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Compact CAT5 Video/RS232 Splitters and Receivers
have a fuzzy image, try reducing the refresh rate and/or resolution of
the PC.
You can point your browser to
www.hallresearch.com/files/articles/skew_adjust.gif
for an image that
allows you to adjust the compensation and also evaluate the amount of
color skew in your setup. If you determine that you have excessive
color skew, then you must either consider using Zero-Skew UTP cable,
or if that is not possible, use a secondary device whose job is to correct
the color skew (please contact Hall Research for details).
Your splitter has multiple RJ45 output connectors. When a long CAT5
cable is plugged in any of the outputs, the unit expects a receiver unit at
the far end for proper termination. Therefore unplug the un-terminated
CAT5 cables from the splitter unit.
2. Image exhibits steady or rolling horizontal color "hum" bars
This is usually an indication of improper grounding either at the
sending end, the receiving end, or both. Verify that the AC line is
properly wired and that a protective ground (green) wire is established
with NO potential difference between both the sender and receiver
locations. The UTP splitter can handle up to 5 v peak-to-peak ground
noise between the two locations, but no more
3. Shaking image or periodically blanking monitor
Inherently, balanced signal transmission over twisted pair offers good
immunity to EMI coupled noise from other external sources. However,
a strong electromagnetic noise field can cause instability in the signal.
Usual sources are high power AC lines or data and/or control cables
that run adjacent to and parallel with a substantial length of the CAT5
cable. To eliminate this, either place a distance between the CAT5
cables from the splitter and the interfering source, or use shielded
twisted pair (STP) CAT5 cables.
4. The PC does not recognize a PnP monitor (older units only)
If the PC's Operating System is setup to detect a plug-and-play monitor
(usually in Display Properties Advanced Settings), it may have trouble
finding a monitor if no local monitor is hooked up to the splitter. Only
the ID information of the local monitor is passed to the PC. If the PC
does not produce an image due to this, either connect a monitor to the
local VGA output port, or disable the plug-and-play monitor detection
in the PC's operating system.
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