receiving {HEAD ~ a digital differential signal} having a first rate, the digital differential signal comprising a first component and {TAIL ~ a second component} 
receiving { HEAD ~ a digital differential signal } having a first rate , the digital differential signal comprising a first component and { TAIL ~ a second component }
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL