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