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 A low ratio of the ac to the dc load impedance of a diode detector results in Poor AF response Negative-peak clipping Diagonal clipping Poor AGC operation Poor AF response Negative-peak clipping Diagonal clipping Poor AGC operation ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The image frequency of a superheterodyne receiver Is due to insufficient adjacent channel rejection Is created within the receiver itself Is independent of the frequency to which the receiver is tuned Is not rejected be the IF tuned circuits Is due to insufficient adjacent channel rejection Is created within the receiver itself Is independent of the frequency to which the receiver is tuned Is not rejected be the IF tuned circuits ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is 900 kHz 750 kHz 1650 kHz 2100 kHz 900 kHz 750 kHz 1650 kHz 2100 kHz ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers One of the following cannot be used to demodulate SSB: Diode Balance modulator Bipolar transistor balanced modulator Complete phase-shift generator Product detector Diode Balance modulator Bipolar transistor balanced modulator Complete phase-shift generator Product detector ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The typical squelch circuit cuts off an audio amplifier when the carrier is absent An IF amplifier when the AGC is minimum RF interference when the signal is weak An IF amplifier when the AGC is maximum an audio amplifier when the carrier is absent An IF amplifier when the AGC is minimum RF interference when the signal is weak An IF amplifier when the AGC is maximum ANSWER DOWNLOAD EXAMIANS APP
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