4 or 8 Channel Splitter PC Video & Power over Twisted-Pair Sender
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4.1 Contacting Hall Research
If you determine that the UV4-S or UV8-S is malfunctioning, do not attempt to repair
the unit instead, contact Hall Research Technical Support at 714-641-6607.
Before you do, make a record of the history of the problem. We will be able to
provide more efficient and accurate assistance if you have a complete
description.
4.2 Shipping and Packaging
If you need to transport or ship your unit:
•
Package it carefully. We recommend that you use the original container.
•
Before you ship the units back to Hall Research for repair or return,
contact us to get a Return Authorization (RMA) number.
4.3 Problem Solving FAQ
1.
Fuzzy, blurry, or ghosting image at remote location
If you have a stable image but it looks somewhat blurry (edges are not
sharp), ensure the cable length for the resolution and refresh rate used is
within the recommended limits. If you still have a fuzzy image, try reducing
the refresh rate and/or resolution of the video source.
2.
Image exhibits steady or rolling horizontal color “hum” bars
This is usually an indication of improper grounding 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 volts peak-to-peak of ground noise between the two
locations, but ground potential differences more than this can show up on
video.
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
sender and the interfering source, or use shielded twisted pair (STP) CAT5
cables.
