Hall Research UV232A-8S - Manual (Page 11)

4 or 8 Channel Splitter PC Video, Audio & RS232 over Twisted-Pair Receivers
9
3. Configuration & Operation
3.1 Why Cable Compensation?
All cables attenuate (reduce) the high-frequency components of the video signal that
is being transmitted. The longer the cable, the more signal loss. If not compensated
for, this signal loss will result in blurry and smeared images being displayed.
The image quality depends on the resolution and level of detail in the image. The
Hall Research URA series of receivers have one of the most precise and complex
equalization techniques in the industry and allow full recovery of the original signal’s
bandwidth.
It is best to make this adjustment using a test pattern that is designed to depict and
exaggerate this effect.
Some Hall Research senders may have a built-in test pattern generator. If your
sender unit is equipped with this feature, simply activate it on the sender. Otherwise,
you can connect a PC to the source and display a test pattern. A sample test pattern
is available at
http://www.hallresearch.com/skew.htm to assist in the adjustment of
the compensation and to evaluate the amount of color skew in the installation.
The table below lists the recommended maximum distances from sender to the
receiver depending on the resolution used.
Refresh Rate
60 Hz 75 Hz
800x600 1000 ft 1000 ft
1024x768 1000 ft 850 ft
1280x1024 850 ft 750 ft
Resolution
1920x1200 750 ft 700 ft
Table 3 -
Recommended maximum
CATx cable length from
sender to the receiver