3G、4G 功率校准时，power detector coupler loss校准的到底是什么？求大神答疑解惑！

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3G、4G 功率校准时，power detector coupler loss校准的到底是什么？求大神答疑解惑！

VGA DAC, PA high mode=296,198
VGA DAC, PA middle mode=238,198
VGA DAC, PA low mode=161,198

Tx compensation power detector coupler loss high=-23.5938
Tx compensation power detector coupler loss low=-23.1875
Tx compensation power detector coupler loss middle=-23.2812

Dedry

同求！！！！！！！！[em15]

dumber

类似PA gain 那个值 TRC会有一个接受到的目标值，当耦合功率过大 （输出功率大）会增大loss 绝对值，降低输出功率 ，都是一个欺骗TRC的过程

sunday618

dumber 发表于 2016-12-28 17:47
类似PA gain 那个值 TRC会有一个接受到的目标值，当耦合功率过大 （输出功率大）会增大loss 绝对值，降低输 ...

大神  你好 ！
关于MTK的  3G  4G的  POWER  DETECTOR  ，小弟有问题请教下：
1.INI文件里    LTE的TPC部分   有给出coupler loss值
  Tx compensation power detector coupler loss high=-24.65625
  Tx compensation power detector coupler loss low=-24.71875
  Tx compensation power detector coupler loss middle=-24.65625

也有各信道对应高，中，低增益模式下对应的补偿值
    Tx compensation power detector pa high temperature      1=0.062500,0.062500,0.031250,0.062500,0.093750,0.093750,0.062500,0.093750,0.156250,0.156250,0.125000,0.093750,0.093750,0.093750,0.093750,0.093750,0.093750,0.093750,0.093750,0.093750,0.093750


这两个在进入非信令模式后都有对应。



问题是：
进行非信令调试时，一般先选择中间信道，改变coupler loss值，达到期望功率，   其它信道，修改power detector 补偿值，使达到期望功率，看TX指标
1.这种方式实质改变的是收发器出来的功率，PA增益固定，进而改变PA的输出功率？
2.为什么不直接修改PA GAIN和PA  GAIN在各个信道的补偿值？