The excursion signal generator identifies {HEAD ~ a peak portion} of {TAIL ~ a signal} that exceeds a threshold and generates a corresponding excursion signal 
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The excursion signal generator identifies { HEAD ~ a peak portion } of { TAIL ~ a signal } that exceeds a threshold and generates a corresponding excursion signal
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH