Epiphan DVI2USB 3.0 - Manual (Page 75)

Advanced Topics
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DVI2USB 3.0 User Guide
14.1.2 Changing the EDID on your frame grabber
Use the following steps to upload a new EDID to your DVI2USB 3.0. The uploaded
EDID is permanently installed in the DVI2USB 3.0 and the DVI2USB 3.0 will always
share this EDID with the video source.
1. Download an EDID file from the Epiphan web site or obtain an EDID file from
Epiphan Support.
2. Disconnect the DVI cable from the DVI2USB 3.0. Keep the DVI2USB 3.0
connected to the video capture workstation USB port.
3. From the video capture application Tools menu, select Upload EDID and select
the EDID file.
4. Wait for the EDID update to complete. This can take several minutes.
5. Reconnect the DVI cable to the DVI2USB 3.0.
6. Set the required resolution on the video source. You may need to disable/re-
enable or reset the DVI port.
14.1.3 An EDID example
In this example, a user was viewing the video output from a system using a flat panel
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 system changed to
produce video images at a screen resolution of 720x400.
It turned out that the video source preferred to output 720x400, but because the
original monitor did not support 720x400, the video source was forced to operate at
640x480. The DVI2USB 3.0 supported 720x400 so the system changed to this
resolution when the DVI2USB 3.0 was connected to it.
The user wanted to return the video source to operating at 640x480 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 720x400. When the user