cathode ray oscilloscope

cath·ode ray os·cil·lo·scope (CRO),

the common form of oscilloscope, in which a varying electrical signal (y) vertically deflects an electron beam impinging on a fluorescent screen, while some other function (x or time) deflects the beam horizontally; the result is a visual graph of y plotted against x or time with negligible distortion by inertia.
References in periodicals archive ?
Johnstone wrote in 1956, "The most suitable type of electrocardiographic equipment for theatre use is the valve amplifier which combines a direct-writing galvanometer monitored by a cathode ray oscilloscope" (5).
These analog signal was converted to digital signal and fed to a cathode ray oscilloscope. A printer was used to get the signal output of the cathode ray oscilloscope.
They noted the position of a rapidly revolving dot of light on a computer-controlled screen (a cathode ray oscilloscope resembling a clock) when the urge to flex a finger or wrist hit them and reported this observation after completing the act.