{HEAD ~ A method} and apparatus for collecting digital sample data from a target system accesses the digital sample data at transitions of a sample clock, acquires {TAIL ~ information} related to an instantaneous average period of the sample clock, and records the digital sample data and the information related to the instantaneous average period of the sample clock 
acquires
{ HEAD ~ A method } and apparatus for collecting digital sample data from a target system accesses the digital sample data at transitions of a sample clock , acquires { TAIL ~ information } related to an instantaneous average period of the sample clock , and records the digital sample data and the information related to the instantaneous average period of the sample clock
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 REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH