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