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有两块电路板LMH0346+LMH0302 输出SDI图像成功，但是LD在有无SDI信号输入时，始终是低电平，LED不亮，利用其他好的电路部分全部替换后，仍然是这一现象，请问是什么原因造成的这一现象? 是否与LF1与LF2之间56nF电容有关，
您好,
能否发一下您的原理图? 有可能的原因: BYPASS引脚置高时,会使得LOCK Detect引脚持续为低电平.
Note that when the Bypass/Auto Bypass input is set high, Lock Detect will remain low.
Kevin
有电路图吗？输入的SDI data rate没才超出LMH0346支持的范围吧？建议将rate[1:0配置为00.
