当大多数工程师们试图满足雷达或通信系统中的灵敏度技术时,常常受到相位噪声干扰。但是,现在增长的知识导致测试方法的改进,这种方法使得相位噪声较容易控制并减少测量的困难。信号源相位噪声在频率变换应用中要求严格,在这里信号电平所覆盖的动态范围宽;边带相位噪声可变成信息通带,限制了系统的总灵敏度。为解决此问题,可采用理想频谱分析仪以显示相位噪声。在这里用“理想”这个词,强调分析仪本身无边带噪声(图1)。使用这种分析仪可看到两种起伏相位:乱真 When most engineers try to meet the sensitivity techniques in radar or communications systems, they often suffer from phase noise. However, the growing knowledge has led to improvements in test methods that make phase noise easier to control and reduce the difficulty of measurement. Source phase noise is critical in frequency conversion applications, where the signal level covers a wide dynamic range; sideband phase noise can become information-passband, limiting the overall sensitivity of the system. To solve this problem, an ideal spectrum analyzer can be used to show the phase noise. Here use the word “ideal”, emphasizing the analyzer itself without sideband noise (Figure 1). Use this analyzer can see two kinds of ups and downs phase: random