MuxLab Stereo Hi-Fi/Video GLI Balun Installation guide

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MuxLab Stereo Hi-Fi/Video GLI Balun Installation guide | Manualzz




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 Transmission

Composite Video Audio

Bandwidth DC to 6 MHz


Max. Input

Insertion Loss

Return Loss

75 ohms

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

Common Mode Rejection

Ratio (CMRR)

Max. Distance via

Cat 5E/6 UTP/STP Cable

Greater than 40 dB over the frequency range

2,200 ft (670 m)

Pin Configuration (RJ45) Video: Pins 7(R) & 8(T)

Reverse Polarity Sensitive


Cat 5E/6 UTP/STP



20 Hz to 20 kHz over the distance range

600 ohms min.

1.1 Vp-p

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)

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





Order Information

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)


500039 Stereo Hi-Fi/Video Balun

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

Tel: (514) 905-0588 Fax: (514) 905-0589

Toll Free (North America): (877) 689-5228

E-mail: [email protected] URL:

© MuxLab Inc.

94-000393-B SE-000423-B

Stereo Hi-Fi / Video Balun


Quick Installation Guide


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.


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

No video

No continuity in video link

Power off

Improper connection and/or swapped pair

Unusual colors Reversed polarity

Background pattern EMI interference


Weak contrast

Image not stable

Horizontal bars moving slowly

Snowy picture

Exceeded distance

Exceeded distance

Unusual link attenuation

Defective link or equipment

Substantial crosstalk between multiple video sources

Distance is near limit

Possible Solutions

Verify cable continuity between pairs of baluns.

Check power supplies of video equipment.

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

EMI interference

Poor audio quality

No audio

Split pair

No power

Open circuit

Defective balun

Audio phase cancellation

Audio weak

Reversed wires

Distance specifications exceeded

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.

Check your audio system for power.

Check wiring to ensure continuity

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

Check for straight-through wiring.

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

If you still cannot diagnose the problem, please call MuxLab Customer Technical

Support at 877-689-5228 (toll-free in North America) or (+1) 514-905-0588


© MuxLab Inc.


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