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 created within the receiver itself Is due to insufficient adjacent channel rejection Is independent of the frequency to which the receiver is tuned Is not rejected be the IF tuned circuits Is created within the receiver itself Is due to insufficient adjacent channel rejection ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The controlled oscillator synthesizer is sometimes preferred over the direct one because It does not require crystal oscillator It is a simpler piece of equipment It is relatively free of spurious frequency Its frequency stability is better It does not require crystal oscillator It is a simpler piece of equipment It is relatively free of spurious frequency Its frequency stability is better ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A low ratio of the ac to the dc load impedance of a diode detector results in Poor AF response Negative-peak clipping Diagonal clipping Poor AGC operation Poor AF response Negative-peak clipping Diagonal clipping Poor AGC operation ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency To allow adequate frequency coverage without switching To permit easier tracking Because otherwise an intermediate frequency could not be produced To help the image frequency rejection To allow adequate frequency coverage without switching To permit easier tracking Because otherwise an intermediate frequency could not be produced To help the image frequency rejection ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a radio receiver with simple AGC The faster the AGC time constant the more accurate the output The highest AGC voltage is produced An increase in signal strength produces more AGC The audio stage gain is normally controlled by the AGC The faster the AGC time constant the more accurate the output The highest AGC voltage is produced An increase in signal strength produces more AGC The audio stage gain is normally controlled by the AGC ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The typical squelch circuit cuts off an audio amplifier when the carrier is absent An IF amplifier when the AGC is maximum An IF amplifier when the AGC is minimum RF interference when the signal is weak an audio amplifier when the carrier is absent An IF amplifier when the AGC is maximum An IF amplifier when the AGC is minimum RF interference when the signal is weak ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS