Communication Systems Which of the following is used to generate PDM? JK flip-flop Schmitt trigger Free running multi-vibrator Monostable multi-vibrator JK flip-flop Schmitt trigger Free running multi-vibrator Monostable multi-vibrator ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In a FM receiver, amplitude limiter Eliminates any change in amplitude of received FM signals Reduces the amplitude of signals None of these Amplifiers low frequency signals Eliminates any change in amplitude of received FM signals Reduces the amplitude of signals None of these Amplifiers low frequency signals ANSWER DOWNLOAD EXAMIANS APP
Communication Systems An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz. 102.3 70.2 80.9 113 102.3 70.2 80.9 113 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Leak type bias is used in plate modulated class C amplifier to Prevent over modulation Prevent tuned circuit damping Increase the bandwidth Prevent excessive grid current Prevent over modulation Prevent tuned circuit damping Increase the bandwidth Prevent excessive grid current ANSWER DOWNLOAD EXAMIANS APP
Communication Systems VSB modulation is preferred in TV because It reduces the bandwidth requirement to half None of these It results in better reception It avoids phase distortion at low frequencies It reduces the bandwidth requirement to half None of these It results in better reception It avoids phase distortion at low frequencies ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Which of the following does not cause losses in optical fibre cables? Microbending Impurities Stepped index operation Attenuation in glass Microbending Impurities Stepped index operation Attenuation in glass ANSWER DOWNLOAD EXAMIANS APP
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