Compact CAT5 Audio/Video Splitters and Receiver
10
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 tolerate up to 5 v peak-to-peak ground
noise between the two locations, but no more. If you suspect a
grounding problem a call to an electrician may be warranted.
3. Shaking image or periodically blanking monitor
Although CAT5 cable uses twisted pairs to transmit the signals from
the splitter to the receivers to reduce the amount of EMI coupled noise
from other external sources, a strong electromagnetic noise field can
cause instability in the signal.
Usual sources of this form of noise coupling are high current AC lines
or other high-density 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 CAT5 cables. Note that
separating the CAT5 cable from the EMI source by a few inches is
often sufficient to eliminate this problem.
4. The PC does not recognize a Plug-and-Play monitor
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.
