Muxlab Stereo AV-IR User Manual

Specifications

Environment
Devices

Transmission

Bandwidth

Impedance
Max. Input
Insertion Loss

Return Loss
Common Mode
Rejection Ratio
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). Line level analog audio. IR Remote.
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 N/A
Greater than 40 dB over the frequency range N/A

2,200 ft (670 m)
IR: Please refer to IR vendor specifications

Video: Pins 7(R) & 8(T)
IR Pass-Thru: Pins 4(R) & 5(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
500048: Three RCA-M connectors: Video (yellow) & stereo audio (red, white)
500049: Three RCA-F connectors: Video (yellow) & stereo audio (red, white)
One (1) 2-pole terminal block for IR emitter pass-through
One (1) RJ45 for Cat 5E/6
Operating: 0º to 55ºC
Storage: -20º to 85ºC
Humidity: Up to 95% non-condensing
Fire retardant plastic
500048: 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
500049: 2.40” x 2.25” x 1.00” (6.10 x 5.72 x 2.54 cm)

3.1 oz (89 g)
Lifetime
500048 Stereo AV/IR Pass-Thru Balun, M
500049 Stereo AV/IR Pass-Thru Balun, F

distance range

Less than 2 dB per pair over the
frequency range

3,250 ft (990 m)

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

Stereo AV / IR Pass-Thru Balun

500048, 500049

Quick Installation Guide

Overview

The Stereo AV/IR Pass-Thru Balun (500048, 500049) allows one (1) composite video,
one (1) stereo audio and one (1) IR emitter signal to be transmitted via a single Cat 5E/6
cable in a point-to-point connection. The Stereo AV/IR Pass-Thru Balun features full
audio bandwidth response for high fidelity applications and features built-in color-coded
cable leads for ease of installation. The Stereo AV/IR Pass-Thru Balun also works in
conjunction with third party IR Remote Control equipment. This enables the IR Emitter
to connect to the IR control module using the same Cat 5E/6 cable as video and audio,
allowing for more cost-efficient cabling. Some 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. 94-000645-B SE-000646-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. If you still
cannot diagnose the problem, please call MuxLab Customer Technical Support at 877­689-5228 (toll-free in North America) or ([phone] (International).

Video Symptom Probable Cause Possible Solutions

No continuity in video
link
Power off Check power supplies of video equipment.No video
Improper connection

Unusual colors Reversed polarity Check wiring & ensure straight-through polarity

Background pattern EMI interference

Smearing Exceeded distance

Weak contrast

Image not stable

Horizontal bars
moving slowly

Snowy picture Distance is near limit

and/or swapped pair

Exceeded distance
Unusual link

attenuation
Defective link or
equipment
Substantial crosstalk
between multiple video
sources

Verify cable continuity between balun pairs.

Check that baluns are connected to correct video
inputs and outputs.

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

© MuxLab Inc.

IR Symptom Probable Cause Possible Solutions

No IR signal

No continuity in IR pair Check wiring
IR equipment malfunction Check IR equipment with direct connection