为了使得射频源和波导管的频率保持一致，采用了自动频率控制系统(afc)。

In order to make the RF source and the waveguide have the same resonant frequency, the automatic frequency control (AFC) system is used.

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为了使得射频源和波导管的频率保持一致 ，采用了自动频率控制系统 （AFC）。

This paper introduces an AFC algorithm for a zero-intermediate frequency direct-sequence spread spectrum digital receiver.

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本文简述了西门子直线加速器自动频率控制系统(afc)的基本工作原理，并据此原理总结排除afc系统元器件故障的经验，优化afc系统的调整方法探索。

To explain the fundamental work principle of AFC for Siemens accelerator linear, summarize the experience which remove breakdown of AFC system element, optimize regulative method of AFC system.

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