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