Black Box IC565A Manuel utilisateur

Specifications

Environment Unbalanced line-level analog audio.

Devices DVD players, audio receivers, audio amplifiers and audio

mixers, audio matrix switchers and other unbalanced line-level

audio equipment.

Transmission Transparent to the user.

Bandwidth (3dB

roll-off point)

(400 O source & 50

kO receiver)

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

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

Maximum Input

Level 1.1Vp-p (+20 dBu, unbalanced < 1% THD)

Insertion Loss per

Balun Pair Less than 1 dB per pair over the frequency range

Common Mode

Rejection (CMMR) Greater than 60 dB @ 1 kHz

Audio Source

Impedance 100 to 600 O

Audio Receiver

Impedance 10 kO to 100 kO

Impedance

Transformation

Ratio

Single unit: 4:1 (source:line)

Cable –UTP

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

Cable -Coax 75-ohm coaxial cable

Connectors Four (4) RCA-receptacle for audio. One (1) RJ45 jack

Pin Configuration Audio 1: Pins 7 (R) & 8 (T) Audio 2. Pins 3 (R) & 6

(T)

Audio 3: Pins 4 (R) & 5 (T) Audio 4: Pins 1 (R) & 2

(T)

Impedance Video: 75 ohms (RCA) unbalanced.

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

95%

Enclosure Fire retardant plastic

Dimensions 2.40” x 2.25” x 1.00” (6.1 x 5.7 x 2.54 cm)

Warranty Lifetime

Order Information IC565A Quad Audio Balun

94-000386-ASE-000417-A

Quad Audio Balun (IC565A)

Installation Guide

Introduction

The Quad Audio Balun allows up to four (4) analog line audio signals to be transmitted

via unshielded twisted pair (UTP) cable in a point-to-point connection. Used in pairs,

the Quad Audio Balun eliminates up to four (4) coaxial cables, allowing audio-video

equipment to be connected via space-efficient and cost-effective Category 5 twisted pair

cable. The Quad Audio Balun also works in conjunction with other Black Boxanalog

audio baluns such as the IC460A.

Installation

One (1) pair of baluns support four (4) mono unbalanced analog audio channels or two (2)

stereo audio channels via Cat5 twisted pair. To install the baluns, perform the following

steps:

1. Identify the pin configuration of the baluns. Four (4) twisted pairs are required

if all four (4) signals are transmitted. The pin configuration follows the

EIA/TIA 568A/B standard. The Quad Audio Balun is reverse polarity

sensitive. Please ensure that wiring is straight-through (Ring to Ring, Tip to

Tip).

2. At the audio source end, connect a Quad Audio Balun to the audio output using

the appropriate number of RCA cables.

3. At the audio receiver end, connect a Quad Audio Balun to the audio input using

the appropriate number of RCA cables.

4. Complete the connection between the two baluns, using standard Cat5 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 equipment. Check the sound quality and refer to the

troubleshooting table below if the sound quality is unsatisfactory. The

following diagram shows a typical installation.

Troubleshooting

The following tables describe some of the symptoms, probable causes and possible

solutions in respect to the installation of the Quad Audio Balun. If you still cannot

diagnose the problem, please call Black Box Tech Support at 724-746-5500.

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 Check DC loop resistance and verify

if distance spec is exceeded. Reduce

cable length or eliminate high-loss

components.

2.Lower grade UTP cable

is introducing high

signal losses.

Use signal repeater for extended

distance.

Replace cable by higher grade.

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