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 Local oscillator operates below the signal frequency Mixer input must be tuned to the signal frequency Local oscillator frequency is normally double the IF RF amplifier normally works at 455 kHz above the carrier frequency Local oscillator operates below the signal frequency Mixer input must be tuned to the signal frequency ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement in connection with communications receivers. A product demodulator could be used for the reception of Morse code. Variable sensitivity is used to eliminate selective fading The noise limiter cuts off the receiver’s output during a noise pulse. Double conversion is used to improve image rejection A product demodulator could be used for the reception of Morse code. Variable sensitivity is used to eliminate selective fading The noise limiter cuts off the receiver’s output during a noise pulse. Double conversion is used to improve image rejection ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers If a FET is used as the first AF amplifier in a transistor receiver, this will have the effect of Improving the effectiveness of the AGC Reducing the effect of negative-peak clipping Improving the selectivity of the receiver Reducing the effect of noise at low modulation depths Improving the effectiveness of the AGC Reducing the effect of negative-peak clipping Improving the selectivity of the receiver Reducing the effect of noise at low modulation depths ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive Single-sideband, full-carrier Single-sideband, reduced-carrier Single-sideband, suppressed-carrier ISB Single-sideband, full-carrier Single-sideband, reduced-carrier Single-sideband, suppressed-carrier ISB ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A receiver has poor IF selectivity. It will therefore also have poor Double-spotting Sensitivity Diversion reception Blocking Double-spotting Sensitivity Diversion reception Blocking ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a radio receiver with simple AGC The faster the AGC time constant the more accurate the output An increase in signal strength produces more AGC The highest AGC voltage is produced The audio stage gain is normally controlled by the AGC The faster the AGC time constant the more accurate the output An increase in signal strength produces more AGC The highest AGC voltage is produced The audio stage gain is normally controlled by the AGC ANSWER DOWNLOAD EXAMIANS APP
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