利用电力系统三相交流电压过零点和高速数字频率合成器解决了跳频系统中同步和快速频率合成的两个关键问题。

The zero-crossings of the AC voltage and digital frequency synthesizer are used in solving the two main problems in frequency hopping system-synchronization and fast frequency synthesizing.

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系统地研究了快速跳频PLL中杂散来源，给出了环路杂散模型，定义了杂散抑制比。

The sources and effects of spurs in a rapid frequency-hopped PLL are investigated, a model for analyzing spur effect is developed, and the spur suppression ratio is defined.

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