Communication Systems The disadvantage of FM over AM is that Large bandwidth is required Noise is very high for high frequency High output power is needed High modulating power is needed Large bandwidth is required Noise is very high for high frequency High output power is needed High modulating power is needed ANSWER DOWNLOAD EXAMIANS APP
Communication Systems A woofer should be fed from the input through a High pass filter Low pass filter Band pass filter Band stop filter High pass filter Low pass filter Band pass filter Band stop filter ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The modulation index of an FM is changed from 0 to 1. How does the transmitted power change? Gets doubled Gets halved Remains unchanged Gets increased by 50 percent Gets doubled Gets halved Remains unchanged Gets increased by 50 percent 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 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 Amplitude of distant sidebands remains constant Amplitude of distant sidebands decreases Amplitude of distant sidebands increases ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Which of the following is used to generate PDM? JK flip-flop Monostable multi-vibrator Free running multi-vibrator Schmitt trigger JK flip-flop Monostable multi-vibrator Free running multi-vibrator Schmitt trigger ANSWER DOWNLOAD EXAMIANS APP
Communication Systems A modem is classified as low speed if data rate handled is Upto 100 bps Upto 600 bps Upto 400 bps Upto 250 bps Upto 100 bps Upto 600 bps Upto 400 bps Upto 250 bps ANSWER DOWNLOAD EXAMIANS APP
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