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