determining {TAIL ~ an instantaneous time difference} between a fixed number of sample clock transitions at {HEAD ~ a transition} of the sample clock, the instantaneous time difference being based upon a time clock having a fixed time clock period, and 
determining { TAIL ~ an instantaneous time difference } between a fixed number of sample clock transitions at { HEAD ~ a transition } of the sample clock , the instantaneous time difference being based upon a time clock having a fixed time clock period , and
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH