means for generating a synchronizing signal part having {HEAD ~ at least a predetermined first number} of {TAIL ~ bits} of a first binary level 
of
means for generating a synchronizing signal part having { HEAD ~ at least a predetermined first number } of { TAIL ~ bits } of a first binary level
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH