... the same as VIDEO IN2.K1: Switching Key, to reset and scan sync signal.3. Installation1. Introduction of InterfaceUnderneath panel ... red Sync Signal, SOB blue Sync Signal)three signals, connect R,G,B these three BNC, one-one correspondence ... the signal source is RGBS(CS compound sync), connect H/CS,R,G,B these four BNC,one ... .When the signal source is RGBHV(separate sync)connect V,H,R,G,B these five BNC, ...