Muxlab Stereo PC-Audio Balun User Manual

Specifications

Environment
Devices

Transmission
Bandwidth (3dB point)
(400 O source & 50 kO
receiver)
Maximum Input Level
Insertion Loss per Balun Pair
Common Mode Rejection
(CMMR)
Audio Source Impedance
Audio Receiver Impedance
Impedance Transformation
Ratio
Cable – UTP

Max. Distance – Cat 5 UTP
Connectors

Pin Configuration (RJ45)

Temperature
Enclosure
Dimensions
Weight
Warranty
Order Information

Tel.: [phone] Fax: [phone]

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

94-000638-A SE-000638-A

Line level unbalanced analogue audio
DVD, VCR, camcorders, audio mixers, audio matrix switchers,
audio splitters, audio distribution amplifiers, boosters, satellite
receivers, MPEG players, laptops, stereo audio amplifiers, audio
switchers, integrated TV monitors and other line level audio
equipment
Transparent to the user.
Up to 1,000 ft (305m): 60Hz - 20 kHz
1,000 ft (305m) to 5,000 ft (1.5 km): 100Hz - 20 kHz

1.1Vp-p
Less than 1 dB per pair over the frequency range
Greater than 60 dB @ 1 kHz

Less than 600 ohms
10 k ohms or greater
Single unit: 4:1 (source: line)

24 gauge or lower solid copper twisted pair wire impedance: 100
ohms at 1 MHz. Maximum capacitance: 20 pf/foot.
Attenuation: 6.6 dB/1000 ft at 1 MHz
5,000 ft (1,525m)
Two (2) RCA-M 6” cable leads
One (1) RJ45
Audio 1 (Left): pins 1[R] & 2 [T]
Audio 2 (Right): pins 3 [R] & 6 [T]
Operating: 0º to 55º C. Storage:-20º to 85º C. Humidity: up to 95%
ABS. Fire retardant plastic

1.875” x 1.0” diameter plus 6” audio lead

1.0 oz (28 gms).
Lifetime
500030 Stereo PC-Audio Balun

Toll Free (North America): [phone]

Stereo PC-Audio Balun (500030)

Quick Installation Guide

Introduction

The VideoEase Stereo PC-Audio Balun (500030) allows unbalanced line level stereo
audio to be transmitted up to 5,000 ft (1.5km) via unshielded copper twisted pair (UTP)
in a point-to-point connection. The product is designed for mid-range audio applications.
Used in pairs, the Stereo PC-Audio Balun eliminates costly and bulky audio cable,
allowing audio equipment to be connected or moved within a structured cabling
environment. The 500030 also works in conjunction with other MuxLab audio-video
products including the 500001, 500012, 500019, 500027 and 500200 for a more
complete cabling solution. Applications include; audio distribution, custom residential
systems and intercom systems.

Installation

To install the Stereo PC-Audio Baluns, perform the following steps:

1. One Stereo PC-Audio Balun is required for the PC stereo output.

2. Identify the pin configuration of the baluns. Two (2) twisted pairs are required

as shown in the following diagram.

© MuxLab Inc.

Note: The Stereo PC-Audio Balun is phase polarity sensitive. Therefore, in order to
achieve full stereo audio quality, please ensure that the wiring is straight-through
and according to EIA568 (A or B) standard.

3. Verify the colors of the RCA plugs and connect one (1) Stereo PC-Audio

Balun to the PC audio 3.5mm connector of the PC output.

4. Verify the colors of the RCA plugs and connect a compatible MuxLab Stereo

Audio Balun (i.e. 500027) to the left-audio and right-audio RCA connectors of
the TV or audio receiver at the remote end.

5. Complete the connection between the two (2) baluns, using standard UTP

cable, connector blocks and appropriate modular RJ45 outlets.

6. Power-on the audio equipment and check the audio quality. The audio should

be clear within the maximum specified distances. The following diagram
shows a typical configuration using the 500030 and the 500027.

Troubleshooting

The following table describes some of the symptoms, probable causes and possible solutions
in respect to the installation of the Stereo PC-Audio Balun. If you still cannot diagnose the
problem, please call MuxLab Customer Technical Support at 877-689-5228 (toll-free in North
America) or 514-905-0588 (International).

Symptom Probable Causes Possible Solutions

Poor audio
quality
Split pair Ensure that the UTP pairs are not

No audio No power Check your audio system for power.
Open circuit Check wiring to ensure continuity
Defective balun Change Stereo PC-Audio Baluns for

Audio phase
cancellation
Audio weak Distance specifications

EMI interference. Check that wiring is not too close to

transformers and ballasts.

split and that each pair of wires is
twisted.

another pair.

Reversed wires Check for straight-through wiring.

Check DC loop resistance and verify

exceeded

if distance spec is exceeded. Reduce
cable length or eliminate high-loss
components.

© MuxLab Inc.