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用于用户无线电的PLI一基本的频率综合器已变为相当普通的了。在这论文中将叙述采用频率锁定原理的另一种方法。 这方法像实质上的独立变量那样给于稳定性,锁定时间和噪音性能(回路滤波器参数,在程序控制下合适地达到调谐操作过程的最佳化),不要求可变模数分频器。 图1表示系统的方框图。所希望的频率靠微型计算机控制器进入一个计数器/综合器。微型计算机控制器从键盘(为了直接的频率入口,存储电台的扫描或检索率来自于不挥发存储器)和从数字调谐旋扫接受调谐输入。
PLI for user radio A basic frequency synthesizer has become quite common. In this paper, we will describe another method that uses the principle of frequency locking. This method gives stability, lock-in time and noise performance (loop filter parameters, optimally tuned operation procedures under program control), as essentially independent variables, without requiring a variable modulus divider . Figure 1 shows a block diagram of the system. The desired frequency depends on the microcomputer controller into a counter / synthesizer. The microcomputer controller accepts the tuning input from the keyboard (for direct frequency entry, storage scan or retrieval from non-volatile memory) and from digital tuning.