Radio Receivers Indicate which of the following circuits could not demodulate SSB: Product modulator Balance modulator Phase discriminator BFO Product modulator Balance modulator Phase discriminator BFO 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. 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 The circuit is always biased in class C, by virtue of the leak-type bias. Leak-type bias must be used 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 The frequency generated by each decade in a direct frequency synthesizer is much higher than the frequency shown; this is done to 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 Reduce the spurious frequency problem 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 1650 kHz 2100 kHz 750 kHz 900 kHz 1650 kHz 2100 kHz 750 kHz ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers If the intermediate frequency is very high (indicate false statement) The local oscillator need not be extremely stable Tracking will be improved The selectivity will be poor Image frequency rejection is very good The local oscillator need not be extremely stable Tracking will be improved The selectivity will be poor Image frequency rejection is very good ANSWER DOWNLOAD EXAMIANS APP
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