Communication Systems In case of low level amplitude modulation system, the amplifiers following the modulated stage must be Non-linear devices Harmonic devices Class C amplifiers Linear devices Non-linear devices Harmonic devices Class C amplifiers Linear devices ANSWER DOWNLOAD EXAMIANS APP
Communication Systems It is found that a ship to ship communication suffers from fading. This can be avoided by using Broad band antenna Directional antenna Frequency diversity Space diversity Broad band antenna Directional antenna Frequency diversity Space diversity ANSWER DOWNLOAD EXAMIANS APP
Communication Systems What is the purpose of peak clipper circuits in radio transmitters? To reduce bandwidth To increase bandwidth To prevent overmodulation To regulate oscillator I/P voltage To reduce bandwidth To increase bandwidth To prevent overmodulation To regulate oscillator I/P voltage ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In case of frequency modulation, modulating voltage remains constant if the modulating frequency is lowered, then Amplitude of distant sidebands increases Amplitude of distant sidebands remains constant Amplitude of distant sidebands decreases Amplitude of distant sidebands first increases, then decreases Amplitude of distant sidebands increases Amplitude of distant sidebands remains constant Amplitude of distant sidebands decreases Amplitude of distant sidebands first increases, then decreases ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Which one of the following is analog? Delta modulation Differential PCM PCM PWM Delta modulation Differential PCM PCM PWM ANSWER DOWNLOAD EXAMIANS APP
Communication Systems If output power of a radio receiver is doubled, its volume is increased by __________ dB. 3 2 -3 1 3 2 -3 1 ANSWER DOWNLOAD EXAMIANS APP
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