Kramer Electronics VP-8x4AK - Manual (Page 9)

Your VP-8x4AK 8x4 VGA / UXGA / Audio Matrix Switcher
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3.2 DDC Support
When establishing a VGA connection between a PC or laptop and a display
device, a set of parameters known as EDID is exchanged between them,
which is carried over the DDC channel. In some PC graphic cards and
laptops, this information exchange is essential for proper VGA OUT
operation.
3.3 Defining EDID
The Extended Display Identification Data (EDID
1
Note that EDID is supported between the input 1 and output 1 high-density
15-pin HD connectors on pins 12 and 15.
) is a data-structure,
provided by a display, to describe its capabilities to a graphics card (that is
connected to the display’s source). The EDID enables the PC or laptop to
“know” what kind of monitor is connected to the output. The EDID includes
the manufacturer’s name, the product type, the timing data supported by the
display, the display size, luminance data and (for digital displays only) the
pixel mapping data.
4 Your VP-8x4AK 8x4 VGA / UXGA / Audio Matrix Switcher
Figure 1 , Figure 2 , Table 2 , and Table 3 define the VP-8x4AK 8x4 VGA /
UXGA / Audio Matrix Switcher.
1 Defined by a standard published by the Video Electronics Standards Association (VESA)