Epiphan VGA2USB Pro User Manual
Page 134
18. Advanced topics
About EDID
Page 134
Epiphan Frame Grabber
Figure 35:Frame Grabber EDID and video source
Usually you would operate an Epiphan Frame Grabber using the
factory installed default EDID. However, in some cases when you
connect an Epiphan Frame Grabber 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 Frame Grabber. The EDID
information in the file restricts the video signal that can be
accepted by the Frame Grabber. For example, you can upload a
custom EDID file to your Frame Grabber that reports that the
Frame Grabber only operates at 1040x768. When the video source
reads the EDID from the Frame Grabber, 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 frame
grabbers from the
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 Frame
Grabber. This page also contains default EDIDs for each
DVI2USB Frame Grabber. You can use the custom EDIDs to
restrict the video resolution of the video source connected to the
DVI2USB Frame Grabber. You can use the default EDIDs to
return your DVI2USB Frame Grabber to normal operation.
Video Capture
Workstation
Video Source
Read by
video source
Uploaded to
Frame Grabber
Epiphan DVI
Frame Grabber
Video
cable
EDID