Muxlab Stereo Hi-Fi User Manual

Specifications

Environment
Devices

Transmission

Bandwidth

Impedance
Max. Input
Insertion Loss

Return Loss

Common Mode Rejection
Ratio (CMRR)
Max. Distance via
Cat 5E/6 UTP/STP Cable
Pin Configuration (RJ45)

Cable:
Cat 5E/6 UTP/STP

Connectors

Temperature

Enclosure
Dimensions

Weight
Warranty
Order Information

Composite video (NTSC, PAL, SECAM) equipment
DVD players, VCR, satellite receivers, MPEG players, laptops,
notebooks, monitors, LCD projectors, CCD cameras, video switchers,
sequencers, digital video servers, video multiplexers, video splitters,
video converters and other composite video equipment.
Transparent to the user

Composite Video Audio

DC to 6 MHz 20 Hz to 20 kHz over the

75 ohms 600 ohms min.

1.1 Vp-p 1.1 Vp-p
Less than 2 dB per pair over the
frequency range from DC to 6 MHz
Better than 15 dB over the frequency
range
Greater than 40 dB over the
frequency range
2,200 ft (670 m) 3,250 ft (990 m)

Video: Pins 7(R) & 8(T)

Reverse Polarity Sensitive

24 AWG or lower solid copper twisted pair wire
Impedance: 100 ohms at 1 MHz
Maximum capacitance: 20 pf/ft
Attenuation: 6.6 dB/1,000 ft at 1 MHz
One (1) RCA-M for video (yellow)
Two (2) RCA-M for stereo audio (red, white)
One (1) RJ45 for Cat 5E/6
Operating: 0º to 55º C
Storage:- 20º to 85º C
Humidity: Up to 95% non-condensing
Fire retardant plastic

2.40” x 2.25” x 1.00” (6.10 x 5.72 x 2.54 cm) plus 6” (15 cm ) cable
leads for video and stereo audio

3.1 oz (89 g)
Lifetime
500039 Stereo Hi-Fi/Video Balun

distance range

Less than 2 dB per pair over the
frequency range
N/A

N/A

Audio 1: Pins 1(R) & 2(T)
Audio 2: Pins 3(R) & 6(T)

Stereo Hi-Fi / Video Balun

500039

Quick Installation Guide

Overview

The Stereo Hi-Fi/Video Balun (500039) allows a single composite video signal to be
transmitted via an unshielded twisted pair (UTP) cable up to 2,200 ft (670m) in a point­to-point connection. The Stereo Hi-Fi/Video Balun features full audio bandwidth
response for high fidelity applications and features built-in color-coded cable leads for
ease of installation. The Stereo Hi-Fi/Video Balun also works in conjunction with
MuxLab’s Audio-Video Distribution Hub (500200) to allow composite video
programming to be distributed via UTP. Applications include: Classroom video
distribution, commercial and home audio/video systems, hospital video training, video
conferencing, and video kiosks.

8495 Dalton Road, Mount Royal, Quebec, Canada. H4T 1V5

Tel: [phone] Fax: [phone]

Toll Free (North America): [phone]

E-mail: [e-mail] URL: www.muxlab.com

© MuxLab Inc. 94-000393-B SE-000423-B

Installation

Troubleshooting

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.

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
Power off Check power supplies of video equipment.No video
Improper connection
and/or swapped pair

Unusual colors Reversed polarity

Background pattern EMI interference

Smearing Exceeded distance

Weak contrast

Image not stable

Horizontal bars
moving slowly

Snowy picture Distance is near limit

Exceeded distance

Unusual link attenuation
Defective link or

equipment
Substantial crosstalk
between multiple video
sources

Verify cable continuity between pairs of
baluns.

Check that baluns are connected to correct
video inputs and outputs.
Check wiring and ensure straight-through
polarity

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.

Verify cable grade. Use higher grade cable
if necessary.
Verify cable grade. Use higher grade cable
if necessary. Increase contrast on monitor.
Verify cable distance using ohmmeter or
cable tester.

Verify video equipment interface integrity.
Consecutively turn off other video sources

to determine which video source is the
cause of interference.
Verify cable grade. Use higher grade cable
if necessary. Reduce color intensity at
monitor.

Audio Symptom Probable Causes Possible Solutions

Check that wiring is not too close to
transformers and ballasts.
Ensure that the UTP pairs are not split and
that each pair of wires is twisted.

Change Stereo Hi-Fi/Video Baluns for
another pair.

Check DC loop resistance and verify if
distance spec is exceeded. Reduce cable
length or eliminate high-loss components.

Poor audio quality

No audio

Audio phase
cancellation

Audio weak

EMI interference

Split pair
No power Check your audio system for power.

Open circuit Check wiring to ensure continuity
Defective balun

Reversed wires Check for straight-through wiring.

Distance specifications
exceeded

If you still cannot diagnose the problem, please call MuxLab Customer Technical
Support at 877-689-5228 (toll-free in North America) or ([phone]
(International).

© MuxLab Inc.