Radio Receivers A low ratio of the ac to the dc load impedance of a diode detector results in Diagonal clipping Poor AGC operation Poor AF response Negative-peak clipping Diagonal clipping Poor AGC operation Poor AF response Negative-peak clipping 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 Reduce the number of crystals required Increase the frequency stability of the synthesizer Reduce the number of decades Reduce the spurious frequency problem Reduce the number of crystals required Increase the frequency stability of the synthesizer ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers One of the following cannot be used to demodulate SSB: Bipolar transistor balanced modulator Diode Balance modulator Complete phase-shift generator Product detector Bipolar transistor balanced modulator Diode Balance modulator Complete phase-shift generator Product detector ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The image frequency of a superheterodyne receiver Is not rejected be the IF tuned circuits Is independent of the frequency to which the receiver is tuned Is due to insufficient adjacent channel rejection Is created within the receiver itself Is not rejected be the IF tuned circuits Is independent of the frequency to which the receiver is tuned Is due to insufficient adjacent channel rejection Is created within the receiver itself 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 1650 kHz 750 kHz 900 kHz 2100 kHz 1650 kHz 750 kHz 900 kHz 2100 kHz ANSWER DOWNLOAD EXAMIANS APP
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
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