The measure sub-element , the phase-comparator , and the power level are introduced.
对检测环节、鉴相器、功率级做了介绍；
Integrated circuit that contains power functions. Often the power level is defined arbitrarily.
具有功率功能的集成电路，功率电平是随意定义的。
More particularly, the number of sustain pulses within the video frame and selected by the power level mode is modified as a function of the input frame frequency.
更具体地，按照输入帧频率的函数来修改视频帧内的维持脉冲数。
More particularly, the number of sustain pulses within the video frame and selected by the power level mode is modified as a function of the input frame frequency.
更具体地，按照输入帧频率的函数来修改视频帧内的维持脉冲数。
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