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