Scanning pulse

From Memory Alpha, the free Star Trek reference

A scanning pulse is a type of scan that propagates outwards from the originating sensor, detecting any objects it crosses.

A Devore sensor array located near the Tehara system emits a scanning pulse every forty seconds, designed to track warp fields and impulse signatures. (VOY: "Counterpoint")

The Annari warships blockading the Kraylor homeworld send out frequent scanning pulses to illuminate cloaked ships. (VOY: "Nightingale")