標準號：IEC 60728-5-2007
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5部分:數據轉發器設備
英文標準名稱：Cabled networks for television signals, sound signals and interactive services - Part 5: Headend equipment
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
引用標準：IEC 60068;IEC 60130-9;IEC 60244-5;IEC 60417;IEC 60529;IEC 60617;IEC 60728-1;IEC 60728-2;IEC 60728-3;IEC 60728-11;IEC 61319-1;ISO/IEC 13818-1;ISO/IEC 13818-2;ISO/IEC 13818-3;ISO/IEC 13818-4;ITU-R Recommendation BS.468-4;ITU-R Report BT.624-4;ITU-T Recommen
適用范圍：This part of IEC 60728 defines the characteristics of equipment used in the headends ofterrestrial broadcast and satellite receiving systems (without satellite outdoor units andwithout those broadband amplifiers in the headend as described in IEC 60728-3). The satelliteoutdoor units for FSS are described in ETSI ETS 300 158, for BSS in ETSI ETS 300 249. Testmethods for both types (FSS and BSS) of satellite outdoor units are laid down inETSI ETS 300 457.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 (Q-grades).This standard defines the overall characteristics for upstream/downstream signals betweenexternal sources/sinks (for example, antennas, cable modem termination systems, etc.) andthe system interface to the cable network. In the case of modular headend systems, alsosingle equipment as modulators, converters, etc. are described. Cable modem terminationsystems, encrypters, decrypters, etc. are not described in this standard. If such equipment isused in headends, the relevant parameters for RF, video, audio and data interfaces should bemet.According to the definitions in 3.1, the headends are divided into the following three qualitygrades:? Grade 1: central headend;? Grade 2: hub headend or hubsite;? Grade 3: MATV headend/individual reception headend.