HRT Mini-Cat UV-1, Manual

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Miniature VGA over CAT5 Extension System
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4. Troubleshooting
1. Fuzzy, blurry, or ghosting image at remote location
If you have a stable image but it looks somewhat blurry (object or
character edges are not sharp), try to adjust the compensation first.
When the trim-pot is turned fully CCW there is no compensation. As
you turn the pot clockwise you are applying compensation. Look at the
screen and slowly turn the pot clockwise. Notice what happens to the
right of solid horizontal lines (as in figure 3.1). If you still have a fuzzy
image, try reducing first the refresh rate and then the resolution of the
PC.
2. 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 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 separate the Cat 5 cable of Mini-Cat® from 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.
3. 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 the PC does not produce an image due to this,
disable the plug-and-play monitor detection in the PC’s operating
system Display properties.
4. Substituting power supplies
The sender and receiver rely on the power adapter that is supplied with
them. Do not substitute any other power supply or DC power source