Vizio VM60P HDTV10A Service Manual page 56

ADC capture window
In the horizontal direction, the capture window is defined in IP_CLKs (equivalent to a pixel
count). In the vertical direction, it is defined in lines.
All the parameters beginning with "Source" are programmed FLI8668 registers values. Note
that the Input Vertical Total is determined solely by the input and is not a programmable
parameter.
Figure 8-11 ADC Capture Window
The Reference Point marks the leading edge of the first internal HSYNC following the leading
edge of an internal VSYNC. Both the internal HSYNC and the internal VSYNC are derived
from external HSYNC and VSYNC inputs.
Horizontal parameters are defined in terms of single-pixel increments relative to the internal
horizontal sync. Vertical parameters are defined in terms of single-line increments relative to
the internal vertical sync.
For interlaced inputs, the FLI8668 may be programmed to automatically determine the field
type (even or odd) from the VSYNC/HSYNC relative timing. See Input Format Measurement,
Section Input Format Measurement (IFM).
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