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 Reduce the number of crystals required Reduce the number of decades Increase the frequency stability of the synthesizer Reduce the spurious frequency problem Reduce the number of crystals required Reduce the number of decades Increase the frequency stability of the synthesizer 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 Improving the selectivity of the receiver Reducing the effect of negative-peak clipping Reducing the effect of noise at low modulation depths Improving the effectiveness of the AGC Improving the selectivity of the receiver Reducing the effect of negative-peak clipping Reducing the effect of noise at low modulation depths Improving the effectiveness of the AGC ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate which of the following statements about the advantages of the phase discriminator over the slope detector is false: Greater limiting Much easier alignment Better linearity Fewer tuned circuits Greater limiting Much easier alignment Better linearity Fewer tuned circuits ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is 900 kHz 2100 kHz 1650 kHz 750 kHz 900 kHz 2100 kHz 1650 kHz 750 kHz ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The controlled oscillator synthesizer is sometimes preferred over the direct one because It is a simpler piece of equipment It is relatively free of spurious frequency It does not require crystal oscillator Its frequency stability is better It is a simpler piece of equipment It is relatively free of spurious frequency It does not require crystal oscillator 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
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