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