Muxlab Analog Audio Balun User Manual

Specifications

Environment Unbalanced analog mono or stereo audio.
Devices DVD, VCR, Camcorders, audio mixers, audio matrix switchers,

audio splitters, audio distribution amplifiers, boosters, Hi-Fi,
microphones, home theatre, and other commercial or
consumer analog audio equipment.

Transmission Transparent to the user.
Bandwidth (3dB roll-off)

(400 O source & 50 kO
receiver)
Maximum Input Level 1.1Vp-p (+20 dBu, unbalanced < 1% THD)

Insertion Loss per Balun
Pair
Common Mode Rejection
(CMMR)
Audio Source Impedance 100 to 600 O

Audio Receiver Impedance 10 kO to 100 kO
Impedance Transformation

Ratio
Cable – UTP

Connectors One (1) RCA-Male connector

Temperature Operating: 0° to 55° C. Storage:-20° to 85° C. Humidity: up

Enclosure Fire retardant plastic
Dimensions 1.25 x 0.5 x 0.5” (3.1 x 1.2 x 1.2 cm)
Weight 1.5 oz (42.5 gms)
Regulatory FCC, CE. Design patent pending.
Warranty Lifetime
Order Information 500019 Analog Audio Balun

8114 Trans Canada Hwy, St. Laurent, Quebec, Canada, H4S 1M5

Tel.: [phone] Fax: [phone]
Toll Free (North America): [phone]

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

94-000336-B SE-000314-B

Up to 1,000 ft (305m): 60Hz - 20 kHz
1,000 ft (305m) to 5,000 ft (1.5 km): 100Hz - 20 kHz

Less than 1 dB per pair over the frequency range

Greater than 60 dB @ 1 kHz

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

Two (2) screw terminals *
* Phase error sensitive. Ensure straight-thru polarity in stereo
audio applications.

to 95%

Analog Audio Balun (500019)

Installation Guide

Introduction

The VideoEase Analog Audio Balun allows any unbalanced analogue audio signal to
be transmitted via a single unshielded twisted pair (UTP) cable for more versatile
cabling. Used in pairs, the Audio Balun eliminates costly and bulky coax cable,
allowing consumer and commercial audio equipment to be connected using standard
premises wiring techniques. One or two pair of baluns is required depending on
whether the application is for monaural or stereo audio. The Audio Balun features
screw terminals and built-in cable strain relief for ease of installation and reliable
connectivity.

Installation

To install the Audio Baluns, perform the following steps:

1. Depending on the number of audio signals to be transmitted, use one pair of

Audio Baluns for each audio signal. For example; mono audio – two (2) baluns,
stereo audio - four (4) baluns, etc.

2. The Audio Balun is compact enough to allow multiple baluns to be mounted

adjacent to one another on the back of any audio equipment, thus eliminating
the need for RCA jumper cables and allowing maximum utilization of each
Category 5 cable.

Audio Left Audio Right

Audio Baluns installed on equipment

Rear View

3. Identify the pin configuration of the baluns. One twisted pair is required for

each audio balun connection. The Audio Balun is polarity sensitive. Therefore
stereo audio applications, for full stereo audio quality, please ensure straight­thru polarity as shown in the next diagram.

RCA male

Audio Balun (500018)
Top View (cover off)

Ring

Tip

Twisted pair cable

1 pair

Tip

Ring

4. The Audio Baluns work in pairs. Plug one Audio Balun into the RCA

connector of the audio source equipment. If stereo audio is being transmitted
connect one Audio Balun to Audio-Left and one Audio Balun to Audio-Right as
shown in the photo below.

5. Plug a second Audio Balun into the RCA connector of the audio receiver

equipment at the remote end. If stereo audio is being transmitted connect one
Audio Balun to Audio-Left and one Audio Balun to Audio-Right as shown in
the photo below.

6. Complete the connection between the two baluns, using standard UTP cable,

connector blocks and modular wall outlets.

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

be clear within the maximum specified distances.

DVD or VCR

Cat 5 twisted pair cable

Audio Amplifier

Troubleshooting

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

Symptom Probable Causes Possible Solutions

Poor audio quality 1. EMI interference. Check that wiring is not too close to

transformers and ballasts.

2. Split pair Check if the UTP pairs are split and

correct. Each signal pair must be twisted.

No audio 1. Power-off. Check power supply.

2. Open contact Check wiring to ensure continuity

3. Defective Audio Balun Change Audio Baluns for another pair.
Audio weak 1. Exceeded distance

specifications

2. Lower grade UTP cable is

introducing high signal
losses.

Replace cable by higher grade.

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

Use signal repeater for extended distance.

Analog Audio Source

Analog Audio Baluns (500019)

One pair required for mono

Two pairs required for stereo

Analog Audio Amplifier and

Speaker System