AM Selectivity
AM selectivity describes a tuner's ability to reject a nearby station while receiving the wanted AM broadcast.
It is expressed in decibels (dB), alongside the frequency separation from the interfering signal. The offset matters: ±9 kHz and ±10 kHz describe different test conditions.
AM Selectivity — Tuner
Use this figure to compare rejection of neighbouring stations. A higher value means stronger rejection under the same conditions. Compare the same offset and, where selectable, the same Wide or Narrow bandwidth setting; a minimum rating is a limit rather than an exact result.
Narrow filtering can reduce interference but also restrict the received audio bandwidth. Selectivity does not measure weak-signal sensitivity, and an FM selectivity figure cannot substitute for the AM figure.