A transceiver within the communication device sweeps through a frequency range of {TAIL ~ interest} in order to receive signals within {HEAD ~ the frequency range} 
A transceiver within the communication device sweeps through a frequency range of { TAIL ~ interest } in order to receive signals within { HEAD ~ the frequency range }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD