{HEAD ~ The system}, according to the invention, positively employs {TAIL ~ a narrow portion} of the width of the lock frequency range of the phase locked loop 
positively employs
{ HEAD ~ The system } , according to the invention , positively employs { TAIL ~ a narrow portion } of the width of the lock frequency range of the phase locked loop
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH