KERALA UNIVERSITY Class 4 analog communication Question Paper 2019

Practice authentic previous year questions for better exam preparation.

Sample Questions

An audio frequency signal $10 \sin 2 \pi^{\star} 500 t$ is used to amplitude modulate a carrier of $50 \sin 2 \pi * 10^{5} t$. Assume modulation index $=0.2$. Find (a) Sideband frequencies. (b) Amplitude of each sideband frequencies.
The total antenna current of an $A M$ transmitter is $5 A$. If the modulation index is 0.6 , calculate the antenna current when only the carrier is sent.
Draw time domain and frequency domain representations of a DSBSC wave.
Explain the significance of image frequency.
Calculate the carrier frequency and modulation index for an FM signal which reaches a maximum frequency of 99.047 MHz and a minimum frequency of 99.023 MHz . The frequency of the modulating signal is 7 KHz and frequency deviation is 12 KHz .