Advantech ARK-3440 Series, User Manual

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47 ARK-3440 User Manual
Appendix B
D
isplay
Application
B.3.1 Display modes

Clone mode
Initially on PCs, the multiple output interface was designed to display the same image
on all output interfaces (sometimes referred to as mirroring or cloning). This reflected
the fact that these video cards were originally used in presentations where the user
typically had his or her face to the audience with a duplicate of the projected image
available to the presenter.

Span mode
Alternatively, some video cards are able to "span" the existing desktop area across
two monitors rather than create additional desktop space. This is accomplished by
using a resolution such as 2048x768 each monitor at 1024x768 resolutions. Each
monitor needs to have the same color depth settings, and often the same refresh
rate. Differing resolutions may result in issues pertaining to some screen space not
being assigned to either monitor.

Extended mode
In "extended" mode, additional desktop area is created on additional monitors. Each
monitor can use different settings (resolution, color, refresh rate). Macintosh comput-
ers have supported the "extended desktop" concept since the late 1980s, increasing
the platform's utility for professional media and software developers such as graphic
designers, video editors, and game developers.
The concept was further developed by PC manufacturers and led to the "extended"
or "independent displays" mode and the "spanning" or "stretched" display mode. In
both of these modes, display devices are positioned next to each other in order to
create the illusion that the two displays are logically contiguous.
B.4 Display Resolution Setting
The ARK-3440 can drive CRT displays with resolutions up to 2048 x 1536@60Hz
and support up to 48 bits LVDS display mode up to UXGA panel resolution with fre-
quency range from 25MHz to 112MHz.