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18
8990ARC Instruction Manual
Configuration
The output will change according to the last valid command from the
highest priority enabled control. For example, consider a case where the
Video Index is enabled and its input is invalid. The user sets the conversion
mode with the control panel to Bypass which passes the Video Index signal
through to the output. The Video Index input changes to valid and sets the
conversion mode to Letterbox. The Video Index then becomes invalid
again.
The output will remain at Letterbox until another valid enabled control
changes the conversion mode. It will not revert back to the setting set with
the control panel.
Tilt/Pan Control
Tilt and pan controls for left and right, centering, and top and bottom posi-
tioning are provided depending on the Conversion mode selected.
Video and VBI Line Handling
The module handles lines in the video input differently depending on
whether the line is an active video or a vertical interval line.
Vertical interval lines (lines 1-20/264-283 in 525 or lines 624-23/311-336 in
625) are either passed to the output unchanged or blanked by the VBI
Bypass circuit. This selection is made with the VANC Data control.
Active video lines (lines 21-263/284-525 in 525 or lines 24-310/337-623 in
625) are processed through a scaling circuit. Depending on the mode of the
module and the line number, they are either passed to the output, replaced
with a scaled version of part of the input active video, or replaced with
black fill.
If, for example, the scaling circuit is magnifying the video vertically, all
active lines are replaced with scaled lines and the portion of the scaled
video that doesn’t fit in to the active space is discarded.
If the scaling circuit is reducing the video vertically, all of the scaled video
is displayed on the output and active lines that are not covered by the
scaled video are blanked.
When information such as closed captioning data is present on one of the
first three active video lines, (lines 21/284, 22/285, and 23/286 in 525 or
lines 24/337, 25/338, and 26/339 in 625), these lines can be designated as
data lines and will be treated as part of the vertical interval passing the data
to the output when the VANC Data control is set to
Pass
.
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Страница 6: ...6 8990ARC Instruction Manual Preface ...
Страница 37: ...8990ARC Instruction Manual 37 Configuration Figure 14 Settings Web Page for 4 3 Output Format ...
Страница 41: ...8990ARC Instruction Manual 41 Configuration Figure 18 8990ARC Slot Config Web Page ...
Страница 52: ...52 8990ARC Instruction Manual Functional Description ...
Страница 56: ...56 8990ARC Instruction Manual Index ...