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