In radio receivers, selectivity primarily determines the ability to do what?

Get ready for the FCC General Radiotelephone Operator License (GROL) exam. Study with flashcards and multiple choice questions, each with hints and detailed explanations. Prepare effectively for your licensing test!

Multiple Choice

In radio receivers, selectivity primarily determines the ability to do what?

Selectivity is about how narrowly a receiver responds to frequencies, i.e., how well it isolates the wanted signal from others that are close in frequency. A receiver with good selectivity uses sharp filters in the RF and IF stages to pass only the desired channel and reject signals on adjacent channels. That’s why it primarily determines the ability to reject adjacent channels. Noise figure, dynamic range, and power efficiency involve other aspects of design: noise figure relates to how much noise the receiver adds, dynamic range to handling very weak and very strong signals without distortion, and power efficiency to how much power the device consumes. In practice, better selectivity reduces interference from nearby stations, which is essential in crowded bands.

Selectivity is about how narrowly a receiver responds to frequencies, i.e., how well it isolates the wanted signal from others that are close in frequency. A receiver with good selectivity uses sharp filters in the RF and IF stages to pass only the desired channel and reject signals on adjacent channels. That’s why it primarily determines the ability to reject adjacent channels. Noise figure, dynamic range, and power efficiency involve other aspects of design: noise figure relates to how much noise the receiver adds, dynamic range to handling very weak and very strong signals without distortion, and power efficiency to how much power the device consumes. In practice, better selectivity reduces interference from nearby stations, which is essential in crowded bands.

More practice questions