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Symptom
No signal
No signal
No signal
Unusual colors
Rolling signal
Horizontal
video bars
No control
Background
pattern
Causes
No continuity in
video link
Power off
Improper
connection or
swapped pairs
Improper
grounding or
cable type
Simultaneous
RS232 and IR
EMI interference Identify possible radiating frequency
Troubleshooting
Possible Solutions
Verify cable continuity between pairs of
baluns.
Verify the max distance has not been
exceeded.
Verify the audio, video, and control
cables between the equipment and
hardware are connected and pass signal.
Check power supplies of video
equipment.
Verify the LEDs on both the send and
receive units are illuminated.
Check that baluns are connected to
correct video inputs and outputs.
Verify both ends of the twisted pair
cable conform to the EIA 568B crimp
pattern.
Verify the source and destination
devices are grounded. Different
electrical circuits may cause a voltage
differential on the building's electrical
ground plain. The video display or
source deceive may need to be
grounded.
Verify only IR or RS232 are being used.
sources (i.e.; wireless LANs, switching
power supplies) and isolate them.
Replace any unshielded twisted pair
cable with shielded twisted pair cable.
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