Electronic and Communication — Summer 2023

Find the Fourier transform of e-at u(t).

Draw the block diagram of basic communication system and explain it.

What is Q-Factor of a series resonance circuit? Explain the bandwidth of series resonance circuit and effect of Qon bandwidth.

Draw and explain waveform of the DSB-FC modulation.

Define and draw the unit gate function rect(x). Find the inverse Fourier transform of δ(ω – ω ).0

Obtain the time domain equation of AM wave. Discuss modulation index and bandwidth of AM wave.

Explain the Armstrong method of FM generation.

Explain the double-sided frequency spectrum of AM wave. If modulating signal frequency 15 kHz and carrier frequency is 2 MHz, determine USB and LSB frequency component.

Explain the phase shift method for SSB generation.

Explain the modulation index and frequency spectrum of FM wave.

Discuss the working of simple slope detector circuit for FM demodulation.

How PM signal can be generated using FM modulator? Compare the FM and PM system.

What is signal to noise ratio (SNR)? Explain the SNR of Tandem connection.

Draw and explain the block diagram of tuned radio frequency receiver. Discuss the disadvantages of this receiver.

What is intermediate frequency (IF) in receiver? Explain the following terms: Fidelity and Image Frequency.

What are the natural sources of noise? Explain thermal noise in brief.

What is ham radio? Explain the importance this technology during natural calamities.