本文介绍用微处理机对传送数据的电话网、微波电路以及长途电信网进行群时延(射频)测量的方法、实验及理论依据。并对使用微处理机程控测量与实验模型方法进行了比较。使用微处理机的结果不仅可靠而价廉,且是一种精密的群时延量计。 This paper introduces the method, experiment and theoretical basis of the group delay (radio frequency) measurement of the telephone network, microwave circuit and long-distance telecommunication network which transmit data by microprocessor. The method of using programmed measurement and experimental model of microprocessor was compared. The result of using a microprocessor is not only reliable and inexpensive, but also a sophisticated group delay meter.