当信号从原中心频率偏移，信号越来越从设定的发射通道偏移，功率分析仪的功率电平会越来越低。
As the signal is shifted from the original center frequency, the RF power analyzer reads lower and lower power levels as more and more of the signal shifts out of the intended transmission channel.
利用可变频脉冲发生器、光电耦合器和F/V转换器组成输出通道，设定阀值；
The threshold voltage is set by output channel comprised of pulse generator, photoelectric coupler and F/V converter, and the detection result is input through photoelectric coupler.
电流在反馈电阻上产生的电压超出设定值时，IR 2132启动内部保护电路，关断输出通道，实现电流保护。
When the voltage on the feedback resistance over the designed value, the inside protection circuit was operated and the output channels were cut in IR2132 to achieve current protection.
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