Extron Electronics VN-MATRIX User Guide - Manual (Page 79)

VN-MATRIX User Guide Section 4: Advanced Setup Procedures
I458GB issue 6 Page 79
The Cloning Method
An existing video format is cloned by selecting an existing format from the Name list box then clicking
on New Format. A popup dialog will then prompt for a new name. This should be descriptive and
ideally include the resolution and frame rate. Once a user video format has been created the various
timing fields can be edited. New values are typed into the appropriate fields and pressed to commit
the change.
The following graphic indicates the meaning of each term. Only the active video area contains visible
content. The borders are normally on screen but do not show content. The two porches and the sync
together define the 'screen blanking'. This is a non-visible portion of the signal inserted to give a CRT
sufficient time to reset to the start of the next line/frame.
The following relationships must hold:
• TotalPixels = ActivePixels + LeftBorder + RightBorder + HorFrontPorch + HorSync +
HorBackPorch
• TotalLines = ActiveLines + TopBorder + BottomBorder + VertFrontPorch + VertSync +
VertBackPorch
• PixelClock = TotalPixels * TotalLines * FrameRate
• Borders (margins) are typically only used for VGA sized modes
NOTE: It is difficult to create a video format that will be correctly interpreted by monitors without
adhering quite closely to standards. If definitive timing information is not available it is suggested the
following CVT/GTF approach is used.
NOTE: Interlace modes cannot be created by this or the CVT/GTF method at this time.
After a suitable video format has been created and tested it can be saved to non-volatile storage by
clicking on Save Formats. This video format will then be available after a device reset or power cycle.
Unwanted user video formats can be deleted by selecting the video format to delete and clicking on
Delete. A Save Formats operation is then required to delete this format from non-volatile storage.