Radio Receivers One of the main functions of the RF amplifier in a superheterodyne receiver is to Increase the tuning range of the receiver Permit better adjacent-channel rejection Provide improved tracking Improve the rejection of the image frequency Increase the tuning range of the receiver Permit better adjacent-channel rejection Provide improved tracking Improve the rejection of the image frequency ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The controlled oscillator synthesizer is sometimes preferred over the direct one because It is a simpler piece of equipment It is relatively free of spurious frequency It does not require crystal oscillator Its frequency stability is better It is a simpler piece of equipment It is relatively free of spurious frequency It does not require crystal oscillator Its frequency stability is better ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The image frequency of a superheterodyne receiver Is not rejected be the IF tuned circuits Is due to insufficient adjacent channel rejection Is independent of the frequency to which the receiver is tuned Is created within the receiver itself Is not rejected be the IF tuned circuits Is due to insufficient adjacent channel rejection Is independent of the frequency to which the receiver is tuned Is created within the receiver itself ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive Single-sideband, suppressed-carrier Single-sideband, full-carrier ISB Single-sideband, reduced-carrier Single-sideband, suppressed-carrier Single-sideband, full-carrier ISB Single-sideband, reduced-carrier ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers To prevent overloading of the IF amplifier in a receiver, one should use Double conversion Variable sensitivity Squelch Variable selectivity Double conversion Variable sensitivity Squelch Variable selectivity ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The typical squelch circuit cuts off RF interference when the signal is weak an audio amplifier when the carrier is absent An IF amplifier when the AGC is maximum An IF amplifier when the AGC is minimum RF interference when the signal is weak an audio amplifier when the carrier is absent An IF amplifier when the AGC is maximum An IF amplifier when the AGC is minimum ANSWER DOWNLOAD EXAMIANS APP
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