{HEAD ~ a radio transmitter} that transmits {TAIL ~ the transmitter signal} from a transmission path into the transmission channel 
{ HEAD ~ a radio transmitter } that transmits { TAIL ~ the transmitter signal } from a transmission path into the transmission channel
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH