Muxlab S-Video Hi-Fi 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. Two (2) twisted pairs are required for
S-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 S-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 S-Video/Hi-Fi Balun 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:
Video Symptom Probable Cause Possible Solutions
No continuity in video
link
Verify cable continuity between pairs of baluns.
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 and 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 Symptoms 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 S-Video/Hi-Fi 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.
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).