The invention relates to {HEAD ~ a transceiver unit} for operation at {TAIL ~ a first and second transmitting/receiving frequency} 
The invention relates to { HEAD ~ a transceiver unit } for operation at { TAIL ~ a first and second transmitting / receiving frequency }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL