horizontal scan rate


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horizontal scan rate

(hardware)
(HSR) The measure of how many scan lines of pixels a monitor can display in one second, expressed in kHz (generally somewhere between 20 and 100 kHz).

The HSR is controlled by the horizontal sync signal generated by the video controller, but is limited by the speed with which the monitor can scan the electron beam horizontally across the screen and then return it to the beginning of the next line.

horizontal scan frequency

The number of lines illuminated on a CRT in one second, which is based on how fast the electron beam moves across the screen from left to right and back again. For example, a resolution of 400 lines refreshed 60 times per second requires a scan rate of 24 kHz (60 x 400) plus time to bring the beam back to the beginning of the next line. Same as "horizontal sync frequency" in TV. Contrast with vertical scan frequency.
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References in periodicals archive ?
Horizontal Scan Rate: The speed in kilohertz at which the horizontallines of the projected image are created.
A horizontal scan rate is the number of lines illuminated on a video screen in one second.
The scan doubler boosts output to 1,000 TV lines in addition to bringing the horizontal scan rate up to 31.5 the horizontal scan rate up to 31.5 kHz, a level termed Improved Definition Television of IDTV.
Units with this feature automatically lock onto the horizontal scan rate of the device serving as the source of the visual material.

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