Radio Receivers Show which of the following statements about the amplitude limiter is untrue: The output must be tuned 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 circuit is always biased in class C, by virtue of the leak-type bias. The output must be tuned 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 circuit is always biased in class C, by virtue of the leak-type bias. ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers One of the main functions of the RF amplifier in a superheterodyne receiver is to Permit better adjacent-channel rejection Provide improved tracking Increase the tuning range of the receiver Improve the rejection of the image frequency Permit better adjacent-channel rejection Provide improved tracking Increase the tuning range of the receiver Improve the rejection of the image frequency ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate which of the following statements about the advantages of the phase discriminator over the slope detector is false: Better linearity Fewer tuned circuits Greater limiting Much easier alignment Better linearity Fewer tuned circuits Greater limiting Much easier alignment ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A receiver has poor IF selectivity. It will therefore also have poor Blocking Sensitivity Double-spotting Diversion reception Blocking Sensitivity Double-spotting Diversion reception ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement in connection with communications receivers. Double conversion is used to improve image rejection Variable sensitivity is used to eliminate selective fading The noise limiter cuts off the receiver’s output during a noise pulse. A product demodulator could be used for the reception of Morse code. Double conversion is used to improve image rejection Variable sensitivity is used to eliminate selective fading The noise limiter cuts off the receiver’s output during a noise pulse. A product demodulator could be used for the reception of Morse code. ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a broadcast superheterodyne receiver, the Local oscillator frequency is normally double the IF RF amplifier normally works at 455 kHz above the carrier frequency Mixer input must be tuned to the signal frequency Local oscillator operates below the signal frequency Local oscillator frequency is normally double the IF RF amplifier normally works at 455 kHz above the carrier frequency Mixer input must be tuned to the signal frequency Local oscillator operates below the signal frequency ANSWER DOWNLOAD EXAMIANS APP
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