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