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