During coarse tuning, a reference signal used to control {HEAD ~ an output frequency} of {TAIL ~ the PLL} is provided to the coarse tuning circuitry and is divided by a factor M to provide a divided reference signal 
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During coarse tuning , a reference signal used to control { HEAD ~ an output frequency } of { TAIL ~ the PLL } is provided to the coarse tuning circuitry and is divided by a factor M to provide a divided reference signal
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH