... +12VDCGroundOptical power detect: the voltage equal to optical receive diodes electricity multiple 1KΩ resistance. the pin can detect RF output level, (optical input ... 1 dB, then RF level reduce2dB).CATV signal connect, the pin can through a 3-5V CMOS logical signal level, or connect ... 10KΩ pull up resistance to 4.5V, active RF output. CATV signal turn off, the ...