Muxlab Stereo Audio-Video Balun User Manual

Specifications

Environment

Devices

Transmission

Bandwidth
Peripherals’ impedance
Maximum Voltage Input
THD
Insertion Loss

Return Loss
Common Mode Rejection
Ratio (CMRR)
Max. Distance
Cable:
Cat5e/6 UTP/STP

Cable: RCA
Cable: BNC
Connectors

Pin Configuration

Temperature

Enclosure
Dimensions
Weight
Warranty
Order Information

Composite video and unbalanced audio for the consumer and
commercial market.
DVD, VCR, camcorders, audio receivers, audio amplifiers, AV
switchers, splitters, AV mixers and other analogue audio-video
equipment featuring coaxial input or output with BNC or RCA
connectors.
Transparent to the user

Video Audio

DC to 8 MHz 20 Hz to 20 kHz
75 ohms Source 100 Ω Max, Receiver 10 kΩ min.

1.1 Vp-p 1.1 Vp-p
NA Less then 0.007% @ 1 kHz
Less than 2 dB per
pair
Better than 15 dB NA
Greater than 40 dB NA

Cat5e/6: 2,200 ft Cat5e/6: 3250 ft
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
Standard audio cable terminated by RCA connectors
75-ohm coaxial cable
One (1) BNC-receptacle (includes 9” coax jumper cable)
Two (2) RCA-receptacles
One (1) RJ45 jack
Video: Pins 7(R) & 8(T)
Audio 1: Pins 1(R) & 2(T)
Audio 2: Pins 3(R) & 6(T)
Operating: 0° to 55°C
Storage: -20° to 85°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)

4.25 oz (121 g)
Lifetime
500001 Stereo Audio-Video Balun

Less than 2 dB per pair

Stereo Audio-Video Balun

500001

Quick Installation Guide

Overview

The Stereo Audio-Video Balun allows the transmission of composite baseband video
signals and audio signals via unshielded twisted pair (UTP) cables in a Structured
Cabling System. The Stereo Audio/Video Balun is used in pairs to transmit standard
NTSC, SECAM and PAL composite video. It converts a composite baseband video
(75 ohms) and stereo-audio signal from coax to UTP.

The Stereo Audio-Video Balun is connected to the structured cabling via a modular wall
jack in the work area. It is equipped with a BNC 75-ohm connector and two standard
RCA phono jacks at one end and a RJ45 jack at the other end. The 500001 has a
20 Hz- 20 kHz bandwidth for high fidelity applications.

Applications

The Stereo Audio-Video Balun is designed for use with CCTV cameras, monitors,
DVR, DVD players, cableboxes, AVR, video-conferencing, camcorders and other
composite video/audio equipment. Applications include: security/surveillance
monitoring, video bulletin boards, financial information services, news services,
education, video training, airport displays, video capture, stock exchange, hotels and
convention centers.

8495 Dalton Road, Montreal, Quebec, Canada. H4T 1V5

Tel: [phone] Fax: [phone]

Toll Free (North America): [phone]

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

© MuxLab Inc. 2010 94-000231-G SE-000115-G

Installation

Troubleshooting

To install a Stereo Audio-Video Balun, perform the following steps:

Caution: Do not attempt to open the housing. There are no user-serviceable parts

inside the Video Stereo Audio Balun. Opening the unit will void your
warranty.

1. Turn off power and disconnect the video equipment by following the
manufacturer’s instructions.

2. Make certain that telecommunications outlets and cross connects to which you will
connect the Stereo Audio-Video Balun are configured properly and labeled
appropriately to identify the circuit.

Caution: Do not connect the Stereo Audio-Video Balun to a telecommunication

outlet wired to unrelated equipment. Making such a connection may
damage the equipment and/or the balun. Please ensure that all wiring is
“straight-through.”

3. Verify that the desired twisted pairs are not being used for other LAN or telephony
equipment.

Caution: Do not mount the balun over equipment ventilation openings. Covering

the openings may cause the equipment to overheat.

4. The Stereo Audio-Video Baluns operate in pairs.

5. Depending on the equipment being connected, connect the BNC connector of the
Stereo Audio-Video Balun to the coax connector or cable of the video equipment.
The two audio channels provided may be used if required. Either one or both
channels may be used depending on the application. (BNC and phono plug cables
must be obtained separately.)

6. Connect one end of a UTP line cord to the RJ45 modular jack of the Stereo Audio­Video Balun.

7. Plug the other end of the line cord into the appropriate video wall outlet or patch
panel.

8. Power up the video and/or audio equipment. The following diagram shows a
typical configuration.

The following tables describe some of the Stereo Audio-Video Balun symptoms,
probable causes and possible solutions regarding the 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

Smearing Exceeded distance

Weak contrast

Image not stable Defective link or equipment Verify video equipment interface integrity.

Horizontal bars
moving slowly

Snowy picture Distance is near limit

Audio Symptom Probable Cause Possible Solutions

Poor Quality Audio

No Audio

Weak Audio

EMI interference

Exceeded distance

Unusual link attenuation

Substantial crosstalk
between multiple video
sources

EMI interference
Split pair
Power-off
Open contact
Defective Audio Balun

Distance exceeds specs

Lower grade UTP cable is
introducing high signal
losses.

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.

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.

Check that wiring is not too close to
Correct the UTP pairs if they are split.
Check power supply.
Check wiring to ensure continuity.
Change Audio Baluns for another pair.
Check DC loop resistance.

Reduce cable length or eliminate high-loss
components.

Use signal repeater for extended distance.
Replace cable by higher grade.

© MuxLab Inc. 2010