{TAIL ~ The transceiver device} is programmed to monitor {HEAD ~ the spectrum} to determine if a portion of the spectrum is available 
{ TAIL ~ The transceiver device } is programmed to monitor { HEAD ~ the spectrum } to determine if a portion of the spectrum is available
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH