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 Improve the rejection of the image frequency Increase the tuning range of the receiver Permit better adjacent-channel rejection Provide improved tracking Improve the rejection of the image frequency Increase the tuning range of the receiver ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers If the intermediate frequency is very high (indicate false statement) 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 The local oscillator need not be extremely stable Tracking will be improved The selectivity will be poor 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 Insufficient gain and sensitivity Instability Gain variation over the frequency coverage range Inadequate selectivity at high frequencies Insufficient gain and sensitivity Instability ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers One of the following cannot be used to demodulate SSB: Diode Balance modulator Bipolar transistor balanced modulator Complete phase-shift generator Product detector Diode Balance modulator Bipolar transistor balanced modulator Complete phase-shift generator Product detector ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a radio receiver with simple AGC The audio stage gain is normally controlled by the AGC An increase in signal strength produces more AGC The highest AGC voltage is produced The faster the AGC time constant the more accurate the output The audio stage gain is normally controlled by the AGC An increase in signal strength produces more AGC The highest AGC voltage is produced The faster the AGC time constant the more accurate the output 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 Much easier alignment Fewer tuned circuits Greater limiting Better linearity Much easier alignment Fewer tuned circuits Greater limiting ANSWER DOWNLOAD EXAMIANS APP
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