NTI EXTENDEX Extenders
13
VIDEO QUALITY
Automatic Video Quality Adjustment
(see chart on page 1)
Video quality adjustment is done automatically to assure the image is as clear as possible.
Note: When the cable is longer than 300 feet some colored lines can be seen at the black-to-white transitions. This is a
normal behavior and is caused by the different twisting rates of each pair of wires in the CAT5 cable.
Manual Video Quality Adjustment
(see chart on page 1)
It is possible that on initial startup the image on the monitor will not be as crisp as the image normally is. This is due to the
frequency characteristics of the CAT5 cable. It may be necessary to press the "+" or "-" buttons (see Fig. 13) until the image is
crisp and clear. Press the "+" button if the image is not crisp and clear enough. Press the "-" button if the image has been over-
corrected (such that horizontal lines appear to trail or shadow at the edge of an open window). A momentary press of either
button will make a minor change in the image. If either button is pressed and held, the changes made will be gradual and
continuous. Ultimately, the image quality should improve to a satisfactory level. Once the adjustment is made, it should not be
necessary to change it again, as the new settings are stored in memory and become the default settings with each startup.
Note: When the cable is longer than 300 feet some colored lines can be seen at the black-to-white transitions. This is a
normal behavior and is caused by the different twisting rates of each pair of wires in the CAT5 cable.
Figure 13- Buttons for video quality adjustment
If the image still lacks definition, configuration adjustments may need to be made to the attached video display equipment. This is
a problem most often seen in LCD displays. Check the manual for the equipment having the poor display and look for an "auto-
adjust" or "auto-configure" feature. Once this is done, you may need to repeat the Video Quality Adjustment procedure
described above to achieve the best image.
Press using pen or other
pointed object to improve
screen image
Side view of Remote Unit with manual
video quality adjustment buttons