標準號：IEC 60728-4-2007
中文標準名稱：電視信號、聲音信號和交互式服務用電纜網絡.第4部分:同軸電纜網絡用無源寬帶設備(TA 5)
英文標準名稱：Cable networks for television signals, sound signals and interactive services - Part 4: Passive wideband equipment for coaxial cable networks (TA 5)
標準類型：M60
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：M60
國際標準分類號：33.060.40;33.170
引用標準：IEC 60068;IEC 60417;IEC 60529;IEC 60617;IEC 60728;IEC 60966-1;IEC 60966-2-4;IEC 60966-2-5;IEC 60966-2-6;IEC 61000-4-5;IEC 61000-6-1;IEC 61169-1;IEC 61169-2;IEC 61169-24
適用范圍：This part of IEC 60728 applies to system outlets, splitters and taps, passive single or multipleport equipment comprising filters, attenuators, equalizers, galvanic isolators, power injectors,cable splices, terminating resistors and transfer points, but excluding coaxial cables andreceiver leads (see 5.2).This standard? covers the frequency range 5 MHz to 3 000 MHz;? identifies performance requirements for certain parameters;? lays down data publication requirements for certain parameters;? stipulates methods of measurements;? introduces minimum requirements defining quality grades.There are three grades for all passive equipment except system outlets where there is onlyone.Different networks require the same performance and, when integrating networks, upgradingwill be avoided.Practical experience has shown that these three grades meet most of the technicalrequirements necessary for supplying a minimum signal quality to the subscribers. Thisclassification should not be considered as a requirement but as information for users andmanufacturers on the minimum quality criteria of the material required to install networks ofdifferent sizes. The system operator should select appropriate material to meet the minimumsignal quality at the subscriber's outlet and to optimize cost/performance, taking into accountthe size of the network and local circumstances.All requirements and published data should be understood as guaranteed values within thespecified frequency range and in well-matched conditions.