Radio Receivers Show which of the following statements about the amplitude limiter is untrue: The circuit is always biased in class C, by virtue of the leak-type bias. 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 output must be tuned The circuit is always biased in class C, by virtue of the leak-type bias. 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 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. Double conversion is used to improve image rejection Variable sensitivity is used to eliminate selective fading The noise limiter cuts off the receiver’s output during a noise pulse. A product demodulator could be used for the reception of Morse code. Double conversion is used to improve image rejection Variable sensitivity is used to eliminate selective fading The noise limiter cuts off the receiver’s output during a noise pulse. 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 Permit better adjacent-channel rejection Increase the tuning range of the receiver Provide improved tracking Improve the rejection of the image frequency Permit better adjacent-channel rejection Increase the tuning range of the receiver Provide improved tracking ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a radio receiver with simple AGC The audio stage gain is normally controlled by the AGC An increase in signal strength produces more AGC The highest AGC voltage is produced The faster the AGC time constant the more accurate the output The audio stage gain is normally controlled by the AGC An increase in signal strength produces more AGC The highest AGC voltage is produced The faster the AGC time constant the more accurate the output ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The image frequency of a superheterodyne receiver 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 Is due to insufficient adjacent channel rejection Is created within the receiver itself ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A receiver has poor IF selectivity. It will therefore also have poor Blocking Double-spotting Diversion reception Sensitivity Blocking Double-spotting Diversion reception Sensitivity ANSWER DOWNLOAD EXAMIANS APP
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