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Frequency Synthesizer (FS) is a very important block, which is used in a wireless transceiver as a local oscillator for frequency translation and channel selection.
频率合成器是射频收发机中非常重要的模块，是用于频率转换和频道选择的本地振荡源。
A frequency translation circuit (172-188) abuts the multiple channel bandpass filtered analogue signals in the frequency domain without any guard bands between adjacent channel signals.
频率平移电路(172 ~ 188)使得经过带通滤波的若干多通道模拟信号在频域中接邻，而在相邻通道信号之间没有任何保护频带。
If there is more than one possible translation, the words appears in ranked order of frequency.
如果有多于一个可能的翻译，换言之出现在排名顺序的频率。
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