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