Jitter is a type of {HEAD ~ timing error} between {TAIL ~ the expected or ideal timing} of a signal and the actual timing of a signal in which the characteristics of the timing error change with time 
between
Jitter is a type of { HEAD ~ timing error } between { TAIL ~ the expected or ideal timing } of a signal and the actual timing of a signal in which the characteristics of the timing error change with time
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL 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