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 40 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")