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. The circuit is always biased in class C, by virtue of the leak-type bias. Leak-type bias must be used The output must be tuned When the input increases past the threshold of the limiting, the gain decreases to keep the output constant. The circuit is always biased in class C, by virtue of the leak-type bias. Leak-type bias must be used The output must be tuned ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive ISB Single-sideband, reduced-carrier Single-sideband, suppressed-carrier Single-sideband, full-carrier ISB Single-sideband, reduced-carrier Single-sideband, suppressed-carrier Single-sideband, full-carrier ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate which of the following circuits could not demodulate SSB: BFO Phase discriminator Balance modulator Product modulator BFO Phase discriminator Balance modulator Product modulator 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. Variable sensitivity is used to eliminate selective fading Double conversion is used to improve image rejection 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. Variable sensitivity is used to eliminate selective fading Double conversion is used to improve image rejection The noise limiter cuts off the receiver’s output during a noise pulse. ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers To prevent overloading of the IF amplifier in a receiver, one should use Variable sensitivity Squelch Variable selectivity Double conversion Variable sensitivity Squelch Variable selectivity Double conversion ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a radio receiver with simple AGC The highest AGC voltage is produced The audio stage gain is normally controlled by the AGC An increase in signal strength produces more AGC The faster the AGC time constant the more accurate the output The highest AGC voltage is produced The audio stage gain is normally controlled by the AGC An increase in signal strength produces more AGC The faster the AGC time constant the more accurate the output ANSWER DOWNLOAD EXAMIANS APP
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