Communication Systems For a low level AM system, the amplifiers modulated stage must be Harmonic devices Class C amplifiers Linear devices Non-linear devices Harmonic devices Class C amplifiers Linear devices Non-linear devices ANSWER DOWNLOAD EXAMIANS APP
Communication Systems For attenuation of high frequencies we should use Series capacitance Inductance Shunt capacitance Resistance Series capacitance Inductance Shunt capacitance Resistance ANSWER DOWNLOAD EXAMIANS APP
Communication Systems VSB modulation is preferred in TV because 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 It reduces the bandwidth requirement to half It avoids phase distortion at low frequencies It results in better reception ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In Modulation, “carrier” is Voltage with constant frequency, phase or amplitude Voltage for which frequency, phase or amplitude is varied Resultant wave Speech voltage to be transmitted Voltage with constant frequency, phase or amplitude Voltage for which frequency, phase or amplitude is varied Resultant wave Speech voltage to be transmitted ANSWER DOWNLOAD EXAMIANS APP
Communication Systems FM transmitting and receiving equipment as compared to AM equipment is None of these Costly Almost equally costly Cheaper None of these Costly Almost equally costly Cheaper ANSWER DOWNLOAD EXAMIANS APP
Communication Systems DVD uses Video head for recording and laser beam for playback Laser beam for both recording and playback Laser beam for recording and video head for playback None of these Video head for recording and laser beam for playback Laser beam for both recording and playback Laser beam for recording and video head for playback None of these ANSWER DOWNLOAD EXAMIANS APP
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