Communication Systems If output power of a radio receiver is doubled, its volume is increased by __________ dB. 3 -3 1 2 3 -3 1 2 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In practical commercial FM system, channel bandwidth is 88 MHz 100 kHz 108 MHz 150 kHz 88 MHz 100 kHz 108 MHz 150 kHz ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The disadvantage of FM over AM is that High output power is needed Noise is very high for high frequency Large bandwidth is required High modulating power is needed High output power is needed Noise is very high for high frequency Large bandwidth is required High modulating power is needed ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Leak type bias is used in plate modulated class C amplifier to Prevent excessive grid current Prevent tuned circuit damping Increase the bandwidth Prevent over modulation Prevent excessive grid current Prevent tuned circuit damping Increase the bandwidth 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 Harmonic devices Class C amplifiers Non-linear devices Linear devices Harmonic devices Class C amplifiers Non-linear devices Linear devices ANSWER DOWNLOAD EXAMIANS APP
Communication Systems SSB can be generated by Phase cancellation method All of these Good attenuation characteristics Filter method Phase cancellation method All of these Good attenuation characteristics Filter method ANSWER DOWNLOAD EXAMIANS APP
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