These two signals GH and GL are routed along with Data1 from counter 12 to a means, represented by {HEAD ~ block} 30, for interpreting the signals GH and {TAIL ~ GL} 
These two signals GH and GL are routed along with Data1 from counter 12 to a means , represented by { HEAD ~ block } 30 , for interpreting the signals GH and { TAIL ~ GL }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL