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过去,已探讨过25—54兆赫的调频发射机。发射机中晶体的基频振荡经过四分频而产生出一个较低的、而后被调制的频率。这个较低的被调制的频率经过24次倍频而产生出在所希望的频段中的输出频率。
In the past, 25-54 MHz FM transmitters have been explored. The fundamental frequency oscillations of the crystal in the transmitter are divided by four to produce a lower, and then modulated frequency. This lower modulated frequency produces 24 output frequencies in the desired frequency band after 24 times frequency doubling.