Epiphan DVI2USB 3.0 - Manual (Page 74)

Advanced Topics
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DVI2USB 3.0 User Guide
determine the resolution, color depth and other settings that the monitor will accept.
EDID is defined by a standard published by the Video Electronics Standards
Association (VESA). The EDID includes manufacturer name, product type, phosphor
or filter type, timings supported by the display device, display size, luminance data and
(for digital displays only) pixel mapping data. EDID is crucial for DVI sources but
mostly ignored by VGA sources.
When you connect a DVI2USB 3.0 to a video source, the video source sees the
DVI2USB 3.0 as a monitor. Just like a monitor, the DVI2USB 3.0 contains EDID that is
used by the video source to determine the video signal to send to the DVI2USB 3.0.
Usually you would operate a DVI2USB 3.0using the factory installed default EDID.
However, in some cases when you connect a DVI2USB 3.0 to a video source, the
video source may operate using video settings that you do not want it to operate at.
For instance, you can control the video source output settings by uploading a custom
EDID file to the DVI2USB 3.0. The EDID information in the file restricts the video
signal that can be accepted by the DVI2USB 3.0. For example, you can upload a
custom EDID file to your DVI2USB 3.0that reports that the DVI2USB 3.0only operates
at 1040x768. When the video source reads the EDID from the DVI2USB 3.0, the video
source will reset to operate at 1024x768 as set in the EDID.
You can obtain custom EDID files from Epiphan Support. You can also download
custom EDID files for DVI2USB 3.0 frame grabber from the frame grabber product
page of the Epiphan web site. This page contains custom EDIDs for single video
resolutions (for example, 640x480 only, 800x600 only, and 1024x768 only) for each
DVI2USB 3.0. This page also contains default EDIDs for each DVI2USB 3.0. You can
use the custom EDIDs to restrict the video resolution of the video source connected to
the DVI2USB 3.0. You can use the default EDIDs to return your DVI2USB 3.0 to
normal operation.