{TAIL ~ The analog portion} of {HEAD ~ the transmit path} is coupled to a calibrator which measures the corresponding analog response 
{ TAIL ~ The analog portion } of { HEAD ~ the transmit path } is coupled to a calibrator which measures the corresponding analog response
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH