1、BRITISH STANDARDBS EN60728-7-1:2005Cable networks fortelevision signals,sound signals andinteractive services Part 7-1: Hybrid Fibre Coax OutsidePlant Status Monitoring Physical (PHY) Layer SpecificationThe European Standard EN 60728-7-1:2005 has the status of aBritish StandardICS 35.100.10; 33.160.
2、01; 33.040.01g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58- -1:2005+A1:2015BS EN 60728-7-1:2005+A1:2015ISBN 978 0 580 79846 7Amendments/corrigend
3、a issued since publicationDate Comments31 July 2015 Implementation of IEC amendment 1:2015 with CENELEC endorsement A1:2015This British Standard was published under the authority of the Standards Policy and Strategy Committee on 16 March 2005 The British Standards Institution 2015. Published by BSI
4、Standards Limited 2015National forewordThis British Standard is the UK implementation of EN 60728-7-1:2005+A1:2015. It is identical to IEC 60728-7-1:2003+A1:2015. It supersedes BS EN 60728-7-1:2005 which will be withdrawn on 3 June 2018.The start and finish of text introduced or altered by amendment
5、 is indicated in the text by tags. Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated by .The UK participation in its preparation was entrusted by Technical Committee EPL/100, Audio, video and multimedia systems and eq
6、uipment, to Subcommittee EPL/100/4, Cable distribution equipment and systems.A list of organizations represented on this subcommittee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its cor
7、rect application.Compliance with a British Standard cannot confer immunity from legal obligations.EUROPEAN STANDARD EN 60728-7-1 NORME EUROPENNE EUROPISCHE NORM February 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches K
8、omitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60728-7-1:2005 E ICS 35.100.10; 33.160; 33.040 English version Cable networks for
9、television signals, sound signals and interactive services Part 7-1: Hybrid Fibre Coax Outside Plant Status Monitoring Physical (PHY) Layer Specification (IEC 60728-7-1:2003) Rseaux de distribution par cbles pour signaux de tlvision, signaux de radiodiffusion sonore et services interactifs Partie 7-
10、1: Surveillance de ltat des installations extrieures des rseaux hybrides fibre optique et cble coaxial - Spcification de la couche physique (CEI 60728-7-1:2003) Kabelnetze fr Fernsehsignale, Tonsignale und interaktive Dienste Teil 7-1: Zustandsberwachung Hybrid-Faser-Koax-Netze (HFC) Festlegung Bitb
11、ertragungsschicht (PHY)(IEC 60728-7-1:2003) This European Standard was approved by CENELEC on 2004-12-01. 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 alter
12、ation. 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 one official version (English). A version in any other language made by translation under the
13、 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece
14、, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 60728-7-1:2005+A1June 2015Foreword The text of the International Standard IEC 60728-7-1:2003, prepared by technical a
15、rea 5: Cable networks for television signals, sound signals and interactive services, of IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the formal vote and was approved by CENELEC as EN 60728-7-1 on 2004-12-01 without any modification. The following dates were fixed:
16、 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2005-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-12-01 _ Endorsement notice The text of the Inte
17、rnational Standard IEC 60728-7-1:2003 was approved by CENELEC as a European Standard without any modification. _ Page 2EN 6072871:20052BS EN 60728-7-1:2005+A1:2015EN 60728-7-1:2005+A1:2015EN 60728-7-1:2005/A1:2015 2 European foreword The text of document 100/2417/FDIS, future edition 1 of IEC 60728-
18、7-1:2003/A1, prepared by Technical Area 5 “Cable networks for television signals, sound signals and interactive services” of IEC/TC 100 “Audio, video and multimedia systems and equipment“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60728-7-1:2005/A1:2015. The followi
19、ng dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2016-03-03 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2018-06-03 Attention
20、is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60728-7-1:2003/A1:2015 was approve
21、d by CENELEC as a European Standard without any modification. European foreword to amendment A1CONTENTS INTRODUCTION.4 1 Scope.5 2 Normative references .6 3 Terms, definitions and abbreviations 6 3.10 Abbreviated terms .7 4 HMS reference architecture forward and return channel specifications .8 4.1
22、HMS specification documents8 4.2 Functional assumptions.9 5 Physical layer specification.9 5.1 Separate forward and return channels.9 5.2 Single forward and return path channels .10 5.3 Byte-based transmission .10 5.4 Byte formats and transmission order .10 5.5 Packet-based transmission10 5.6 Duplex
23、 operation .10 5.7 Forward and return channel specifications.10 5.8 Media access control layer interface17 5.9 RF cut-off 17 Bibliography18 Figure 1 HMS Reference architecture diagram.8 Figure 2 Bit transmission order 10 Table 1 Transponder type classifications .5 Table 2 HMS document family .8 Tabl
24、e 3 Spectral limits by geographical area9 Table 4 HMS PHY channel RF and modulation specifications 11 Page 3EN 6072871:20053BS EN 60728-7-1:2005+A1:2015EN 60728-7-1:2005+A1:2015(North America and Europe)4BS EN 60728-7-1:2005+A1:2015EN 60728-7-1:2005+A1:2015INTRODUCTIONStandards and other deliverable
25、s of the IEC 60728 series deal with cable networks including equipment and associated methods of measurement for headend reception, processing and distribution of television and sound signals and for processing, interfacing and transmitting all kinds of data signals for interactive services using al
26、l applicable transmission media. These signals are typically transmitted in networks by frequency-multiplexing techniques.This includes for instance regional and local broadband cable networks, extended satellite and terrestrial television distribution systems, individual satellite and terrestrial t
27、elevision receiving systems,and all kinds of equipment, systems and installations used in such cable networks, distribution and receiving systems.The extent of this standardization work is from the antennas and/or special signal source inputs to the headend or other interface points to the network u
28、p to the terminal input of the customer premises equipment.The standardization work will consider coexistence with users of the RF spectrum in wired and wireless transmission systems.The standardization of any user terminals (i.e. tuners, receivers, decoders, multimedia terminals, etc.) as well as o
