Alternate Channel Selectivity
Alternate-channel selectivity describes rejection of an interfering station two channel positions away from the wanted station.
It is expressed in decibels under a stated test arrangement. The frequency separation and selected reception bandwidth matter when comparing results.
Alternate Channel Selectivity — Tuner
For a tuner, this rating helps describe the ability to separate a wanted broadcast from a nearby-frequency interferer. Higher rejection under the same conditions means stronger suppression of that interfering signal.
Compare the same channel spacing, test method and tuner bandwidth setting. Alternate-channel selectivity is not adjacent-channel selectivity or rejection of a station on the exact same frequency. A strong figure does not remove the influence of antenna reception, signal strength or other kinds of interference.