1、 ISO/IEC 15018 Edition 1.0 2009-04 INTERNATIONAL STANDARD Information technology Generic cabling for homes ISO/IEC 15018:2009/A1:2009(E) AMENDMENT 1 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2009 ISO/IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this pu
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8、you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csciec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 ISO/IEC 15018 Edition 1.0 2009-04 INTERNATIONAL STANDARD Information technology Generic cabling
9、for homes INTERNATIONAL ELECTROTECHNICAL COMMISSION C ICS 35.200 PRICE CODE ISBN 2-8318-1036-9 AMENDMENT 1 2 15018 Amend. 1 ISO/IEC:2009(E) FOREWORD Amendment 1 to International Standard ISO/IEC 15018 was prepared by subcommittee 25: Interconnection of information technology equipment, of ISO/IEC jo
10、int technical committee 1: Information technology. _ 2 Normative references Add the following new reference: IEC 60728-1:2007, Cable networks for television signals, sound signals and interactive services Part 1: System performance for forward paths 3 Terms, definitions and abbreviations 3.1 Terms a
11、nd definitions Add, after 3.1.39, the following new terms and definitions: 3.1.40 balun device to provide impedance transformation between balanced and unbalanced components 3.1.41 external network interface ENI connexion device between external network and network access cabling. NOTE For example,
12、equipment comprising HNI, and baluns where applicable, complies with this definition. 3.1.42 home network interface HNI interface for access to the network for distribution of television signal, sound signals and interactive services inside a home (single dwelling) 3.1.43 system outlet SO device for
13、 interconnecting a subscriber feeder and a receiver lead IEC 60728-1, 3.1.90 3.2 Abbreviations Add the following abbreviations in alphabetical order: HF High frequency UHF Ultra-high frequency VHF Very high frequency 15018 Amend. 1 ISO/IEC:2009(E) 3 Add, after Annex D, the following new Annex E: Ann
14、ex E (informative) Reference implementation of TV and radio applications Usage of baluns E.1 Types and locations of baluns E.1.1 General The connection of a BCT-B channel to equipment that has a 75 coaxial connection requires the use of a balun. Also the connection of a balanced BCT-B channel to a C
15、ATV network or any feeding coaxial system requires the use of a balun at the HNI (Home Network interface). Figures E.1 through to E.4 illustrate the location where a balun can be found in a home (single dwelling). NOTE By the use of baluns it is possible to run BCT applications via ICT permanent lin
16、ks in accordance with the manufacturers instructions. E.1.2 Baluns at the external network interface and baluns at the equipment interface toward the PHD BCT-B permanent link PHD Balanced splitter ENI HNI Balun Figure E.1 Balun at the ENI (External Network Interface) Figure E.1 illustrates a configu
17、ration where the home is fed with a coaxial system. A balun is used to connect this coaxial system to balanced cabling including the Primary Home Distributor (PHD). It is assumed that in this case the balun belongs to the application dependent equipment and therefore meets the application specific r
18、equirements to provide the home with signals complying with IEC 60728 (see Figure E.5 below). If the balun cannot cover the frequency range of forward (47 MHz to 862 MHz) and return path (5 MHz to 65 MHz), two types of baluns should be used, each one in the appropriate path. 4 15018 Amend. 1 ISO/IEC
19、:2009(E) BCT-B permanent link PHD Coaxial splitter ENI HNI Balun Figure E.2 Baluns in the PHD (Primary Home Distributor) Figure E.2 illustrates a configuration where the home is fed with a coaxial system. A balun is used to connect the coaxial system to the balanced Primary Home Distributor or direc
20、tly to a balanced permanent link. It is assumed that in this case the balun belongs to the application dependent equipment and therefore meets the application specific requirement to provide the balanced permanent link with signals complying with IEC 60728-1 (see Figure E.5 below). If the balun cann
21、ot cover the frequency range of forward (47 MHz to 862 MHz) and return path (5 MHz to 65 MHz), two types of baluns should be used, each one in the appropriate path. E.1.3 Baluns near or in the BO BCT-B permanent link Balun SO BO Figure E.3 Balun built-in the system outlet (SO) Figure E.3 illustrates
