Retrace (Return Trace)
Retrace (Return Trace) – a) The movement of the electron beam from the right-hand edge of the display to the left-hand edge or from bottom to top. Retrace occurs during the blanking time. b) The return of the electron beam in a CRT to the starting point after scanning. During retrace, the beam is typically turned off. All of the sync information is placed in this invisible portion of the video signal. May refer to retrace after each horizontal line or after each vertical scan (field). See Horizontal Retrace and Vertical Retrace.
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