Modulation Theory is employed to analyze the side phase noise generated from radio-pulse signal influenced by incidental phase modulation. In addition to the measurement theory and practical application technique of phase noise, the concept and measurement method of transmitter phase noise are introduced. 应用调制理论分析了射频脉冲信号受寄生调制的影响而产生的边带相位噪声,提供了相位噪声测量的理论和实际应用技术,介绍了测量发射机相位噪声的概念和方法。