Radio Receivers In a ratio detector 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 stabilization against signal strength variations is provided the linearity is worse than in phase discriminator ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a broadcast superheterodyne receiver, the Local oscillator frequency is normally double the IF RF amplifier normally works at 455 kHz above the carrier frequency Mixer input must be tuned to the signal frequency Local oscillator operates below the signal frequency Local oscillator frequency is normally double the IF RF amplifier normally works at 455 kHz above the carrier frequency Mixer input must be tuned to the signal frequency Local oscillator operates below the signal frequency ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers To prevent overloading of the IF amplifier in a receiver, one should use Variable selectivity Squelch Variable sensitivity Double conversion Variable selectivity Squelch Variable sensitivity Double conversion 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 Increase the tuning range of the receiver Improve the rejection of the image frequency Provide improved tracking Permit better adjacent-channel rejection Increase the tuning range of the receiver Improve the rejection of the image frequency ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is 1650 kHz 750 kHz 2100 kHz 900 kHz 1650 kHz 750 kHz 2100 kHz 900 kHz 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 Diagonal clipping Negative-peak clipping Poor AF response Poor AGC operation Diagonal clipping Negative-peak clipping Poor AF response ANSWER DOWNLOAD EXAMIANS APP
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