals. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50083-4 on 1993-09-22. The following dates were f
26、ixed: For products which have complied with the relevant national standard before 1994-12-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for production until 1999-12-01. Annexes designated “normative” are part of the body of the standard. An
27、nexes designated “informative” are given only for information. In this standard, Annex A and Annex B are normative and Annex C is informative. Contents Page Foreword2 1Scope3 2Terms and definitions3 3Methods of measurement6 3.1Measurements of attenuation, etc.6 3.2Return loss measurements6 4Performa
28、nce requirements and recommendations6 4.1Safety6 4.2Electromagnetic compatibility (EMC)6 4.3Environmental6 4.4Marking6 4.5Impedance6 4.6Return loss7 5Receiver lead7 5.1Introduction7 5.2Electrical and mechanical parameters and requirements7 6System outlet7 6.1Description7 6.2Quality grading7 Page 6.3
29、Mechanical requirements8 6.4Electrical parameters and requirements8 7Splitters and subscriber taps9 7.1Description9 7.2Mechanical requirements for connectors9 7.3Electrical parameters and requirements9 8Passive one or two port devices10 8.1Description10 8.2Mechanical requirements for connectors10 8.
30、3Electrical parameters and requirements10 Annex A (Normative) List of normative references12 Annex B (Normative) Special national conditions12 Annex C (Informative) A-deviations13 Table 1 Return loss or attenuation requirements for all equipment7 Table 28 Table 39 Table 410 Table 510 latest date of
31、publication of an identical national standard (dop) 1994-12-01 latest date of withdrawal of conflicting national standards (dow) 1994-12-01 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50083-4:1994 BSI 04-19993 1 Scope This standard ap
32、plies to receiver leads, system outlets, splitters and subscriber taps, passive one and two port devices comprising filters, attenuators, equalizers, galvanic isolators, power injectors, cable splices, terminating resistors and transfer points, but excluding coaxial cables. It covers the frequency r
33、ange 5 MHz to 1 750 MHz; identifies performance requirements for certain parameters; lays down data publication requirements for certain parameters; stipulates methods of measurement; introduces minimum requirements defining quality (Q) grade(s). There are three Q grades for taps and splitters and t
34、wo Q grades for passive one and two port devices. There is only one Q grade for system outlet and receiver lead. Different networks require the same performance and, when integrating networks, upgrading will be avoided. Practical experience has shown these types meet most of the technical requiremen
35、ts necessary for supplying a minimum signal quality to the subscribers. This classification shall not be considered as a requirement but as the information for users and manufacturers on the minimum quality criteria of the material required to install networks of different sizes. The system operator
36、 has to select appropriate material to meet the minimum signal quality at the subscribers outlet and to optimize cost/performance, taking into account the size of the network and local circumstances. All requirements and published data shall be understood as guaranteed values within the specified fr
37、equency range and in well matched conditions. For passive equipment of quality grades other than mentioned above, manufacturers shall specify minimum values for: return loss; isolation; directivity; using the relevant measurement methods and the presentation of Table 1. 2 Terms and definitions For t
38、he purpose of this standard, the following definitions apply. 2.1 feeder a transmission path forming part of a cabled distribution system. Such a path may consist of a metallic cable, optical fibre, waveguide or any combination of them. By extension, the term is also applied to paths containing one
39、or more radio links 2.2 spur feeder a feeder to which splitters, subscriber taps or looped system outlets are connected 2.3 subscriber feeder a feeder connecting a subscriber tap to a system outlet or, where the latter is not used, directly to the subscriber equipment NOTEA subscriber feeder may inc
40、lude filters and balun transformers. 2.4 splitter (spur unit) a device in which the signal power at the (input) port is divided equally or unequally between two or more (output) ports NOTESome forms of this device may be used in the reverse direction for combining signal energy. Licensed Copy: sheff
41、ieldun sheffieldun, na, Mon Nov 06 07:55:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50083-4:1994 4 BSI 04-1999 2.5 directional coupler a splitter in which the attenuation between any two output ports exceeds the sum of the attenuations between the input port and each of those output ports 2.6
42、equalizer a device designed to compensate over a certain frequency range for the amplitude/frequency distortion or phase/frequency distortion introduced by feeders or equipment NOTEThis device is for the compensation of linear distortions only. 2.7 subscriber tap a device for connecting a subscriber
43、 feeder to a spur feeder 2.8 system outlet a device for interconnecting a subscriber feeder and a receiver lead 2.9 looped system outlet a device through which the spur feeder passes and to which is connected a receiver lead, without the use of a subscriber feeder 2.10 receiver lead a lead which con
44、nects the system outlet to the subscriber equipment NOTEA receiver lead may include filters and balun transformers in addition to the cable. 2.11 decibel ratio ten times the logarithm of the ratio of two quantities of power P1 and P2, i.e. 2.12 standard reference power and voltage in cabled systems
45、the standard reference power, Po, is 1/75 pW NOTEThis is the power dissipated in a 75 ohm resistor with a voltage drop of lV rms across it. the standard reference voltage, Uo, is 1V 2.13 level the level of any power P1 is the decibel ratio of that power to the standard reference power Po, i.e. the l
46、evel of any voltage U1 is the decibel ratio of that voltage to the standard reference voltage Uo, i.e. this may be expressed in decibel (relative to 1V in 75 ohm) or more simply in dB (V) if there is no risk of ambiguity 10 lg P1 P2 - -dB() 10 lg P1 P0 - - 20 lg U1 U0 - - Licensed Copy: sheffieldun
47、sheffieldun, na, Mon Nov 06 07:55:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50083-4:1994 BSI 04-19995 2.14 attenuation the ratio of the input power to the output power of an equipment or system, usually expressed in decibel 2.15 amplitude frequency response the gain or loss of an equipment or
48、 system plotted against frequency 2.16 isolation the attenuation between two output, tap or interface ports of any equipment or system 2.17 directivity the attenuation between the output port and interface or tap port minus the attenuation between input and interface or tap port, of any equipment or
49、 system 2.18 chrominance/luminance delay inequality the delay inequality in nanoseconds, between the luminance and chrominance (4,43 MHz) within a single PAL/SECAM televison channel. The worst case channels shall be identified by frequency 2.19 transfer point the interface between the cable distribution network and the buildings internal network, each of which may be separately owned. The transfer point may contain a voltage dependent device and/or a galvanic isolator 2.20 well-matched the matching condition