Radio Receivers The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency To permit easier tracking To allow adequate frequency coverage without switching To help the image frequency rejection Because otherwise an intermediate frequency could not be produced To permit easier tracking To allow adequate frequency coverage without switching To help the image frequency rejection Because otherwise an intermediate frequency could not be produced ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The typical squelch circuit cuts off RF interference when the signal is weak An IF amplifier when the AGC is minimum An IF amplifier when the AGC is maximum an audio amplifier when the carrier is absent RF interference when the signal is weak An IF amplifier when the AGC is minimum An IF amplifier when the AGC is maximum an audio amplifier when the carrier is absent ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate which of the following statements about the advantages of the phase discriminator over the slope detector is false: Better linearity Greater limiting Fewer tuned circuits Much easier alignment Better linearity Greater limiting Fewer tuned circuits Much easier alignment ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement in connection with communications receivers. Variable sensitivity is used to eliminate selective fading The noise limiter cuts off the receiver’s output during a noise pulse. Double conversion is used to improve image rejection A product demodulator could be used for the reception of Morse code. Variable sensitivity is used to eliminate selective fading The noise limiter cuts off the receiver’s output during a noise pulse. Double conversion is used to improve image rejection A product demodulator could be used for the reception of Morse code. ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive Single-sideband, full-carrier Single-sideband, reduced-carrier Single-sideband, suppressed-carrier ISB Single-sideband, full-carrier Single-sideband, reduced-carrier Single-sideband, suppressed-carrier ISB ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The frequency generated by each decade in a direct frequency synthesizer is much higher than the frequency shown; this is done to Increase the frequency stability of the synthesizer Reduce the spurious frequency problem Reduce the number of crystals required Reduce the number of decades Increase the frequency stability of the synthesizer Reduce the spurious frequency problem Reduce the number of crystals required Reduce the number of decades ANSWER DOWNLOAD EXAMIANS APP
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