Electronic and Communication — Summer 2024

What is modulation and list out the need of modulation?

Explain the skin effect in brief.

Define communication. Draw The basic block diagram of communication system explain the function of each block.

Define Following Terms: 1. Phase Modulation 2.Modulation Index 3. Double spotting

State and prove time shifting property of Fourier transform

Explain Amplitude modulation with required waveforms. Also give mathematical representation of amplitude modulated wave.

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

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

Compare : Frequency modulation and Amplitude Modulation

Explain the indirect method of generating FM signal with neat block diagram and relevant mathematical expressions.

Explain pre-emphasis and de-emphasis in relation to FM.

Discuss block diagram of filter method for SSB-SC generation.

List out main functions of the communication radio receiver circuits. Also define the following terms related to radio receiver: (1) Selectivity (2) Fidelity (3) Sensitivity.

What is the difference between SSB and VSB wave?

State Parseval’s theorem.

Enlist at least four FM demodulator circuits. Also describe working of Foster-Seeley discriminator with required details.

Describe the significance of synchronous product detector in SSB demodulation process.

Explain the trapezoidal method for monitoring the A.Mwaveform using oscilloscope in detail.

Draw block diagram of Super-heterodyne receiver and explain the functionality of its each block with necessary details.

Derive the general Friis’s formula to define noise factor of cascaded amplifiers.

Explain Phased Look Loop with all necessary details.

List out different types of noise existing during the working of a1 communication system. Also briefly describe about shot noise, partition noise and flicker noise.

Explain self-capacitance of a coil.

Draw the block diagram of Tuned Radio Frequency (TRF) Receiver and explain its operation

Describe Ham radio concept with required details. Also describe the usage significance of Ham radio during the occurrence of natural calamines