Extron Electronics IN2200RS - Manual (Page 10)

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IN2200RS Operation Manual - V1.1 01/03/2001 ©2001 - INLINE, Inc.
Operation
INPUT
The Input Button can be used to select Input 1 or Input 2. Each time the button is pressed, the
unit toggles back and forth between the two inputs, and the appropriate front panel LED indicator
illu-minates to show the current channel selection. Unique gain, sharpness, horizontal position
and vertical position settings are automatically stored for each input and recalled each time the
input is selected.
The non-selected channel is terminated into 75 Ohms. The interface automatically returns to the
last selected channel if power is removed and reapplied to the unit. Input channels may also be
selected remotely by using a third-party controller.
LCD DISPLAY
The LCD displays the horizontal and vertical scan rates and provides adjustment status feedback.
When an adjustment is being made, the LCD shows a description of the function and a bar graph
to indicate the current location within the adjustment range. The LCD remains in this state for
several seconds after the last change and then reverts to the horizontal and vertical scan rate
display.
GAIN
Gain (
¾ and ¿) Buttons adjust the output voltage of the red, green, and blue outputs
simultaneously (ensuring that gray scale is maintained), and may be used to compensate for
signal loss due to long cable runs. The gain adjustment range is 0 in the minimum position (no
video information) and 1.3 in the maximum position (30% increase). The factory default setting
is 1.0 (unity gain). Operators can press and release the button for small changes or press and hold
for major changes. The Gain Control can also be used to fade the image to black.
SHARPNESS
Sharp (
¾ and ¿) Buttons provide variable high-frequency equalization that can compensate for
signal loss due to long output cable runs. Careful optimization of the sharpness control will result
in a greatly enhanced image with increased clarity and edge detail. The amount of high
frequency boost required for each display system will vary depending on the length and
bandwidth performance of the video output cables, and, to a lesser extent, the resolution and
frequency of the input signal. When using short output cables, the sharpness control should
usually be placed at the minimum setting to avoid over-peaking.
Operators can press and release the sharpness control button for subtle changes or press and hold
for major adjustments. The factory default setting is minimum (no sharpness / peaking
enhancement). The following guidelines are useful in selecting the optimal sharpness / peaking
setting:
If the image is soft and / or fine details in the picture lack clarity:
The sharpness is probably set too low. Increase the sharpness control setting.
If a white, ghosted image appears to the right side of the lines / characters:
The sharpness is probably set too high (over-peaked). Decrease the sharpness control
setting.