means for separating {TAIL ~ the DC power} and {HEAD ~ the control signals} from the RF video signals 
means for separating { TAIL ~ the DC power } and { HEAD ~ the control signals } from the RF video signals
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH