Delta band emission
Delta band emissions were energy emissions given off by Starfleet tricorders. 

During a visit to a Romulan Warbird that was trapped in time, Lieutenant Commander Data scan emissions caused the temporal aperture that the ship was trapped in to activate, and time resumed. 

Later, Captain Jean-Luc Picard had Data intentionally activate the tricorder to rewind time far enough to prevent the warp core breach that was frozen in progress. Data figured that he "could attempt to remodulate the tricorder's delta band emissions," so as to "better control the temporal aperture."  ()

Energy