STUPIDSID
1(a)
A eandom variable has probability density function given by fx(x)=2e-2x for x≥0 find the probability that it will take a value between 1 and 3.
5 M
1(b)
Explain the mean, correlation and covariance functions.
9 M
1(c)
Explain the Gaussian process and also mention the properties of the Gaussian process.
6 M
2(a)
Explain the operation of the switching modulator with circuit diagram, and waveform.
7 M
2(b)
Explain the operation of the ring modulator with circuit diagram and relevant waveforms.
8 M
2(c)
With relevant diagram explain the operation of the coherent detection DSBSC modulated waves.
5 M
3(a)
With relevant diagram, explain the operation of the quadrature carrier multiplexing transmitter scheme and receiver scheme.
8 M
3(b)
Mention the advantage and disadvantages of the SSB system.
5 M
3(c)
With relevant diagram explaint the operation of the phase discrimination method for generating an SSB modulated wave.
7 M
4(a)
Explain the improtance of vestigial sideband modulation with the spectrum of the VSB modulated wave.
5 M
4(b)
With block diagram approach. Explain the operation of the frequency division multiplexing system.
8 M
4(c)
Explain the operation of the super heterodyne receiver with relevant block diagram.
7 M
5(a)
When a 50.4 Mhz carrier is frequency modulated by a sinusoidal AF modualting siganal. Highest frequency reached is 50.405MHz. Calculate: i) The freqency deviation produced .
ii) Carrier swing of the wave.
iii) Lowest frequency reached.
ii) Carrier swing of the wave.
iii) Lowest frequency reached.
5 M
5(b)
With block diagram approach explain the operation of the indirect frequency modulas using Armstrong method briefly.
9 M
5(c)
Explain the method of generating direct FM using suitable circuit. And also write relevant expressions.
6 M
6(a)
With circuit diagrm, explain the operation of the balanced slope detector. Plot the characteristics of the same.
7 M
6(b)
With relevant block diagram, Explain the operation of the FM stereo multiplexing system.
8 M
6(c)
Explain the linear model of phase locked loop with relevant expressions.
5 M
7(a)
Explain briefly on the following:i) Shot noise; ii) Thermal noise
6 M
7(b)
A receiver with a noise figure of 10dB is fed a low noise amplifier that has a gain of 60dB and a noise tempreature of 80K. Calculate the noise temperature of the receiver and overall noise temperature. Assume temperature 25°C.
6 M
7(c)
Explain the cascade connection of two port networks with block diagram and relevant expressions.
8 M
8(a)
With block diagram approach explain the noise in DSBSC receivers with model of DSBSC receiver using coherent detection.
6 M
8(b)
Find the figure of merit when the depth of modulation is i) 100% ii) 50% iii) 30%.
6 M
8(c)
Explain the pre-emphasis and De-emphasis in frequency modulation with circuits and graphs.
8 M
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