1、BRITISH STANDARD BS EN 60728-7-1:2005 Cable networks for television signals, sound signals and interactive services Part 7-1: Hybrid Fibre Coax Outside Plant Status Monitoring Physical (PHY) Layer Specification The European Standard EN 60728-7-1:2005 has the status of a British Standard ICS 35.100.1
2、0; 33.160; 33.040 BS EN 60728-7-1:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 16 March 2005 BSI 16 March 2005 ISBN 0 580 45598 X National foreword This British Standard is the official English language version of EN 60728-7-1:2005. I
3、t is identical with IEC 60728-7-1:2003. The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its se
4、cretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Cat
5、alogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand
6、 the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a f
7、ront cover, an inside front cover, the EN title page, pages 2 to 18, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 60728-7-1 NORME
8、EUROPENNE EUROPISCHE NORM February 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitatio
9、n 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 television signals, sound signals and interactive services Part 7-1: Hybrid Fibre Coax Outside Plant Status Monitoring Physical (PHY) L
10、ayer Specification (IEC 60728-7-1:2003) Rseaux de distribution par cbles pour signaux de tlvision, signaux de radiodiffusion sonore et services interactifs Partie 7-1: Surveillance de ltat des installations extrieures des rseaux hybrides fibre optique et cble coaxial - Spcification de la couche phys
11、ique (CEI 60728-7-1:2003) Kabelnetze fr Fernsehsignale, Tonsignale und interaktive Dienste Teil 7-1: Zustandsberwachung Hybrid- Faser-Koax-Netze (HFC) Festlegung Bitbertragungsschicht (PHY) (IEC 60728-7-1:2003) This European Standard was approved by CENELEC on 2004-12-01. CENELEC members are bound t
12、o comply with the CEN/CENELEC Internal Regulations which stipulate the conditions 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 Centr
13、al 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 responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official
14、 versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia,
15、Spain, Sweden, Switzerland and United Kingdom. Foreword The text of the International Standard IEC 60728-7-1:2003, 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 submit
16、ted 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: 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 da
17、te by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-12-01 _ Endorsement notice The text of the International Standard IEC 60728-7-1:2003 was approved by CENELEC as a European Standard without any modification. _ Page2 EN6072871:2005CONTENTS INTRODUCTION.4 1 Sco
18、pe.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 HMS specification documents8 4.2 Functional assumptions.9 5 Physical layer specification.9 5.1 Separate forward and return cha
19、nnels.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 operation.10 5.7 Forward and return channel specifications.10 5.8 Media access control layer interface17 5.9 RF cut-off17 Bibl
20、iography18 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 Table 3 Spectral limits by geographical area9 Table 4 HMS PHY channel RF and modulation specifications 11 Page3 EN6072871:2005 INTROD
21、UCTION Standards of the IEC 60728 series deal with cable networks for television signals, sound signals and interactive services including equipment, systems and installations for head-end reception, processing and distribution of television and sound signals and their associated data signals, and p
22、rocessing, interfacing and transmitting all kinds of signals for interactive services using all applicable transmission media. All kinds of networks like CATV-networks, MATV-networks and SMATV-networks, individual receiving networks and all kinds of equipment, systems and installations installed in
23、such networks, are within this scope. The extent of this standardization work is from the antennas, special signal source inputs to the head-end or other interface points to the network up to the system outlet or the terminal input, where no system outlet exists. The standardization of any user term
24、inals (i.e. tuners, receivers, decoders, multimedia terminals, etc.) as well as of any coaxial and optical cables and accessories therefore is excluded. Page4 EN6072871:2005CABLE NETWORKS FOR TELEVISION SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICES Part 7-1: Hybrid Fibre Coax Outside Plant status
25、monitoring Physical (PHY) layer specification 1 Scope This part of IEC 60728 specifies requirements for 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
26、 the SCTE. The purpose of the HMS specification is to support the design and implementation of interoperable 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-co
27、mpliant transponders interfacing to managed outside plant network elements (NE) and a centralized head-end 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
28、in the head-end. Any exceptions to compliance with this standard will be specifically noted herein as necessary. 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 wi
29、th local EMC regulatory requirements. Other than operating temperature, physical parameters such as shock, 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. Tabl
30、e 1 Transponder type classifications Type Description Application Type 0 Refers to legacy transponder equipment, 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
31、same management applications as the other types through proxies or other means at the head-end Type 1 Refers 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 mean
32、s. Type 1 is a standards-compliant transponder (either manufactured to the standard or upgraded) that connects 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
33、 electrical and physical specifications defined in the HMS standards. It can be factory or field-installed. 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 suppor
34、t the electrical specifications defined in the HMS standards. It may or may not support the physical specifications 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 Page5 EN6072871:20052 Normative reference
35、s 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 particular geographical area, and an
36、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 the usable return spectrum and the lower
37、 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 intercon
38、nection (OSI) framework of International Organization 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
39、uses the layer immediately below it and provides services 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)
40、 architecture; the layer that provides services to 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 upp
41、er edge that is typically in the range of 42 MHz to 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 parall
42、el analogue, parallel digital and serial ports Page6 EN6072871:20053.9 un-modulated carrier carrier resting on the mark frequency rather than on the channels centre frequency 3.10 Abbreviated terms ANSI American National Standards Institute BER Bit Error Rate C/R Carrier-to-Noise Ratio C/(N+I) Carri
43、er to Noise-plus-Interference Ratio CW Continuous Wave EMC Electromagnetic Compatibility FSK Frequency Shift Keying HE Head-end Element HFC Hybrid Fibre Coax HMS Hybrid Management Sub-Layer LSB Least Significant Bit MSB Most Significant Bit NE Network Element MAC Media Access Control OSP Outside Pla
44、nt PHY Physical RF Radio Frequency SCTE Society of Cable Telecommunications Engineers Page7 EN6072871:20054 HMS reference architecture forward and return channel specifications The reference architecture for the HMS series of specifications is illustrated in Figure 1. Status Monitoring Device Headen
45、d Status Monitoring Equipment RF RECEIVER RF TRANSMITER RF TRANSMITER RF RECEIVER RF Splitter RF Combiner Optical Receiver Laser Laser Optical Receiver RF Amplifier Chain Fiber Node Diplexer * * The diplexer filter may be included as part of the network element to which the transponder interfaces, o
46、r it may be added separately by the network operator. C B A IEC 2293/03Figure 1 HMS reference architecture diagram All quantities relating to forward channel transmission or reverse channel reception are measured at point A in Figure 1. All quantities relating to forward channel reception or reverse
47、 channel transmission are measured at point B for two-port devices and point C for single port devices as shown in Figure 1. 4.1 HMS specification documents A list of documents in the HMS specifications family is provided in Table 2. Table 2 HMS document family HMS notation Title SCTE HMS PHY HMS Ou
48、tside Plant Status Monitoring Physical (PHY) Layer Specification SCTE HMS MAC HMS Outside Plant Status Monitoring Media Access Control (MAC) Layer Specification SCTE HMS PSTIB HMS Outside Plant Status Monitoring Power Supply to Transponder Interface Bus (PSTIB) Specification SCTE HMS ALARMS MIB HMS
49、Alarms Management Information Base SCTE HMS COMMON MIB HMS Common Management Information Base SCTE HMS FIBERNODE MIB HMS Fiber Node Management Information Base SCTE HMS PROPERTY MIB HMS Alarm Property Management Information Base SCTE HMS PS MIB HMS Power Supply Management Information Base SCTE ROOT MIB SCTE Root Management Information Base SCTE HMS GEN MIB HMS Power Supply Generator Man