29、f any coaxial and optical cables and accessories thereof is excluded.CABLE NETWORKS FOR TELEVISION SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICES Part 7-1: Hybrid Fibre Coax Outside Plant status monitoring Physical (PHY) layer specification 1 Scope This part of IEC 60728 specifies requirements for
30、The Hybrid Fibre Coax (HFC) Outside Plant (OSP) Physical (PHY) Layer Specification and is part of the series of specifications developed by the Hybrid Management Sub-Layer (HMS) subcommittee under the SCTE. The purpose of the HMS specification is to support the design and implementation of interoper
31、able management systems for evolving HFC cable networks. The HMS Physical (PHY) Layer Specification describes the physical layer portion of the protocol stack used for communication between HMS-compliant transponders interfacing to managed outside plant network elements (NE) and a centralized head-e
32、nd element (HE). This standard describes the PHY layer requirements that must be implemented by all Type 2 and Type 3 compliant OSP HMS transponders on the HFC plant and the controlling equipment in the head-end. Any exceptions to compliance with this standard will be specifically noted herein as ne
33、cessary. Refer to Table 1 for a full definition of the type classifications. Electromagnetic Compatibility (EMC) is not specified in this standard and is left to the vendor to ensure compliance with local EMC regulatory requirements. Other than operating temperature, physical parameters such as shoc
34、k, vibration, humidity, etc., are also not specified and left to the vendors discretion. Transponder type classifications referenced within the HMS series of standards are defined in Table 1. Table 1 Transponder type classifications Type Description Application Type 0 Refers to legacy transponder eq
35、uipment, which is incapable of supporting the HMS specifications This transponder interfaces with legacy network equipment through proprietary means. This transponder could be managed through the same management applications as the other types through proxies or other means at the head-end Type 1 Re
36、fers to stand-alone transponder equipment (legacy or new) which can be upgraded to support the HMS specifications This transponder interfaces with legacy network equipment through proprietary means. Type 1 is a standards-compliant transponder (either manufactured to the standard or upgraded) that co
37、nnects to legacy network equipment via a proprietary interface Type 2 Refers to a stand-alone, HMS-compliant transponder This transponder interfaces with network equipment designed to support the electrical and physical specifications defined in the HMS standards. It can be factory or field-installe
38、d. Its RF connection is independent of the monitored NE Type 3 Refers to a stand-alone or embedded, HMS-compliant transponder This transponder interfaces with network equipment designed to support the electrical specifications defined in the HMS standards. It may or may not support the physical spec
39、ifications defined in the HMS standards. It can be factory-installed. It may or may not be field-installed. Its RF connection is through the monitored NE Page 5EN 6072871:20055BS EN 60728-7-1:2005+A1:2015EN 60728-7-1:2005+A1:20152 Normative references None. 3 Terms, definitions and abbreviations For
40、 the purposes of this document, the following terms and definitions apply. 3.1 forward spectrum the pass-band of frequencies in HFC cable systems with a lower edge of between 48 MHz and 87,5 MHz, depending on the particular geographical area, and an upper edge that is typically in the range of 300 M
41、Hz to 860 MHz depending on implementation 3.2 full spectrum combined forward and return spectrums in HFC cable systems and excludes any guard band 3.3 guard band unused frequency band between the upper edge of the usable return spectrum and the lower edge of the usable forward spectrum in HFC cable
42、systems 3.4 network element (NE) active element in the outside plant that is capable of receiving commands from a head-end element (HE) in the head-end and, as necessary, providing status information and alarms back to the HE 3.5 open system interconnection (OSI) framework of International Organizat
43、ion for Standardization (ISO) standards for commu-nication between multi-vendor systems that organizes the communication process into seven different categories that are placed in a layered sequence based on the relationship to the user. Each layer uses the layer immediately below it and provides se
44、rvices to the layer above. Layers 7 through 4 deal with end-to-end communication between the message source and destination, and layers 3 through 1 deal with network functions 3.6 physical (PHY) layer layer 1 in the Open System Interconnection (OSI) architecture; the layer that provides services to
45、transmit bits or groups of bits over a transmission link between open systems and which entails electrical, mechanical and handshaking procedures 3.7 return spectrum pass-band of frequencies in HFC cable systems with a lower edge of 5 MHz and an upper edge that is typically in the range of 42 MHz to
46、 65 MHz depending on the particular geographical area 3.8 transponder device in the outside plant that interfaces to outside plant NEs and relays status and alarm information to the HE. It can interface with an active NE via an arrangement of parallel analogue, parallel digital and serial ports Page
47、 6EN 6072871:20052 Normative references None. 3 Terms, definitions and abbreviations For the purposes of this document, the following terms and definitions apply. 3.1 forward spectrum the pass-band of frequencies in HFC cable systems with a lower edge of between 48 MHz and 87,5 MHz, depending on the
48、 particular geographical area, and an upper edge that is typically in the range of 300 MHz to 860 MHz depending on implementation 3.2 full spectrum combined forward and return spectrums in HFC cable systems and excludes any guard band 3.3 guard band unused frequency band between the upper edge of th
49、e usable return spectrum and the lower edge of the usable forward spectrum in HFC cable systems 3.4 network element (NE) active element in the outside plant that is capable of receiving commands from a head-end element (HE) in the head-end and, as necessary, providing status information and alarms back to the HE 3.5 open system interconnection (OSI) framework of International Organization for Standardization (ISO) standards for commu-nication between multi-vendor systems that organizes the communicati
