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