Muxlab Stereo AV/IR Pass-Thru Balun - Manual (Page 2)

© MuxLab Inc.
Installation
One (1) pair of baluns is needed to complete one composite stereo audio-video
connection via Cat 5E/6 twisted pair. To install the baluns, perform the following steps:
1. Identify the pin configuration of the baluns. One (1) twisted pair is required for
composite video and two (2) twisted pairs are required for stereo analog audio. The
pin configuration follows the EIA/TIA 568A/B standard. The Stereo Hi-Fi Video
Balun is reverse polarity sensitive. Please ensure that wiring is straight-through
(Ring to Ring, Tip to Tip).
2. Plug one (1) balun into the composite video/stereo audio output of the video source
according to the color code of the RCA cable leads.
3. Plug the second balun into the composite video/stereo audio input of the video
screen or receiver at the remote end.
4. Complete the connection between the two baluns, using standard Cat 5E/6 twisted
pair cable and connecting hardware, terminated on RJ45 plugs at both ends. Ensure
that there are no split pairs or taps.
5. Power-on the audio-video equipment. Check the image quality and refer to the
troubleshooting table below if the image quality is unsatisfactory. The following
diagram shows a typical installation.
Troubleshooting
The following tables describe some of the symptoms, probable causes and possible
solutions in respect to the installation of the Stereo Hi-Fi Video Balun. If you still
cannot diagnose the problem, please call MuxLab Customer Technical Support at 877-
689-5228 (toll-free in North America) or (+1) 514-905-0588 (International).
Video Symptom Probable Cause Possible Solutions
No continuity in video
link
Verify cable continuity between balun pairs.
Power off Check power supplies of video equipment. No video
Improper connection
and/or swapped pair Check that baluns are connected to correct video
inputs and outputs.
Unusual colors Reversed polarity Check wiring & ensure straight-through polarity
Background pattern EMI interference
Identify possible radiating frequency sources
(i.e., wireless LANs, switching power supplies).
Try to isolate them from the video connection.
Use shielded twisted pair grounded at both ends.
Smearing Exceeded distance
Verify cable grade. Use higher grade cable if
necessary.
Exceeded distance
Verify cable grade. Use higher grade cable if
necessary. Increase contrast on monitor.
Weak contrast
Unusual link
attenuation Verify cable distance using ohmmeter or cable
tester.
Image not stable
Defective link or
equipment
Verify video equipment interface integrity.
Horizontal bars
moving slowly
Substantial crosstalk
between multiple video
sources Consecutively turn off other video sources to
determine which video source is the cause of
interference.
Snowy picture Distance is near limit
Verify cable grade. Use higher grade cable if
necessary. Reduce color intensity at monitor.
Audio Symptom Probable Causes Possible Solutions
EMI interference
Check that wiring is not too close to transformers
and ballasts.
Poor audio quality
Split pair
Ensure that the UTP pairs are not split and that
each pair of wires is twisted.
No power Check your audio system for power.
Open circuit Check wiring to ensure continuity.
No audio
Defective balun
Change Stereo Hi-Fi/Video Baluns for another
pair.
Audio phase
cancellation
Reversed wires Check for straight-through wiring.
Audio weak
Distance specifications
exceeded
Check DC loop resistance and verify if distance
spec is exceeded. Reduce cable length or
eliminate high-loss components.
IR Symptom Probable Cause Possible Solutions
No continuity in IR pair Check wiring
No IR signal
IR equipment malfunction Check IR equipment with direct connection