Q1. Explain need of modulation.

This is question 1 (4 marks) from the GTU Electronic and Communication BE Summer 2019 question paper. Subject code: 2151004.

Q2. What is the difference between SSB and VSB wave?

This is question 2 (3 marks) from the GTU Electronic and Communication BE Summer 2019 question paper. Subject code: 2151004.

Electronic and Communication | B.E. Semester V Summer 2019 | GTU Papers

Q: Q1. Explain how bandwidth of a signal (information) affects its transmission.

This is question 1 (3 marks) from the GTU Electronic and Communication BE Summer 2019 question paper. Subject code: 2151004.

Q: Q1. Explain Automatic Gain Control (AGC) and discuss difference between AGC and Delayed AGC.

This is question 1 (7 marks) from the GTU Electronic and Communication BE Summer 2019 question paper. Subject code: 2151004.

Q: Q2. The frequency span to be received by a receiver is from 525KHz to 1650KHz. If Cof tuning circuit is limited to 50pF by a trimmer of min 25pF, calculate the value of padder capacitor, if the maximum value of variable capacitor is 450pF. The If is 465KHz.

This is question 2 (7 marks) from the GTU Electronic and Communication BE Summer 2019 question paper. Subject code: 2151004.

Q: Q2. Compare : Frequency modulation and Amplitude Modulation

This is question 2 (4 marks) from the GTU Electronic and Communication BE Summer 2019 question paper. Subject code: 2151004.

Q: Q2. A FM voltage is represented by e =12sin(6 x 10^8t + 5cos 1250t) Find FM Carrier Frequency, Modulating Frequency, Modulation Index, Maximum Deviation, Power dissipation across 10ῼ.

This is question 2 (7 marks) from the GTU Electronic and Communication BE Summer 2019 question paper. Subject code: 2151004.

Q: Q3. Explain the Armstrong method of Frequency modulated signal generation.

This is question 3 (7 marks) from the GTU Electronic and Communication BE Summer 2019 question paper. Subject code: 2151004.

Q: Q3. Two resistors 10 KΩ and 25 KΩ are at room temperature (300K) for a bandwidth of 150KHz. Calculate thermal noise, if two resistors are in series and if two resistors are in parallel.

This is question 3 (3 marks) from the GTU Electronic and Communication BE Summer 2019 question paper. Subject code: 2151004.

Q: Q3. Explain the interferences in angle modulated systems.

This is question 3 (4 marks) from the GTU Electronic and Communication BE Summer 2019 question paper. Subject code: 2151004.

Questions25

Explain need of modulation.

[4 marks]

Explain how bandwidth of a signal (information) affects its transmission.

[3 marks]

Explain Automatic Gain Control (AGC) and discuss difference between AGC and Delayed AGC.

[7 marks]

The frequency span to be received by a receiver is from 525KHz to 1650KHz. If Cof tuning circuit is limited to 50pF by a trimmer of min 25pF, calculate the value of padder capacitor, if the maximum value of variable capacitor is 450pF. The If is 465KHz.

[7 marks]

Compare : Frequency modulation and Amplitude Modulation

[4 marks]

A FM voltage is represented by e =12sin(6 x 10^8t + 5cos 1250t) Find FM Carrier Frequency, Modulating Frequency, Modulation Index, Maximum Deviation, Power dissipation across 10ῼ.

[7 marks]

What is the difference between SSB and VSB wave?

[3 marks]

Explain the Armstrong method of Frequency modulated signal generation.

[7 marks]

Two resistors 10 KΩ and 25 KΩ are at room temperature (300K) for a bandwidth of 150KHz. Calculate thermal noise, if two resistors are in series and if two resistors are in parallel.

[3 marks]

Explain the interferences in angle modulated systems.

[4 marks]

Explain basic principal of dual slope detector type FM demodulators.

[7 marks]

Define : 1) Signal to noise ratio 2) Image Frequency Rejection Ratio 3) Phase modulation

[3 marks]

An amplifier with 10dB noise figure and 4dB power gain is cascaded with a second amplifier which has a 10dB power gain. What is the overall noise figure?

[4 marks]

Explain reason and remedy for Diagonal clipping and Negative peak clipping.

[4 marks]

For superheterodyne receiver, Define : Sensitivity , Selectivity and Image frequency

[3 marks]

What is bandwidth efficient AM? Explain Phase shift method to generate a bandwidth efficient AM signals.

[7 marks]

Describe the problems in TRF receiver.

[3 marks]

Explain the working of superheterodyne receiver with help of block diagram.

[4 marks]

Derive the mathematical expression of Amplitude Modulated signal and identify the spectrum of AM wave.1

[7 marks]

Explain the importance of HAM radio during natural calamities.

[4 marks]

Define : signal energy and signal power

[3 marks]

Explain technology used in amateur radio.

[4 marks]

Derive equation for resonant frequency and Qfactor for parallel tuned circuit.

[7 marks]

Explain Skin effect.

[3 marks]

State and prove time scaling property of Fourier transform. Explain the effect of time scaling on bandwidth of the signal.

[7 marks]

Electronic and Communication — Summer 2019

Questions25