Timing recovery in the read channel synchronizes to a phase and frequency of the preamble field and {HEAD ~ a sync detector} detects {TAIL ~ the sync mark} in order to frame operation of an RLL decoder for decoding the detected data field 
Timing recovery in the read channel synchronizes to a phase and frequency of the preamble field and { HEAD ~ a sync detector } detects { TAIL ~ the sync mark } in order to frame operation of an RLL decoder for decoding the detected data field
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH