{HEAD ~ The timing diagram} hypothetically shows {TAIL ~ a spectrum} divided equally among 13 channels on the horizontal axis and 97 time slots on the vertical axis 
hypothetically shows
{ HEAD ~ The timing diagram } hypothetically shows { TAIL ~ a spectrum } divided equally among 13 channels on the horizontal axis and 97 time slots on the vertical axis
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH