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要想使商用的或已经生产的频率合成器在特定范围内增加信道容量,需要进行大量的修改,这是设计师最讨厌的事情。但是,仅增加一个记数器和几个门电路就能使合成器的信道数增大5～10倍——几乎不变更基本电路。增大信道数的技术可用典型的调频合成
The most annoying thing designers have to do is to make a large amount of modifications to a commercially available or already-produced frequency synthesizer to increase channel capacity over a specified range. However, adding only one counter and several gates increases the synthesizer's channel count by a factor of 5 - almost no changes to the basic circuitry. The technique of increasing the number of channels can use typical FM synthesis