Tvone C3-440, Руководство пользователя

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196 Resolution Editor Guide
Editing Vertical Back Porch Property from Command Line
Learn how to set the timing interval for the Vertical Back Porch for a Custom Resolution via
the command line.
Command
Resources.Resolutions.Resolution1000.VBackPorch
Description
The Vertical Back Porch is the gap between end of the Vertical Sync Pulse and the
beginning of the Active Video in pixels.
Example
Resources.Resolutions.Resolution1000.VBackPorch = 15
Resources.Resolutions.Resolution1000.VBackPorch = 15
!Done Resources.Resolutions.Resolution1000.VBackPorch = 15
Default
0
Notes
The valid range of values is 1 to 100.
For a valid Custom Resolution, you must configure this property to a value within the valid
range.
To calculate the
Vertical Front Porch , Vertical Sync Pulse and Vertical Back Porch for
an interlaced resolution, double the value of the even field. Interlacing standards are
designed this way in order to present the values in a similar format to Progressive values.
Interlaced Custom Resolutions require that the Vertical Back Porch is twice the even field.
For example, a
Vertical Back Porch of 69 gives:
Odd field: 34
Even field: 34.5
In the CORIOdiscover Resolution Editor, the
Pixel Clock is not affected by any changes to
the Vertical Back Porch . However, the Vertical Frequency read-only field varies based on
Vertical Back Porch changes.