In {HEAD ~ yet a further window} or {TAIL ~ frame} 850, the reference template 810 is again illustrated, this time in overlapping relationship to a second paced signal 860 
In { HEAD ~ yet a further window } or { TAIL ~ frame } 850 , the reference template 810 is again illustrated , this time in overlapping relationship to a second paced signal 860
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH