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ServSwitch Universal Extender
18
4.3 Video
Calibration
Figures 4-3 and 4-4 show how you can adjust an image to the proper resolution by using the
receiver unit’s front-panel controls.
Select the video channel that you are going to adjust. Start by adjusting the HF gain (all three
LEDs on the receiver unit lit). It’s best to start at the minimum compensation setting. To do
this, either press the Down button repeatedly until the LEDs blink (indicates you are at min), or
simply press both Up and Down buttons simultaneously.
If the cable is long, the black-and-white horizontal lines tend to appear smeared (black smears
as black, and white as white). Press the Up button repeatedly while paying particular attention
after each key press to the area just to the right of the horizontal lines. Your goal is to make
the transition between the horizontal black and white lines and the 50% gray background have
as little smear as possible. Do not over adjust. If you do, some smear comes back, particularly
near the transition but in reverse sense (white lines smear into gray as black and vice versa).
The following images depict the adjustment results as seen on the screen:
Figure 4-3 Test pattern for HF gain and skew adjustments
