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 decreases Amplitude of distant sidebands increases Amplitude of distant sidebands first increases, then decreases Amplitude of distant sidebands remains constant Amplitude of distant sidebands decreases Amplitude of distant sidebands increases Amplitude of distant sidebands first increases, then decreases ANSWER DOWNLOAD EXAMIANS APP
Communication Systems One of the advantages of base modulation over collector modulation of a transistor class C amplifier is Better linearity Improved efficiency The lower modulating power requirement High power output per transistor Better linearity Improved efficiency The lower modulating power requirement High power output per transistor ANSWER DOWNLOAD EXAMIANS APP
Communication Systems DVD uses None of these Laser beam for recording and video head for playback Laser beam for both recording and playback Video head for recording and laser beam for playback None of these Laser beam for recording and video head for playback Laser beam for both recording and playback Video head for recording and laser beam for playback 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 Speech voltage to be transmitted Resultant wave Voltage with constant frequency, phase or amplitude Voltage for which frequency, phase or amplitude is varied Speech voltage to be transmitted Resultant wave ANSWER DOWNLOAD EXAMIANS APP
Communication Systems For telegraphy the most commonly used modulation system is Two tone modulation FSK PCM Single tone modulation Two tone modulation FSK PCM Single tone modulation ANSWER DOWNLOAD EXAMIANS APP
Communication Systems To eliminate ghosts in the picture Twist the transmission line Use a longer transmission line Change the antenna orientation of location Connect a booster Twist the transmission line Use a longer transmission line Change the antenna orientation of location Connect a booster ANSWER DOWNLOAD EXAMIANS APP
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