At {TAIL ~ each sample time}, {HEAD ~ the accumulators} 1175, 1176, 1177 and 1178 add the input to a running correlation total 
At
At { TAIL ~ each sample time } , { HEAD ~ the accumulators } 1175 , 1176 , 1177 and 1178 add the input to a running correlation total
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH