The DVI-D Input dialog displays the resolution of the current mode for reference and allows the timings
of the EDID preferred mode to be edited. To populate the EDID timings with the current timings click on
the Copy Timings button.
The dialog supports standard timing formulae such as:
• VESA CVT
• VESA CVT Reduced Blanking
• SMPTE (for HD modes)
• VESA GTF
• Custom
Selecting Auto from the drop down list will typically default to the VESA CVT algorithm which best
matches typical standard VESA output modes. However, to minimise dot clocks and hence maximise
DVI cable lengths, the CVT Reduced Blanking is recommended.
Selecting Custom allows the timing parameters to be edited. It should be noted that you will need to
select between denition of Pixel Clock or Vertical Refresh since these are mutually exclusive
parameters.
Once edited, clicking OK writes the preferred mode into the EDID but may not normally aect the input
mode that is being captured. It may be necessary to force the graphics device in the host machine to
detect the new modes, this can be done by selecting Detect on the Screen Resolutions dialog box (Win-
dows® 7) or by disconnecting the source from the x4 and reconnecting.
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Fig.9