Radio Receivers Show which of the following statements about the amplitude limiter is untrue: 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. When the input increases past the threshold of the limiting, the gain decreases to keep the output constant. Leak-type bias must be used ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate which of the following circuits could not demodulate SSB: Phase discriminator Product modulator BFO Balance modulator Phase discriminator Product modulator BFO Balance modulator 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
Radio Receivers A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is 1650 kHz 2100 kHz 900 kHz 750 kHz 1650 kHz 2100 kHz 900 kHz 750 kHz ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency To allow adequate frequency coverage without switching Because otherwise an intermediate frequency could not be produced To help the image frequency rejection To permit easier tracking To allow adequate frequency coverage without switching Because otherwise an intermediate frequency could not be produced To help the image frequency rejection To permit easier tracking ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a broadcast superheterodyne receiver, the Local oscillator frequency is normally double the IF Mixer input must be tuned to the signal frequency RF amplifier normally works at 455 kHz above the carrier frequency Local oscillator operates below the signal frequency Local oscillator frequency is normally double the IF Mixer input must be tuned to the signal frequency RF amplifier normally works at 455 kHz above the carrier frequency Local oscillator operates below the signal frequency ANSWER DOWNLOAD EXAMIANS APP
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