Muxlab CCTV Mini Balun - Manual (Page 2)

© MuxLab Inc. 2000 - 2008
7. Power-on the CCTV equipment and check the picture quality. The video should be
clear and sharp within the maximum specified distances. The following diagram shows
a typical application.
Troubleshooting
The following table describes some of the symptoms, probable causes and possible
solutions in respect to the installation of the CCTV Balun. If you still cannot
diagnose the problem, please call MuxLab Technical Support at (514) 905-0588 or
toll-free in North America at 877-689-5228.
Symptom Probable Causes Possible Solutions
Poor picture quality,
distortion,
interference, etc. 1. EMI interference. Check that wiring is not too close to
transformers and ballasts.
2. Wires reversed on
signal pair on one side
Make sure that the wires on the signal
pair are not reversed on one side.
3. Split pair Check if the UTP pairs are split and
correct. Each signal pair must be
twisted.
No video image 1. Power-off. Check power supplies of CCTV
equipment.
2. Wrong pin
configuration
Check pin configuration and verify
straight-through wiring.
3. Defective CCTV
Balun
Change CCTV baluns for another
pair.
Picture faded or
weak 1. Exceeded distance
specifications
Check DC loop resistance and verify
if distance spec is exceeded. Reduce
cable length or eliminate high-loss
components.
2. Lower grade UTP
cable is introducing
high signal losses.
Use signal repeater for extended
distance.
Replace cable by higher grade.
Horizontal bars
or lines moving
up or down the
screen 1. Possible ground
loop.
Lift AC ground or install ground loop
blocker. Alternatively, install
MuxLab’s CCTV Ground Loop
Isolation/Pass-Thru Balun (500132) at
the DVR or camera.