Epiphan VGA2USB Pro - Manual (Page 147)

18. Advanced topics Configuring VGA modes
User Guide Page 147
If the VGA source operates in a non-standard VGA mode, you
can use the custom VGA mode settings to add that non-standard
mode to your Frame Grabber. The Frame Grabber can then
operate in that mode.
Adding custom VGA modes
Add custom VGA modes if you want your Frame Grabber to
operate in a non-standard (custom) VGA mode. You may want to
do this if your video source operates in a non-standard VGA
mode.
You can add as many custom VGA modes as you want for each
Frame Grabber. If you want the Frame Grabber to operate with a
single custom VGA mode, then just add one. You can add more if
you need to operate your Frame Grabber in different custom
VGA modes later.
In most cases the Frame Grabber will automatically select the
custom video mode that most closely matches the VGA output. If
you want to make sure that a the Frame Grabber selects a specific
custom video mode you can unselect all standard VGA modes
and all custom VGA modes except for the one that you want the
Frame Grabber to use.
Usually you would configure a custom VGA mode to match the
custom VGA mode of your VGA source. (So you do not need to
understand the details of custom VGA modes to add them to
your Frame Grabber.) The video capture application does not
provide any guidance in configuring custom VGA modes. You
can enter almost any value in any of the fields. So you need to
know the details about the VGA mode settings of your VGA
source then add that information to the custom VGA mode
configuration.
You can add, edit, and delete custom VGA modes. If you add
multiple custom VGA modes you can select one or more for the
Frame Grabber to use.