{HEAD ~ The sync mark detector} correlates the detected bit sequence with a target sync mark and outputs {TAIL ~ a sync mark} detected signal when the sync mark is found 
{ HEAD ~ The sync mark detector } correlates the detected bit sequence with a target sync mark and outputs { TAIL ~ a sync mark } detected signal when the sync mark is found
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH