Radio Receivers The controlled oscillator synthesizer is sometimes preferred over the direct one because 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 It is a simpler piece of equipment ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The typical squelch circuit cuts off RF interference when the signal is weak An IF amplifier when the AGC is minimum An IF amplifier when the AGC is maximum an audio amplifier when the carrier is absent RF interference when the signal is weak An IF amplifier when the AGC is minimum An IF amplifier when the AGC is maximum an audio amplifier when the carrier is absent 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 The output must be tuned 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. Leak-type bias must be used The output must be tuned When the input increases past the threshold of the limiting, the gain decreases to keep the output constant. 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 negative-peak clipping Reducing the effect of noise at low modulation depths Improving the selectivity of the receiver Improving the effectiveness of the AGC Reducing the effect of negative-peak clipping Reducing the effect of noise at low modulation depths Improving the selectivity of the receiver Improving the effectiveness of the AGC 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 750 kHz 1650 kHz 900 kHz 2100 kHz 750 kHz 1650 kHz 900 kHz 2100 kHz ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate which of the following circuits could not demodulate SSB: Product modulator Phase discriminator Balance modulator BFO Product modulator Phase discriminator Balance modulator BFO ANSWER DOWNLOAD EXAMIANS APP
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