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