However, if, as a result of an increase or decrease in the load requirement of load 78, the frequency of {HEAD ~ the voltage} from {TAIL ~ frequency sensor} 80 differs from the reference frequency, an error voltage from summer 82 is provided 
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However , if , as a result of an increase or decrease in the load requirement of load 78 , the frequency of { HEAD ~ the voltage } from { TAIL ~ frequency sensor } 80 differs from the reference frequency , an error voltage from summer 82 is provided
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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