Solve any one question fromQ.1(a,b) and Q.2(a,b)

1(a)
State and compare different SSB generation methods.

6 M

1(b)
An angle modulated signal is described by the equation: \(\psi EM^{(t)}=10\cos \left ( 2\pi f_ct +4\sin 2\pi f_mt\right ) \)/

i) Determine the Modulation Index. Estimate the transmitted signal bandwidth.

ii) Repeat (i) f

i) Determine the Modulation Index. Estimate the transmitted signal bandwidth.

ii) Repeat (i) f

_{m}is doubled.
6 M

2(a)
With the help of spectrum and block diagram explain VSB modulation. What is its application?

6 M

2(b)
Derive an expression for frequency and phase modulated wave. Sketch their waveforms for a sinusoidal input.

6 M

Solve any one question fromQ.3(a,b) and Q.4(a,b)

3(a)
Explain distortions present in simple diode detector.

6 M

3(b)
State various sources of noise with examples. Explain the following types of noise in detail (any two):

i) Thermal noise

ii) Low frequency noise

iii) Shot noise.

i) Thermal noise

ii) Low frequency noise

iii) Shot noise.

6 M

4(a)
Explain performance characteristics of radio receiver with suitable graphs.

6 M

4(b)
Consider a receiving system consisting of an RF amplifier with noise figure of F1 = 2dB and a again a 9 dB followed by a mixer with a noise figure of F2 = 9 dB and a conversion gain of 15 dB.Calculate overall noise figure and noise temperature.

6 M

Solve any one question fromQ.5(a,b) and Q.6(a,b)

5(a)
Describe threshold in angle modulation.

7 M

5(b)
Explain the performance of DSBSC in presence of noise.

6 M

6(a)
Explain the perfromance of AM in presence of noise.

7 M

6(b)
Explain pre-emphasis and de -emphasis in FM.

6 M

Solve any one question fromQ.7(a,b) and Q.8(a,b)

7(a)
Explain aliasing and different ways to avoid aliasing.

7 M

7(b)
With the help of block diagram explain transmitter and receiver for Pulse code modulation.

6 M

8(a)
Explain types of sampling with waveform. Which type is used for practical application?

7 M

8(b)
With the help of neat diagram explain PWM.

6 M

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