20.08.2015   WAS INTENTIONALLY LEFT BLANK

PROBABILITY OF FALSE TRIP FROM THE PERIOD INDICATION

The false trip raLe is obtained from Equation (2-22), rewritten for the conditions at the output of the period meter. The average number of times per second that the signal crosses a voltage (with positive slope) corresponding to a period PT is given by

Подпись:(2-34)

where P is the average period being presented at the time considered, f. is the frequency of the

D 2

upper half-power point of the power spectral density of the signal (Equation (2-32)), and Up is the variance (Equation (2-33)). .