本程序规定了有源电缆通信设备噪声功率比（NPR）的测量方法。它用于测量具有“F”型或5/8-24 KS连接器的75欧姆设备。有关正确测试技术的讨论，请参见SCTE 96 2008《有线电信测试指南》。 本程序使用频谱分析仪测量窄带内的噪声功率。可以使用其他测量方法，如窄带滤波器和功率计，只要结果与该方法相关。

This procedure defines a method of measurement for Noise Power Ratio (NPR) of active Cable Telecommunications equipment. It is intended for measurement of 75-ohm devices having type "F" or 5/8-24 KS connectors. See SCTE 96 2008 Cable Telecommunications Testing Guidelines for a discussion of proper testing techniques. This procedure uses a spectrum analyzer to measure the noise power in a narrow frequency band. Other means of measurement such as a narrow band filter followed by a power meter may be used as long as the results can be shown to correlate to this method.