Radio Receivers Indicate which of the following circuits could not demodulate SSB: Phase discriminator BFO Product modulator Balance modulator Phase discriminator BFO Product modulator Balance modulator ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A low ratio of the ac to the dc load impedance of a diode detector results in Poor AGC operation Poor AF response Diagonal clipping Negative-peak clipping Poor AGC operation Poor AF response Diagonal clipping Negative-peak clipping ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers One of the main functions of the RF amplifier in a superheterodyne receiver is to Improve the rejection of the image frequency Provide improved tracking Increase the tuning range of the receiver Permit better adjacent-channel rejection Improve the rejection of the image frequency Provide improved tracking Increase the tuning range of the receiver Permit better adjacent-channel rejection ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement. The superheterodyne receiver replaced the TRF receiver because the latter suffered from Inadequate selectivity at high frequencies Instability Gain variation over the frequency coverage range Insufficient gain and sensitivity Inadequate selectivity at high frequencies Instability Gain variation over the frequency coverage range Insufficient gain and sensitivity ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Show which of the following statements about the amplitude limiter is untrue: When the input increases past the threshold of the limiting, the gain decreases to keep the output constant. Leak-type bias must be used The output must be tuned The circuit is always biased in class C, by virtue of the leak-type bias. When the input increases past the threshold of the limiting, the gain decreases to keep the output constant. Leak-type bias must be used The output must be tuned The circuit is always biased in class C, by virtue of the leak-type bias. 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 does not require crystal oscillator It is relatively free of spurious frequency Its frequency stability is better It is a simpler piece of equipment It does not require crystal oscillator It is relatively free of spurious frequency Its frequency stability is better ANSWER DOWNLOAD EXAMIANS APP
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