[′stȯr·ij ə¦sil·ə‚skōp] (electronics) An oscilloscope that can retain an image for a period of time ranging from minutes to days, or until deliberately erased to make room for a new image.
storage oscilloscope
stor·age os·cil·lo·scope
a cathode ray oscilloscope in which the visual record of oscillations persists on the fluorescent screen until erased electrically.