The portion of a video signal that instructs where information should be displayed in a left to right dimension.

the horizontal synchronisation signal used to time each row of pixels.

A synchronizing pulse used to control the horizontal sweeps of the monitor's electron beam. During each horizontal sweep one line of video is painted on the screen.

the pulses that control the line-by-line synchronisation of the scanning lines.

The lowest portion of the horizontal blanking part of the video signal, it provides a pulse for synchronizing video input with output. Also known as h sync. See also horizontal blanking and video waveform.

The pulses that control the horizontal scanning of the electron beam in a video device. On connector panels, "H" identifies the connector for horizontal sync, and "H/HV" means it is also used for combined or "composite" horizontal and vertical sync (RGBS).