User Manual

DVI2USB 3.0 User Guide Update device EDID
Practical EDID example
Here's an example that helpfully shows how a custom EDID resolved a problem.
A user was viewing the video output from a system using a monitor. The monitor displayed video images at a
screen resolution of 640x480. When the user replaced the flat panel monitor with a DVI2USB 3.0, the source
system changed it's video output resolution to 720x400.
Why did this happen? It turned out that the video source preferred to output 720×400, but because the
original monitor did not support 720×400, the video source was forced to operate at 640×480. The DVI2USB
3.0 supported 720×400 so the system changed to this resolution.
The user wanted to force the video source to operat at 640×480 but could not manually adjust the screen
resolution. To solve the problem, Epiphan created a custom EDID for the DVI2USB 3.0 that excluded support
for 720×400. When the user uploaded the custom EDID to the video grabber, the video source found that it
no longer supported 720×400 so it returned to operating at 640×480.
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