22、 the case where a balun is built into the wall outlet of the BO (only as an insert). In this case the unbalanced connector at the BO no longer exists though the permanent link shall meet the performance specified in Clause 9. When the input impedance is measured from the coaxial port of the balun it
23、 shall be 75 3 . When RL test is performed from the coaxial port of the balun it shall meet 14 dB in the range 5 MHz to 42 MHz or 5 MHz to 65 MHz (return path), 12 dB in the range of VHF and UHF TV up to 470 MHz, 10 dB from 470 MHz to 862 MHz. The insertion of the balun shall not degrade the couplin
24、g attenuation as given in Table 3 (Minimum performance of BCT-B channels). The insertion of the balun shall not affect carrier to noise, and carrier to composite beat shall comply with IEC 60728-1. The insertion of the balun shall not induce a total sectional longitudinal slope (from the HNI to the
25、coaxial port of the balun larger than the value given in Table E.1. 15018 Amend. 1 ISO/IEC:2009(E) 5 If the balun cannot cover the frequency range of forward (47 MHz to 862 MHz) and return path (5 MHz to 65 MHz), two types of baluns should be used, each one in the appropriate path. E.1.4 Baluns in t
26、he cord between BO and the terminal equipment BCT-B permanent link Balun SO BO TI Figure E.4 Balun in the cord between BO and the terminal equipment (TI: Terminal Input) Figure E.4 illustrates the case where a balun is in the equipment cord. When the input impedance is measured from the coaxial port
27、 of the equipment cord it shall be 75 3 . When RL test is performed from the coaxial port of the equipment cord it shall meet 14 dB in the range 5 MHz to 42 MHz or 5 MHz to 65 MHz (return path), 12 dB in the range of VHF and UHF TV up to 470 MHz, 10 dB from 470 MHz to 862 MHz. The insertion of the e
28、quipment cord shall not degrade the coupling attenuation as given in Table 3. The insertion of the equipment cord shall not affect carrier to noise, and carrier to composite beat shall comply with IEC 60728-1. The insertion of the equipment cord shall not induce a total sectional longitudinal slope
29、(from the HNI to the coaxial port of the balun) larger than the value given in Table E.1. If the balun cannot cover the frequency range of forward (47 MHz to 862 MHz) and return path (5 MHz to 65 MHz), two types of baluns should be used, each one in the appropriate path. 6 15018 Amend. 1 ISO/IEC:200
30、9(E) E.2 HNI Figure E.5 illustrates the different types of HNI (Home Network Interface). Depending upon the type the allowed total insertion loss and sectional longitudinal slope are given in Table E.1. NOTE This figure is an exerpt from IEC 60728-1, 7.1 (Figure 43 modified) to better understand the
31、 requirements of that standard. Splitter and other functions (*) HCL 1 : Home Cable Link 1 Total slope up to 5 dB or 11 dB Minimum signal level up to 18 dB over System Outlet minimum Slope up to 7 dB HNI 1 75 HD: Home Distributor Terminated, if not used SO Permanent link TI (coaxial) Coaxial system
32、outlet Receiver lead TERMINAL TV receiver or cable modem (coaxial input) HNI 2 75 SO Permanent link TI (coaxial) Receiver lead Coaxial system outlet Terminated, if not used HD: Home Distributor Minimum signal level 3 dB to 6 dB over System Outlet minimum Slope up to 7 dB Amplifier,splitter and other
33、 functions (*) HCL 2 : Home Cable Link 2 Total slope up to 5 dB or 11 dB TV receiver or cable modem (coaxial input) HNI 3 Case A 100 Permanent link TI (coaxial) Receiver lead HD: Home Distributor 100 Permanent link TI (coaxial) Receiver lead HD: Home Distributor TV receiver or cable modem (coaxial i
34、nput) HCL 3 : Home Cable Link 3 Total slope up to 5,6 dB or 11,6 dB Balun Balanced system outlet Terminated, if not used Minimum signal level 3 dB to 6 dB over System Outlet minimum Slope up to 7 dB Minimum signal level 3 dB to 6 dB over System Outlet minimum Slope up to 7 dB HNI 3 Case B Amplifier,
35、splitter and other functions (*) Amplifier,splitter and other functions (*) Terminated, if not used HCL 4 : Home Cable Link 4 Total slope up to 5 dB or 11 dB Balun SO Coaxial system outlet TERMINAL TERMINAL TERMINAL Figure E.5 Types of HNI Table E.1 Insertion loss and total sectional slope Type of H
36、NI Total insertion loss Total sectional slope HNI 1 See 60728-1 11 dB HNI 2 See 60728-1 11 dB HNI 3 Case A See 60728-1 11,6 dB HNI 3 Case B See 60728-1 11 dB INTERNATIONAL ELECTROTECHNICAL COMMISSION 3, rue de Varemb PO Box 131 CH-1211 Geneva 20 Switzerland Tel: + 41 22 919 02 11 Fax: + 41 22 919 03 00 infoiec.ch www.iec.ch
