Radio Receivers In a ratio detector stabilization against signal strength variations is provided the linearity is worse than in phase discriminator the output is twice that obtainable from a similar phase discriminator the circuit is the same as in a discriminator, except that the diodes are reversed stabilization against signal strength variations is provided the linearity is worse than in phase discriminator the output is twice that obtainable from a similar phase discriminator the circuit is the same as in a discriminator, except that the diodes are reversed 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 Reduce the number of crystals required Reduce the number of decades Reduce the spurious frequency problem Increase the frequency stability of the synthesizer Reduce the number of crystals required Reduce the number of decades Reduce the spurious frequency problem Increase the frequency stability of the synthesizer ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement in connection with communications receivers. Double conversion is used to improve image rejection A product demodulator could be used for the reception of Morse code. The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading Double conversion is used to improve image rejection A product demodulator could be used for the reception of Morse code. The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement. Noting that no carrier is transmitter with J3E, we see that Adjacent-channel rejection is more difficult The receiver cannot use a phase comparator for AFC The transmission is not compatible with A3E Production of AGC is a rather complicated process Adjacent-channel rejection is more difficult The receiver cannot use a phase comparator for AFC The transmission is not compatible with A3E Production of AGC is a rather complicated process 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 One of the main functions of the RF amplifier in a superheterodyne receiver is to 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 Permit better adjacent-channel rejection Provide improved tracking ANSWER DOWNLOAD EXAMIANS APP
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