Radio Receivers Indicate which of the following circuits could not demodulate SSB: BFO Product modulator Balance modulator Phase discriminator BFO Product modulator Balance modulator Phase discriminator ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers To prevent overloading of the IF amplifier in a receiver, one should use Variable selectivity Squelch Double conversion Variable sensitivity Variable selectivity Squelch Double conversion Variable sensitivity ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Show which of the following statements about the amplitude limiter is untrue: 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 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. ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The typical squelch circuit cuts off 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 an audio amplifier when the carrier is absent ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a radio receiver with simple AGC 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 An increase in signal strength produces more AGC The highest AGC voltage is produced ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers When a receiver has good blocking performance, this means that It does not suffer from double-spotting Its image frequency rejection is poor It is unaffected by AGC derived from nearby transmissions Its detector suffers from burnout It does not suffer from double-spotting Its image frequency rejection is poor It is unaffected by AGC derived from nearby transmissions Its detector suffers from burnout ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS