Radio Receivers In a radio receiver with simple 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 The audio stage gain is normally controlled by the AGC ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers If a FET is used as the first AF amplifier in a transistor receiver, this will have the effect of Reducing the effect of noise at low modulation depths Improving the effectiveness of the AGC Reducing the effect of negative-peak clipping Improving the selectivity of the receiver Reducing the effect of noise at low modulation depths Improving the effectiveness of the AGC Reducing the effect of negative-peak clipping Improving the selectivity of the receiver 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. 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 output must be tuned The circuit is always biased in class C, by virtue of the leak-type bias. 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 output must be tuned ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers One of the following cannot be used to demodulate SSB: Complete phase-shift generator Diode Balance modulator Product detector Bipolar transistor balanced modulator Complete phase-shift generator Diode Balance modulator Product detector Bipolar transistor balanced modulator ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The frequency generated by each decade in a direct frequency synthesizer is much higher than the frequency shown; this is done to Reduce the spurious frequency problem Increase the frequency stability of the synthesizer Reduce the number of crystals required Reduce the number of decades Reduce the spurious frequency problem Increase the frequency stability of the synthesizer Reduce the number of crystals required Reduce the number of decades 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
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