To further increase the fault tolerance, {HEAD ~ the sync mark detector} is enabled by timing {TAIL ~ recovery} relative to the end of the preamble field 
is enabled by timing
To further increase the fault tolerance , { HEAD ~ the sync mark detector } is enabled by timing { TAIL ~ recovery } relative to the end of the preamble field
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH