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