Radio Receivers If the intermediate frequency is very high (indicate false statement) 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 Tracking will be improved The selectivity will be poor ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The image frequency of a superheterodyne receiver Is independent of the frequency to which the receiver is tuned Is due to insufficient adjacent channel rejection Is created within the receiver itself Is not rejected be the IF tuned circuits Is independent of the frequency to which the receiver is tuned Is due to insufficient adjacent channel rejection Is created within the receiver itself Is not rejected be the IF tuned circuits ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The frequency generated by each decade in a direct frequency synthesizer is much higher than the frequency shown; this is done to Increase the frequency stability of the synthesizer Reduce the number of decades Reduce the number of crystals required Reduce the spurious frequency problem Increase the frequency stability of the synthesizer Reduce the number of decades Reduce the number of crystals required Reduce the spurious frequency problem 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 Increase the tuning range of the receiver Provide improved tracking Improve the rejection of the image frequency Permit better adjacent-channel rejection Increase the tuning range of the receiver Provide improved tracking Improve the rejection of the image frequency ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a broadcast superheterodyne receiver, the Mixer input must be tuned to the signal frequency Local oscillator operates below the signal frequency RF amplifier normally works at 455 kHz above the carrier frequency Local oscillator frequency is normally double the IF Mixer input must be tuned to the signal frequency Local oscillator operates below the signal frequency RF amplifier normally works at 455 kHz above the carrier frequency Local oscillator frequency is normally double the IF 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 audio stage gain is normally controlled by the AGC The highest AGC voltage is produced The faster the AGC time constant the more accurate the output An increase in signal strength produces more AGC The audio stage gain is normally controlled by the AGC The highest AGC voltage is produced ANSWER DOWNLOAD EXAMIANS APP
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