By using one channel as {HEAD ~ a reference channel}, and synchronizing the other three channels thereto, it is possible to ensure {TAIL ~ that channel} to channel skew is constant 
By using one channel as { HEAD ~ a reference channel } , and synchronizing the other three channels thereto , it is possible to ensure { TAIL ~ that channel } to channel skew is constant
OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH