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在PSM发射机的运行维护中,调制级对于整机来说,是主整电压和音频调制的核心控制区,它工作于低电压状态因而相对稳定。
In the operation and maintenance of PSM transmitters, the modulation level is the core control region of the main voltage and audio modulation for the whole machine. It operates in a low voltage state and thus is relatively stable.