标准摘要
[中文适用范围]: IEC 60728的本部分规定了用于电视信号、声音信号和交互服务的有线网络有源宽带设备的测量方法、性能要求和数据发布要求。本标准·适用于有线网络中使用的所有宽带放大器; · 覆盖频率范围 5 MHz 至 3 000 MHz;注: 3 000 MHz 的上限只是一个示例,并非严格值。应公布指定设备的一个或多个频率范围。 · 适用于单向和双向设备; · 规定了测量现用设备运行特性的基本方法,以评估该设备的性能; · 确定制造商要发布的性能规格; · 规定某些参数的最低性能要求。放大器分为以下两个质量等级: 1 级:通常用于级联的放大器; 2 级:通常在公寓楼或单个住宅内使用的放大器,为几个插座供电。实践经验表明,这些类型满足向用户提供最低信号质量所需的大部分技术要求。此分类不是必需的,而是向用户和制造商提供有关安装不同规模网络所需材料的最低质量标准的信息。系统运营商必须选择适当的材料,以满足用户插座的最低信号质量,并优化成本/性能,同时考虑网络规模和当地情况。所有要求和公布的数据均被理解为在指定频率范围内和良好匹配条件下的保证值。 [外文原描述]: IEC 60728-3:2010 lays down the measuring methods, performance requirements and data publication requirements for active wideband equipment of cable networks for television signals, sound signals and interactive services. This fourth edition cancels and replaces the third edition published in 2005 of which it constitutes a technical revision. It includes the following significant technical changes with respect to the previous edition: - extension of upper frequency range limit for cable network equipment from 862 MHz to 1 000 MHz; - method of measurement and requirements for immunity to surge voltages; - extension of scope to equipment using symmetrical ports; - additional normative references; - additional terms and definitions and abbreviations. The French version of this standard has not been voted upon.
英文名称Cable networks for television signals, sound signals and interactive services - Part 3: Active wideband equipment for cable networks