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描述了射频仿真系统中使用的目标回波距离处理器。它可从主控计算机接收目标与导弹之间的距离信息，根据射频信号的运动距离和时间之间的对应关系，用延迟时间来仿真目标与导弹之间的距离。文中通过软件置初值、硬件计数相结合的方法实现的延时电路，既具有高的时间分辨率，又可灵活地改变延时时间的大小。此外，本目标回波距离处理器还可以仿真距离变化速率，调节回波脉冲的宽度。
Describes the target echo distance processor used in the radio frequency simulation system. It can receive the distance information between the target and the missile from the host computer, and use the delay time to simulate the distance between the target and the missile according to the correspondence between the movement distance and the time of the radio frequency signal. In this paper, the delay circuit realized by the combination of the initial value of the software and the hardware counting method not only has high time resolution, but also can flexibly change the delay time. In addition, the target echo distance processor can also simulate the rate of change of the distance and adjust the width of the echo pulse.