IEC 60728-7-1:2003/AMD1:2015 标准是一项关于混合光纤同轴电缆外部网络状态监测的物理层规范。该标准适用于电视信号、声音信号和交互服务的有线电视网络。该标准规定了混合光纤同轴电缆外部网络状态监测的物理层规范，包括监测信号的频率范围、功率级别、调制方式、调制误差等。

该标准的主要内容包括以下几个方面：

1.监测信号的频率范围：该标准规定了监测信号的频率范围为5 MHz至1000 MHz。

2.监测信号的功率级别：该标准规定了监测信号的功率级别为-30 dBm至+30 dBm。

3.监测信号的调制方式：该标准规定了监测信号的调制方式为QPSK、16QAM、32QAM、64QAM、128QAM和256QAM。

4.监测信号的调制误差：该标准规定了监测信号的调制误差为±1 dB。

5.监测信号的传输速率：该标准规定了监测信号的传输速率为5 Mbps至1000 Mbps。

该标准的实施可以有效地监测混合光纤同轴电缆外部网络的状态，提高网络的可靠性和稳定性，保证用户的服务质量。

相关标准
IEC 60728-1:2014 Cable networks for television signals, sound signals and interactive services - Part 1: General requirements
IEC 60728-2:2012 Cable networks for television signals, sound signals and interactive services - Part 2: Electromagnetic compatibility for equipment
IEC 60728-3:2013 Cable networks for television signals, sound signals and interactive services - Part 3: Active wideband equipment for cable networks (TA)
IEC 60728-4:2013 Cable networks for television signals, sound signals and interactive services - Part 4: Passive wideband equipment for coaxial cable networks (TA)
IEC 60728-5:2015 Cable networks for television signals, sound signals and interactive services - Part 5: Selection of RF power amplifiers