求翻译：这时就须要按下+48V幻象电源开关给会议话筒供上工作电压，一人到话筒前说话使之有音频输出信号，操作人员按下调音台上本通道的PFL（预听）按钮，慢慢向左旋动调音台上本通道的INPUT SENS（增益）旋钮，同时看着PFL的电平显示表使音频信号闪动在0db位置就好，用监听耳机听下放出的人声音色如何，如感觉不行就按下本通道的EQ（均衡）按钮接通四段频率滤波器，调节声音的高中低音频特性，使之满足须听的要求。是什么意思？

Then you have to press the +48 V phantom power switch for the microphone to the meeting on the operating voltage, one to the microphone to speak so the audio output signal, the operator pressed the mixer channel PFL (pre-listen) button, and slowly move to the left channel of the mixer INPUT SENS (ga

正在翻译，请等待...

By now had to have to press down the +48V ghost power switch to supply the working voltage for the conference microphone, spoke a person to the microphone in front of enable it to have the audio frequency output signal, the operator presses down on the sound console this channel PFL (pre-fade listen

Then on need to by Xia +48V illusion power switch to meeting microphone for Shang work voltage, a people to microphone Qian talk makes of has audio output signal, operation personnel by cut tone stage this channel of PFL (pre-listening to) button, slowly left Rotary dynamic tuning stage this channel

Then on need to by Xia +48V illusion power switch to meeting microphone for Shang work voltage, a people to microphone Qian talk makes of has audio output signal, operation personnel by cut tone stage this channel of PFL (pre-listening to) button, slowly left Rotary dynamic tuning stage this channel