The excursion signal generator identifies a peak portion of {TAIL ~ a signal} exceeding a threshold, such as {HEAD ~ a magnitude threshold} 
The excursion signal generator identifies a peak portion of { TAIL ~ a signal } exceeding a threshold , such as { HEAD ~ a magnitude threshold }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD