Intensity-modulated indicator

From Glossary of Meteorology

intensity-modulated indicator

A general class of radar display or indicator in which echoes from targets are presented as areas of light with intensity, brilliance, or color normally a function of the power of the target signal.

These indicators usually show the position of a target in terms of spatial coordinates. B-scopes, PPI scopes, and RHI scopes are intensity modulated.
See intensity modulation.