Discussion
Selectivity in a receiver refers to its ability to
Answer: D
Selectivity is the rejection of neighbouring channels, provided chiefly by the intermediate frequency filter, and it is quite separate from sensitivity, which is the ability to amplify weak signals. A receiver can be very sensitive and hopelessly unselective, in which case a strong local station will be heard across the dial. Envelope tracking is the detector's job. And frequency tracking is what the tuning and, in some designs, a control loop provide.
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