In FIG 23, the ordinate indicates {HEAD ~ the signal amplitude} in arbitrary units, the abscissa indicates {TAIL ~ the time} in arbitrary units, and a solid line indicates an ideal waveform r 
In FIG 23 , the ordinate indicates { HEAD ~ the signal amplitude } in arbitrary units , the abscissa indicates { TAIL ~ the time } in arbitrary units , and a solid line indicates an ideal waveform r
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH