Radio Receivers Indicate which of the following circuits could not demodulate SSB: Balance modulator Product modulator Phase discriminator BFO Balance modulator Product modulator Phase discriminator BFO ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers If the intermediate frequency is very high (indicate false statement) Tracking will be improved The selectivity will be poor The local oscillator need not be extremely stable Image frequency rejection is very good Tracking will be improved The selectivity will be poor The local oscillator need not be extremely stable Image frequency rejection is very good ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers To prevent overloading of the IF amplifier in a receiver, one should use Variable sensitivity Variable selectivity Double conversion Squelch Variable sensitivity Variable selectivity Double conversion Squelch ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement in connection with communications receivers. Double conversion is used to improve image rejection The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading A product demodulator could be used for the reception of Morse code. Double conversion is used to improve image rejection The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading A product demodulator could be used for the reception of Morse code. 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 One of the following cannot be used to demodulate SSB: Bipolar transistor balanced modulator Diode Balance modulator Complete phase-shift generator Product detector Bipolar transistor balanced modulator Diode Balance modulator Complete phase-shift generator Product detector ANSWER DOWNLOAD EXAMIANS APP
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