DAB Adjacent Channel Selectivity
DAB adjacent channel selectivity describes a tuner's ability to receive a wanted DAB signal despite interference from a neighbouring frequency block.
The result is expressed in decibels (dB). It concerns separation of nearby broadcast signals, not the audio channels or stations carried together within one DAB multiplex.
DAB Adjacent Channel Selectivity — Tuner
Use the figure to compare rejection of a nearby DAB interferer. Greater rejection is better under the same test conditions, so compare the specified frequency separation and reception test rather than the number alone.
Selectivity does not measure how weak a wanted signal the tuner can receive. Antenna conditions and interference still affect reception, and a strong selectivity rating cannot guarantee reliable listening everywhere. FM or AM selectivity figures describe different reception systems and cannot stand in for DAB performance.