Radio Receivers Indicate the false statement in connection with communications receivers. The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading A product demodulator could be used for the reception of Morse code. Double conversion is used to improve image rejection The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading A product demodulator could be used for the reception of Morse code. Double conversion is used to improve image rejection ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A receiver has poor IF selectivity. It will therefore also have poor Sensitivity Blocking Diversion reception Double-spotting Sensitivity Blocking Diversion reception Double-spotting ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a ratio detector the circuit is the same as in a discriminator, except that the diodes are reversed the output is twice that obtainable from a similar phase discriminator the linearity is worse than in phase discriminator stabilization against signal strength variations is provided the circuit is the same as in a discriminator, except that the diodes are reversed the output is twice that obtainable from a similar phase discriminator the linearity is worse than in phase discriminator stabilization against signal strength variations is provided ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement. The superheterodyne receiver replaced the TRF receiver because the latter suffered from Gain variation over the frequency coverage range Inadequate selectivity at high frequencies Instability Insufficient gain and sensitivity Gain variation over the frequency coverage range Inadequate selectivity at high frequencies Instability Insufficient gain and sensitivity ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a radio receiver with simple AGC The faster the AGC time constant the more accurate the output An increase in signal strength produces more AGC The audio stage gain is normally controlled by the AGC The highest AGC voltage is produced The faster the AGC time constant the more accurate the output An increase in signal strength produces more AGC The audio stage gain is normally controlled by the AGC The highest AGC voltage is produced ANSWER DOWNLOAD EXAMIANS APP
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. The output must be tuned Leak-type bias must be used 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. The output must be tuned Leak-type bias must be used When the input increases past the threshold of the limiting, the gain decreases to keep the output constant. ANSWER DOWNLOAD EXAMIANS APP
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