What is an advantage of having a variety of receiver bandwidths from which to select?
The noise figure of the RF amplifier can be adjusted to match the modulation type, thus increasing receiver sensitivity
Receiver power consumption can be reduced when wider bandwidth is not required
Receive bandwidth can be set to match the modulation bandwidth, maximizing signal-to-noise ratio and minimizing interference✓Bonne réponse
Multiple frequencies can be received simultaneously if desired
Explication
Noise power admitted is proportional to bandwidth, so narrowing the passband to just the width the modulation occupies keeps the whole wanted signal while discarding noise and adjacent-signal energy. That maximizes signal-to-noise ratio and minimizes interference; it does not alter the RF amplifier's noise figure.