User Manual
DVI2USB 3.0 User Guide Update device EDID
Update device EDID
Extended display identification data (EDID) is data provided by a video display device (usually a monitor) to
describe its capabilities to a video source (usually a graphics or video output card in a PC or another device).
The video source uses the EDID to determine the capabilities of the monitor to determine the resolution, color
depth and other settings that the monitor can support.
In the case of your DVI2USB 3.0, it's acting as the monitor for your video source. Epiphan factory-loads your
video grabber with a comprehensive EDID that describes all the video modes it can support. When you
connect a video source (such as a laptop or video camera), this source interprets your DVI2USB 3.0 as a
monitor and uses its EDID to negotiate which video signal to send.
EDID is crucial for DVI sources but mostly ignored by VGA sources.
Generally, the factory loaded EDID correctly emulates a monitor that supports your video source. However
sometimes, particularly if your source uses a custom set of display properties, you need to help the video
grabber by uploading a custom EDID to force the capture card to report that it emulates a resolution, color
depth, etc needed by your laptop, camera or other video source.
For example, you can upload a custom EDID file to your DVI2USB 3.0 that reports that it only operates
at 1040x768. When the video source reads the EDID from the video grabber, the video source will
reset to operate at 1024x768 as set in the EDID.
In addition needing to load a specific EDID, you may from time to time,want to upgrade your capture device
with the latest factory EDIDfrom Epiphan.
Upload a new EDID
In most circumstances the factory installed default EDID, is sufficient. However, there may be some cases
where a video source uses resolutions that you do not want to use. In that case you can choose an EDID that
forces the video grabber to use a specific set of attributes.
EDID changes are permanent until you replace them with another EDID.
1. First, download a new EDID file, by going to the Epiphan support web page.
2. Select the support page for DVI2USB 3.0.
3. Scroll to the EDID section.
4. Click an EDIDfrom the list; the file is saved to your downloads folder on your hard drive.
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