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19 18/10/2010
The DVI-D Input dialog displays the resolution of the current mode for reference and allows
the timings of the EDID prefered mode to be edited. The dialog supports standard timing
formulae such as:
•
VESA CVT
•
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 definition of Pixel Clock or Vertical Refresh since these are mutually
excusive parameters.
Once edited, clicking OK writes the prefered mode into the EDID but may not normally affect
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 (Windows® 7) or by disconnecting the souce from the x4 and
reconnecting.
All modifications to the input settings can be save as a .vqs file, removing the requirement to
input the same settings again. To save the settings select the
Save… command in the File
menu. To open a saved .vqs file select the Open… command.