04:- By using Armstrong method design Wide Band FM with carrier frequency 90 MHz and frequency deviation equal 14.4KHz from narrow band FM with carrier frequency 150KHz and frequency deviation to 25Hz. Only two triple frequency multiplier and any number of double frequency multiplier are used (the carrier frequency after frequency convertor does not exceed 10MHz). ( 12 Marks) 25 :: The input signal v(t) is ( 12 Marks) 2V (1) 4V cos 26 cos 4 + cos t + T 1 X 3 3 X5 5 X 7 :) TT s(t) = cos 2 * T * 4wt if w=50Hz S(t) USSB V(t) -filter VCO Kf=250 Non-linear device 2X2+(X2) output signal cos2 * 7 * 300t cos2 *11*300 * 106t a) Find type and specification of filter. b) Find expression of output signal, bandwidth for each output block. c) what type of modulation for each output block. d) Sketch the spectrum of the output signal. e) Drive equation of demodulation of USSB. f) Plot the block diagram for demodulation output signal . 04:- By using Armstrong method design Wide Band FM with carrier frequency 90 MHz and frequency deviation equal 14.4KHz from narrow band FM with carrier frequency 150KHz and frequency deviation to 25Hz. Only two triple frequency multiplier and any number of double frequency multiplier are used (the carrier frequency after frequency convertor does not exceed 10MHz). ( 12 Marks) 25 :: The input signal v(t) is ( 12 Marks) 2V (1) 4V cos 26 cos 4 + cos t + T 1 X 3 3 X5 5 X 7 :) TT s(t) = cos 2 * T * 4wt if w=50Hz S(t) USSB V(t) -filter VCO Kf=250 Non-linear device 2X2+(X2) output signal cos2 * 7 * 300t cos2 *11*300 * 106t a) Find type and specification of filter. b) Find expression of output signal, bandwidth for each output block. c) what type of modulation for each output block. d) Sketch the spectrum of the output signal. e) Drive equation of demodulation of USSB. f) Plot the block diagram for demodulation output signal