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本文所描述的鉴频器不同于目前生产的可调鉴频器,首先是因为它能同时解调频分多路系统中的所有副载波通道。此外,它以数字形式输出数据,以便直接与计算机输入口兼容。这种鉴频器的实现方法将以方框图的形式加以说明。对“有限脉冲响应”滤波器的内部带速补偿过程进行了重点讨论。
The frequency discriminator described in this article is different from the currently available adjustable frequency discriminators, first of all because it demodulates all the subcarrier channels in a frequency division multiple simultaneous system. In addition, it outputs data digitally to be directly compatible with the computer’s input port. The implementation of this frequency discriminator will be illustrated in the form of a block diagram. The internal speed compensation process of “finite impulse response” filter is emphatically discussed.