Radio Receivers A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is 900 kHz 2100 kHz 750 kHz 1650 kHz 900 kHz 2100 kHz 750 kHz 1650 kHz 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 The controlled oscillator synthesizer is sometimes preferred over the direct one because Its frequency stability is better It does not require crystal oscillator It is a simpler piece of equipment It is relatively free of spurious frequency Its frequency stability is better It does not require crystal oscillator It is a simpler piece of equipment It is relatively free of spurious frequency ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A low ratio of the ac to the dc load impedance of a diode detector results in Poor AGC operation Negative-peak clipping Diagonal clipping Poor AF response Poor AGC operation Negative-peak clipping Diagonal clipping Poor AF response ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers One of the main functions of the RF amplifier in a superheterodyne receiver is to 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 Permit better adjacent-channel rejection Improve the rejection of the image frequency Increase the tuning range of the receiver ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency To help the image frequency rejection To permit easier tracking Because otherwise an intermediate frequency could not be produced To allow adequate frequency coverage without switching To help the image frequency rejection To permit easier tracking Because otherwise an intermediate frequency could not be produced To allow adequate frequency coverage without switching ANSWER DOWNLOAD EXAMIANS APP
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