Radio Receivers The controlled oscillator synthesizer is sometimes preferred over the direct one because It is relatively free of spurious frequency It is a simpler piece of equipment It does not require crystal oscillator Its frequency stability is better It is relatively free of spurious frequency It is a simpler piece of equipment It does not require crystal oscillator Its frequency stability is better 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 not rejected be the IF tuned circuits Is created within the receiver itself Is due to insufficient adjacent channel rejection Is independent of the frequency to which the receiver is tuned Is not rejected be the IF tuned circuits Is created within the receiver itself Is due to insufficient adjacent channel rejection 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 Improve the rejection of the image frequency Increase the tuning range of the receiver Provide improved tracking Permit better adjacent-channel rejection Improve the rejection of the image frequency Increase the tuning range of the receiver Provide improved tracking ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers If the intermediate frequency is very high (indicate false statement) 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 Tracking will be improved ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The typical squelch circuit cuts off An IF amplifier when the AGC is minimum an audio amplifier when the carrier is absent An IF amplifier when the AGC is maximum RF interference when the signal is weak An IF amplifier when the AGC is minimum an audio amplifier when the carrier is absent An IF amplifier when the AGC is maximum RF interference when the signal is weak ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement. The superheterodyne receiver replaced the TRF receiver because the latter suffered from Instability Inadequate selectivity at high frequencies Gain variation over the frequency coverage range Insufficient gain and sensitivity Instability Inadequate selectivity at high frequencies Gain variation over the frequency coverage range Insufficient gain and sensitivity ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS