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© MuxLab Inc.
The following chart describes some of the problem symptoms, the probable causes and
possible solutions. If the information below does not solve the problem, please contact
MuxLab Technical Support at 877-689-5228 (North America) or at (+1) 514 905-0588
(International) or via e-mail at videoease@muxlab.com.
Picture
Probable Causes
No video image
Poor image quality,
distortions, interference
Picture loses color, faded
or weak
No power or intermittent
power at camera
PTZ controls not
responding
When contacting your nearest MuxLab dealer or MuxLab Technical Support please have
the following information ready:
• Unit model number.
• Cabling lay-out. Include model of
camera and DVR used, power supply
voltage, camera wattage, cable length
and type.
•
Power-off.
•
Wrong pin
configuration
•
Defective CCTV
Balun
•
EMI interference
•
Wires reversed on
signal pair on one
side
•
Split pair
•
Exceeded distance
specifications
•
Lower grade UTP
cable is introducing
high losses
•
Wires reversed on
signal pair on one
side
•
Split pair
•
Lower grade UTP
cable is introducing
high signal losses.
•
Wrong pin
configuration.
•
Distance exceeded
•
Wrong pin config
Page 14
Passive CCTV Hub Plus Installation Guide
Troubleshooting
Possible Solutions
•
Check power supplies of CCTV
equipment. Check power supply fuse.
•
Check pin configuration and verify
straight-through wiring.
•
Change CCTV baluns for another pair.
•
Check that wiring is not too close to
transformers and lighting ballasts
•
Make sure that the wires on the signal
pair are not reversed on one side.
•
Check if the UTP pairs are correct (not
split)
•
Check DC loop resistance and verify if
distance spec is exceeded
•
Reduce cable length or eliminate high-
loss components
•
Replace cable by higher grade
•
Make sure that the wires on the signal
pair are not reversed on one side.
•
Check if the UTP pairs are split and
correct. Each signal pair must be twisted.
•
Use signal repeater for extended distance
or replace cable by higher grade.
•
Check wiring
•
Verify distance specifications for remote
power. Move power closer to camera.
•
Check wiring.
• Description of problem.
• List of tests performed.
4.
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