Radio Receivers A low ratio of the ac to the dc load impedance of a diode detector results in Diagonal clipping Negative-peak clipping Poor AF response Poor AGC operation Diagonal clipping Negative-peak clipping Poor AF response Poor AGC operation ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Show which of the following statements about the amplitude limiter is untrue: When the input increases past the threshold of the limiting, the gain decreases to keep the output constant. Leak-type bias must be used The circuit is always biased in class C, by virtue of the leak-type bias. The output must be tuned When the input increases past the threshold of the limiting, the gain decreases to keep the output constant. Leak-type bias must be used The circuit is always biased in class C, by virtue of the leak-type bias. The output must be tuned 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. The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading Double conversion is used to improve image rejection A product demodulator could be used for the reception of Morse code. The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading Double conversion is used to improve image rejection ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive ISB Single-sideband, full-carrier Single-sideband, suppressed-carrier Single-sideband, reduced-carrier ISB Single-sideband, full-carrier Single-sideband, suppressed-carrier Single-sideband, reduced-carrier ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The image frequency of a superheterodyne receiver 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 Is not rejected be the IF tuned circuits ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a radio receiver with simple AGC An increase in signal strength produces more AGC The highest AGC voltage is produced The audio stage gain is normally controlled by the AGC The faster the AGC time constant the more accurate the output An increase in signal strength produces more AGC The highest AGC voltage is produced The audio stage gain is normally controlled by the AGC The faster the AGC time constant the more accurate the output ANSWER DOWNLOAD EXAMIANS APP
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