Communication Systems Leak type bias is used in plate modulated class C amplifier to Prevent excessive grid current Prevent over modulation Prevent tuned circuit damping Increase the bandwidth Prevent excessive grid current Prevent over modulation Prevent tuned circuit damping Increase the bandwidth 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 remains constant Amplitude of distant sidebands increases Amplitude of distant sidebands decreases Amplitude of distant sidebands first increases, then decreases Amplitude of distant sidebands remains constant Amplitude of distant sidebands increases Amplitude of distant sidebands decreases Amplitude of distant sidebands first increases, then decreases ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The characteristic impedance of a twin wire feeder used for TV signals is about 100 ohm 300 ohm 1000 ohm 500 ohm 100 ohm 300 ohm 1000 ohm 500 ohm ANSWER DOWNLOAD EXAMIANS APP
Communication Systems If sampling is done at the rate of 10 kHz. The bandwidth required is 10 kHz 35 kHz 70 kHz 1280 kHz 10 kHz 35 kHz 70 kHz 1280 kHz ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In Pulse Code Modulation system Large bandwidth is required Quantising noise can be overcome by companding Quantising noise can be reduced by decreasing the number of standard levels Suffers from the disadvantage of its incompatibly with TDM Large bandwidth is required Quantising noise can be overcome by companding Quantising noise can be reduced by decreasing the number of standard levels Suffers from the disadvantage of its incompatibly with TDM ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Circular polarization Is useful in reducing depolarization effect on received wave None of these Involves critical alignment of transmitting and receiving antenna Is useful in discrimination between reception of adjacent beams Is useful in reducing depolarization effect on received wave None of these Involves critical alignment of transmitting and receiving antenna Is useful in discrimination between reception of adjacent beams ANSWER DOWNLOAD EXAMIANS APP
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