Elements of a communication system, modulation (AM), bandwidth, propagation of EM waves.
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Q1 · Communication Systems · EASY
In a communication system, which component converts the original message signal into a form suitable for transmission over a communication channel?
Q2 · Communication Systems · MEDIUM
An amplitude modulated (AM) wave has a carrier frequency of 1000 kHz and the modulating signal frequency is 5 kHz. What are the frequencies of the upper and lower sidebands?
Q3 · Communication Systems · MEDIUM
For an amplitude modulated wave with carrier frequency 1 MHz and modulating signal frequency ranging from 300 Hz to 3 kHz (audio range), what is the bandwidth required for transmission?
Q4 · Communication Systems · HARD
A carrier wave of frequency 1.5 MHz and amplitude 50 V is modulated by a sinusoidal signal of frequency 10 kHz producing 50% modulation. What is the amplitude of each sideband in the modulated wave?
Q5 · Communication Systems · MEDIUM
The frequency range suitable for ground wave propagation in long-distance communication is approximately: