Radio Receivers Indicate the false statement in connection with communications receivers. A product demodulator could be used for the reception of Morse code. Double conversion is used to improve image rejection The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading A product demodulator could be used for the reception of Morse code. Double conversion is used to improve image rejection The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers One of the main functions of the RF amplifier in a superheterodyne receiver is to Improve the rejection of the image frequency Increase the tuning range of the receiver Provide improved tracking Permit better adjacent-channel rejection Improve the rejection of the image frequency Increase the tuning range of the receiver Provide improved tracking Permit better adjacent-channel rejection 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 Reduce the number of decades Reduce the spurious frequency problem Increase the frequency stability of the synthesizer Reduce the number of crystals required Reduce the number of decades Reduce the spurious frequency problem Increase the frequency stability of the synthesizer Reduce the number of crystals required 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 In a broadcast superheterodyne receiver, the RF amplifier normally works at 455 kHz above the carrier frequency Local oscillator operates below the signal frequency Mixer input must be tuned to the signal frequency Local oscillator frequency is normally double the IF RF amplifier normally works at 455 kHz above the carrier frequency Local oscillator operates below the signal frequency Mixer input must be tuned to the signal frequency Local oscillator frequency is normally double the IF ANSWER DOWNLOAD EXAMIANS APP
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