标准摘要
[中文适用范围]： 本部分 IEC 60728 规定了用于电视信号、声音信号和交互服务的有线网络宽带设备的测量方法、性能要求和数据发布要求。 本文件 • 适用于所有有线网络中使用的宽带放大器； 注：3 000 MHz 的上限是一个示例，而非严格值。应公布设备指定的频率范围或范围。 • 适用于单向和双向设备； • 规定了有源设备操作特性的基本测量方法，以评估该设备的性能； • 确定了制造商应发布的性能规范； • 规定了某些参数的最低性能要求。 放大器分为以下两个质量等级： 等级1：通常用于级联的放大器； 等级2：通常用于公寓楼或单个住宅内，以供给几个出口的放大器。 实践经验表明，这些类型满足了向用户提供最低信号质量所需的大多数技术要求。此分类并非要求，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出口处的最低信号质量，并在考虑网络规模和本地情况的情况下优化成本/性能。 所有要求和发布的数据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 60728-3:2017 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60728-3:2017 specifies 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 fifth edition cancels and replaces the fourth edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) extension of upper frequency range limit for cable network equipment in the forward path from 1000 MHz to 1218 MHz (optional up to 1794 MHz); b) extension of upper frequency range limit for cable network equipment in the return path from 85 MHz to 204 MHz; c) integration and update of IEC 60728-3-1 content; d) integration and update of the Technical Specification CLC/TS 50083-3-3 content; e) deletion of specifications and test methods for obsolete analogue parameters; f) additional normative references; g) additional terms and definitions and abbreviations.
英文名称Cable networks for television signals, sound signals and interactive services - Part 3: Active wideband equipment for cable networks