Operation; Input Selection; Aspect Ratio Control / Squeeze Mode; Picture Controls - Silicon Image Scan pro Manual Del Usuario

Operation

Figure 2
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1. Power 4. Input 3 7. Brightness
2. Film 5. Input 2 8. Contrast
3. Priority 6. Input 1 9. Saturation (Color)

Input Selection

The iScan Pro has been designed to detect
which of the three possible input devices are
turned on and are generating video signals
and then to automatically switch to this
input. With this capability, you can switch
inputs simply by turning one input device on
or by turning another device off.
To improve this functionality we have includ-
ed an input priority switch labeled "priority",
found on the front of the iScan Pro, which
specifies which of the inputs to use when
there are multiple active inputs. This can be
used if there is one particular input that you
prefer to leave on at all times. For instance,
you may wish to leave your VCR on but
would like the iScan Pro to switch to your
DVD player whenever it is on. In this case,
you would set your Input Priority switch to
the number of the input that is connected to
your DVD player. Since the VCR is always
on, it will be selected when neither of the
other two inputs are active. When the DVD
player is turned on, the iScan Pro will auto-
matically switch to that input.
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10. Hue (Tint) 13. Normal/
11. Sharpness Squeeze Mode
12. RGB/YPbPr
The iScan Pro searches for active inputs in
the following order. First it checks the "Input
Priority" switch selection. If no active video
signal is found on the input indicated by the
switch selection, it checks the Component
Video input, then the S-Video input and then
the Composite video input. This search is
continuous so if the iScan Pro is processing
an input which becomes inactive, the iScan
Pro will then automatically switch to the
next active input. Likewise, if the iScan Pro
is processing video from one input when a
higher priority input becomes active, it will
automatically switch to using the new input.
If there is no active input, the iScan Pro will
slowly flash between the three inputs. After
a while, the iScan Pro will turn off all of the
indicators on the front panel except for
Power which will turn from green to red.
This indicates that the iScan Pro is in Sleep
mode and is consuming less power. As soon
as any video input becomes active, the
iScan Pro will wake up and begin processing
the input.

Aspect Ratio Control / Squeeze Mode

Most widescreen television sets will provide
a button on the remote control that allows
you to change the aspect ratio of the dis-
played image. This will allow the user to
view normal material (4:3) in a smaller
region in the center of the screen with black
or gray bars to the left and right of the
image. However, some of these sets disable
this control when receiving a high definition
(HDTV) signal or a signal that has been
upconverted. The Squeeze Mode is designed
specifically for these sets.
If you have a widescreen TV, you will be
able to determine the function of the Aspect
Ratio control switch simply by moving it up
and down into the three positions and
watching the output. In the top position,
video material is passed though the iScan
Pro with no change in aspect ratio. This is
perfect for anamorphic DVDs but will cause
regular 4:3 pan-and-scan or 4:3 letterboxed
material to look too wide, with all of the
people and buildings appearing too short
and too fat.
The bottom two settings will correct this
aspect ratio problem. The only difference
between these two settings is that one will
use black bars on the sides of the image
whereas the other will use gray bars. We
strongly recommend that you use the gray
bars if your display is a CRT or plasma
based unit. If you were to use the black bars
instead, you are guaranteed to cause some
display burn-in over time. This is an effect
that is caused by the phosphor or plasma
slowly wearing out in the center of the
screen (where the video is) at a different
rate than on the edges (where the black
bars are). This would leave a visible dark
area in the center when you return to
widescreen mode.
Since nearly all televisions sold are CRT-
based, it is likely that the gray bar setting is
the safest for your display. However, LCD
and DLP-based projectors and displays do
not suffer from burn-in so it is safe to use
the black bar setting.

Picture Controls

The iScan Pro provides the ability to adjust
five picture control settings. These are:
Brightness
Contrast
Saturation (Color)
Hue (Tint)
Sharpness
To adjust a picture control setting, turn the
potentiometer clockwise to increase the
setting or counter clockwise to decrease the
setting. This is shown in figure 2.
The iScan Pro is shipped with picture control
settings at nominal.
Please note that Sharpness and Hue
functions are not applicable to the
component input.

Film Mode Indicator

The blue "film" indicator on the iScan Pro
front panel turns on whenever the iScan Pro
has recognized a video sequence that was
originally captured from film. The indicator
may turn off if the video sequence is film is
there is very little motion.
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