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