The voltage controlled oscillator oscillates at a frequency equal to {TAIL ~ the center frequency} of the carrier of the input angle modulated wave, when {HEAD ~ the phase} locked loop becomes unlocked 
The voltage controlled oscillator oscillates at a frequency equal to { TAIL ~ the center frequency } of the carrier of the input angle modulated wave , when { HEAD ~ the phase } locked loop becomes unlocked
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH