A method 6 or 7 wherein said {TAIL ~ data acquisition routine} is called at {HEAD ~ intervals} by a hardware generated clock interrupt 
A method 6 or 7 wherein said { TAIL ~ data acquisition routine } is called at { HEAD ~ intervals } by a hardware generated clock interrupt
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH