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Electronics and Communication Communication Systems Difficulty: Medium

In a typical mobile satellite array antenna if three elements are activated, how many elements are deactivated? If the variance $$\sigma _x^2$$ of d(n) = x(n) - x(n - 1) is one-tenth the variance $$\sigma _x^2$$ of a stationary zero-mean discrete-time signal x(n), then the normalized autocorrelation function $$\frac{{{R_{xx}}\left( K \right)}}{{\sigma _x^2}}$$ at K = 1 is A unit impulse function δ(t) is defined by 1. δ(t) = 0 for all t except t = 0 2. $$\int_{ - \infty }^\infty {\delta \left( t \right)dt = 1} $$ The Fourier transform F(ω) of δ(t) is Electrolytic Capacitors are generally made of The efficiency of a Class - B amplifier for a supply of V CC = 24 V and peak output voltages V L (P) = 22 V is