... ASI signal switcher has many functions, such as 2X2,manual,automatic smart switch,single channel PID,multichanel PID, as well analizing TS ... all wayIf the main channel signal is failure, it will switch to standby signal automaticallIf the main channel signal recovered normal ... return to it automaticallyThere is no black scence while it switch signal Practical Function Provide upt to 2 channel ASI ...