Muxlab LongReach II Active CCTV Receiver Hub - Manual (Page 17)

© MuxLab. LongReach II Active CCTV Receiver Hub Installation Guide
Page 17
4.
Troubleshooting
The following table describes some of problem symptoms,
probable causes, and possible solutions. If the information below
does not solve the problem, the technical support contact
information can be found at the end of this section.
Picture Green LED Red LED Probable Cause Possible Solutions
OFF OFF • Power off
• Check power supplies of CCTV
equipment.
Dim OFF
• Wrong pin
configuration
• Check pin configuration and verify
straight-thru wiring. No image
Dim OFF
• Fuse tripped due to
power surge
• Turn power off. Wait 2-3 minutes.
Turn power on. Investigate cause of
power surge.
Picture distorted
Bright or
blinking
OFF
• EMI interference
• Split 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).
Picture loses
color
Bright OFF
• Exceeded distance
specifications
• Lower grade UTP
cable is introducing
high losses
• Check DC loop resistance and
verify if distance spec is exceeded.
• Reduce cable length or eliminate
high-loss components
• Replace cable by one of higher
grade.
Picture contains
low frequency
background
noise (wood
grain pattern)
Bright OFF • Poor grounding
• Connect ground of LongReach II
Hub to true building ground.
Image
occasionally
fading,
synchronization
not perfect
Bright
ON or
blinking
• Ground Loop Fault
(ground differential
voltage between
transmit & receive
ends exceeds 2
VDC or AC)
• Isolate remote camera power
entry and enclosure from local
ground.
• Ensure that camera is secured
against static discharges (i.e., is
inside a metal, grounded cage).