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ACS-2048 • User’s Guide
49
4. Operation
Using the Main Menu
Select
Auto Config
to perform an automatic input configuration on the selected
source.
•
Sampling
— select this function to change the sampling for the selected input.
Available values are:
Oversample
and
1:1
(default). Please note:
~
When
1:1 Sampling
is selected, the system provides pixel-for-pixel
sampling, and generally better image quality.
~
When
Oversample
is selected, the system performs multiple samples
for every pixel, with a resulting “softer” image.
~
Oversample
is only available for RGB and YP
b
P
r
analog inputs.
~
All other input types have defined sample clocks that are inherently
1:1
.
If the input is set to one of the other types, the value is
[1:1]
.
•
Sample Phase
— This selection is only available when
Sample Mode
is
1:1
and
the input is analog
RGB or YP
b
P
r
. If
Oversample
is selected, the field is hidden.
The sample phase value is initially filled in by the
Auto Config
command, or set to
the default value. You can further fine-tune the image by adjusting the sample
clock phase directly.
~
Adjustment range
: -16 to 15
~
Default
: 0
For all
Horizontal
“active area” fields, all units are measured in pixels:
•
H Total
— adjusts the total pixel count per line. This value cannot be adjusted if
the input type is
DVI
/
SDI
.
•
H Position
— adjusts the offset of start of active area from H sync.
•
H Active
— sets the size of the active area.
For all
Vertical
“active area” fields, all unit are measured in lines.
•
V Total
— indicates the total line count per frame. This value is measured, and
can never be adjusted. Its value will always be shown in brackets.
•
V Position
— sets the offset of start of active area from V sync.
•
V Active
— sets the size of the active area.
Note
In this mode, for the selected image, the system finds the first
and last pixel on each edge, and ensures (to the best
possible extent) that the entire image is visible. In addition, if
the input is analog, the system automatically phases the input
to determine the correct sampling phase.
Tip
Ensure that there are non-black pixels around the extreme
edges of your active video, in order for the image to be
properly sized by the
Auto Config
function. For example, if
you use a Windows desktop with a high luminance
background, the
Auto Config
function will be accurate. If, on
the other hand, you use a desktop image with a black border,
the image will not be properly sized.