电视信号 声音信号和交互服务的有线网络 第12部分：系统的电磁兼容性（2.0 版）

[中文适用范围]： IEC 60728的本部分适用于电视信号@声音信号和交互服务的有线网络的辐射特性和抗电磁干扰能力，覆盖频率范围0@15 MHz至3@5 GHz。注 1：低于 30 MHz 的测量通常被认为在有线网络环境中没有用，并且在实践中很难执行。本文件规定了工作条件下（现场）的测量方法和 EMC 性能要求，以确保电缆网络持续的 EMC 完整性。本文件不包括超出系统出口（例如，最简单的接收器引线）、始于系统出口并结束于用户终端设备输入端的电缆网络。 IEC 60966-2-4、IEC 60966-2-5 和 IEC 60966-2-6 中规定了接收器引线的电磁兼容性要求。有线网络和广泛的无线电服务必须共存。其中包括@紧急服务@生命安全@广播@航空@无线电导航服务以及陆地@移动@业余和蜂窝无线电服务。典型生命安全服务的频率范围列于附件 B。国家法规可能要求对某些服务提供额外保护。附录 A 提供了有关某些国家/地区法律要求的信息。 [外文原描述]： IEC 60728-12:2017(E) applies to the radiation characteristics and immunity to electromagnetic disturbance of cable networks for television signals, sound signals and interactive services and covers the frequency range 0,15 MHz to 3,5 GHz. This second edition cancels and replaces the first edition published in 2001. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) IEC 60728-12 with its methods of measurement and EMC performance requirements is explicitly dedicated to “under operating conditions (in situ)” to ensure the ongoing EMC integrity of cable networks. b) The first intermediate frequency range (1st IF range) for satellite signal transmission was extended to cover now frequencies from 950 MHz up to 3 500 MHz. c) The method of measurement and the requirements for in-band immunity were extended taking into account the new EMC environment due to the allocation of broadband wireless services in the frequency band 694 MHz to 862 MHz. As a consequence, the limits of in-band immunity were specified for analogue and additionally for digital signals in this frequency range. d) The substitution method of measurement (power method) was deleted. e) EMC measurements below 30 MHz were deleted. f) New Annex D “Measurements at other distances than the standard distance of 3 m”. g) New Annex E “GPS based leakage detection system for cable networks”.