Communication Systems A telephone channel requires a bandwidth of about 3 kHz 50 kHz 10 kHz 1 kHz 3 kHz 50 kHz 10 kHz 1 kHz ANSWER DOWNLOAD EXAMIANS APP
Communication Systems VSB modulation is preferred in TV because It reduces the bandwidth requirement to half It avoids phase distortion at low frequencies It results in better reception None of these It reduces the bandwidth requirement to half It avoids phase distortion at low frequencies It results in better reception None of these ANSWER DOWNLOAD EXAMIANS APP
Communication Systems A cordless telephone using separate frequencies for transmission in base and portable units is known as Neither A nor B Duplex arrangement Half duplex arrangement Either A or B Neither A nor B Duplex arrangement Half duplex arrangement Either A or B ANSWER DOWNLOAD EXAMIANS APP
Communication Systems A three stage telephone switching structure is to have 128 input and 128 output terminals. There are 16 first stage and 16 third stage matrices. To avoid blocking the number of intermediate paths required is 8 15 16 1 8 15 16 1 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Leak type bias is used in plate modulated class C amplifier to Prevent excessive grid current Increase the bandwidth Prevent tuned circuit damping Prevent over modulation Prevent excessive grid current Increase the bandwidth Prevent tuned circuit damping Prevent over modulation ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In case of low level amplitude modulation system, the amplifiers following the modulated stage must be Linear devices Harmonic devices Non-linear devices Class C amplifiers Linear devices Harmonic devices Non-linear devices Class C amplifiers ANSWER DOWNLOAD EXAMIANS APP
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