Black Box IC441A-R2 User manual

CUSTOMER
SUPPORT
INFORMATION
Order toll-free in the U.S.: Call 877-877-BBOX (o tside U.S. call 724-746-5500)
FREE technical s pport 24 ho rs a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mailing address: Bla k Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.bla kbox. om • E-mail: info@bla kbox. om
JUNE 2002
IC441A-R2
Video Stereo Audio Baluns
VIDEO
PAIR 4
(7 & 8)
AUDIO(L)
PAIR 2
(3 & 6)
AUDIO(R)
PAIR 3
(1 & 2)
Video S ereo
Audio Balun

1
FCC/IC RFI STATEMENTS, TRADEMARKS
FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA
RADIO-FREQUENCY INTERFERENCE STATEMENTS
Class B Digital Device. This equipment has been tested and found to comply with the
limits for a Class B computing device pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or telephone reception,
which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
• Consult an experienced radio/TV technician for help.
Caution: Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
To meet FCC requirements, shielded cables are required to connect this device to
other Class B certified devices.
This digital apparatus does not exceed the Class B limits for radio noise emission from digital
apparatus set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de classe B prescrites dans le Règlement sur le brouillage
radioélectrique publié par Industrie Canada.
TRADEMARKS USED IN THIS MANUAL
BLACK BOX and the logo are registered trademarks of Black Box
Corporation.
VELCRO®is a registered trademark of Velcro USA Inc.
Any other trademarks mentioned in this manual are acknowledged to be the property of the
trademark owners.

2
VIDEO STEREO AUDIO BALUNS
NORMAS OFICIALES MEXICANAS (NOM)
ELECTRICAL SAFETY STATEMENT
INSTRUCCIONES DE SEGURIDAD
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de
que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para
referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de
operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca
de la tina de baño, lavabo, sótano mojado o cerca de una alberca, etc..
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que
sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea
recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá
a lo descrito en las instrucciones de operación. Todo otro servicio deberá ser
referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no
interfiera su uso. La colocación del aparato eléctrico sobre una cama, sofá,
alfombra o superficie similar puede bloquea la ventilación, no se debe colocar
en libreros o gabinetes que impidan el flujo de aire por los orificios de
ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor
como radiadores, registros de calor, estufas u otros aparatos (incluyendo
amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del
tipo descrito en el instructivo de operación, o como se indique en el aparato.

3
NOM STATEMENT
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización
del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no
sean pisados ni pellizcados por objetos colocados sobre o contra ellos,
poniendo particular atención a los contactos y receptáculos donde salen del
aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas
de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea
usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean
derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su
desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.

4
VIDEO STEREO AUDIO BALUNS
Contents
Chapter Page
1. Specifications ............................................................................................. 5
2. Introduction ............................................................................................... 7
3. Installation .................................................................................................. 8
4. Troubleshooting ...................................................................................... 10
4.1 Things to Try If Problems Occur ..................................................... 10
4.2 Calling Black Box .............................................................................. 11
4.3 Shipping and Packaging ................................................................... 11

5
CHAPTER 1: Specifications
1. Specifications
Cable Required: Between Balun pairs: Unshielded twisted pair (UTP):
Construction Standard: Category 3 or higher;
Gauge: 24 AWG or lower;
Termination: RJ-45 plugs;
Pairs: 3 or more (6 wires used) to carry all video and audio
channels;
Impedance: 100 ohms at 1 MHz;
Maximum Capacitance: 20 pF/ft. (6.1 pF/m);
Maximum Attenuation: 6.6 dB/1000 ft. (2 dB/km);
To attached devices:
Video: (1) Standard 75-ohm RG59/U coaxial cable with a
BNC male connector on the Balun end, preferably the
cable supplied with the Balun;
Audio: (2) Standard RCA phono cables
Compliance: FCC Class B, IC Class/classe B;
CISPR Pub. 22 Class B
Standard: Composite (baseband) video: NTSC, PAL, or SECAM
Impedance: Coaxial side: 75 ohms;
Phono side: 600 ohms;
UTP side: 100 ohms
Bandwidth: Video: DC to 8 MHz;
Audio: 20 Hz to 50 kHz
Maximum RF
Input: 1.1 volts at 60 Hz
Insertion Loss: Less than 2 dB over the DC-to-8-MHz frequency range
Return Loss: Greater than 15 dB over the DC-to-8-MHz frequency range
Common-Mode
Rejection: Greater than 40 dB at 8 MHz

6
VIDEO STEREO AUDIO BALUNS
Maximum
Distance: With Category 3 cable: 1200 ft. (365.8 m) for color video,
1500 ft. (457.2 m) for black & white video;
With Category 5 cable: 2200 ft. (670.6 m) for color video,
2500 ft. (762 m) for black & white video
Connectors: (1) RJ-45 female, (1) BNC female, and (2) RCA female
RJ-45 Pins Used: Pins 1 (audio right), 2 (audio right ground), 3 (audio left),
6 (audio left ground), 7 (video), 8 (video ground)
Temperature
Tolerance: Operating: 32 to 131˚F (0 to 55˚C);
Storage: -4 to +185˚F (-20 to +85˚C)
Humidity
Tolerance: Up to 95% noncondensing
Enclosure: Fire-retardant plastic with included optional VELCRO®
mounting material
Size: 2.3"H x 2.4"W x 1"D (5.8 x 6.1 x 2.5 cm)
Weight: With included cable: 4 oz. (113 g);
Without included cable: 2.8 oz. (79 g)

7
CHAPTER 2: Introduction
2. Introduction
With the Video Stereo Audio Balun, you can transmit composite baseband video
and audio signals across Category 3 or better unshielded twisted-pair (UTP) cable,
which is already wired into most commercial sites. Use pairs of Baluns to transmit
standard NTSC, PAL, or SECAM composite video with stereo audio: The Balun
near the media source takes a single composite baseband video signal from 75-ohm
coaxial cable, as well as left and right audio signals from two 600-ohm phono
cables, converts the signals, and transmits them over UTP cable to the other Balun,
which converts them back and sends them to their destination.
Connect the Video Stereo Audio Balun to a site’s structured cabling through
a modular wall jack in the work area. Each Balun has a BNC connector and two
RCA connectors at one end and an RJ-45 jack at the other end.
The Video Stereo Audio Balun is designed for use with CCTV cameras and
monitors, video-cassette recorders (NTSC, PAL, or SECAM), videoconferencing,
and other baseband audiovisual equipment. Applications include: security/
surveillance monitoring, video bulletin boards, financial information services,
news services, education, video training, airport displays, video capture, and
informational displays in stock exchanges, hotels, and convention centers.

8
VIDEO STEREO AUDIO BALUNS
3. Installation
To install a pair of Video Stereo Audio Baluns, take these steps:
CAUTION!
Do no a emp o open he housing. There are no user-serviceable par s
inside he Video S ereo Audio Balun. Opening he uni will void your
warran y.
1. Make sure that the video-destination device is not too far away from the
media-source device(s) (refer to the Maximum Distance specification in
Chapter 1). If the destination device is beyond the reach of the source Balun,
the signals the device receives will be weak or nonexistent.
2. Follow the manufacturer’s instructions for turning off power to the video and
audio equipment you will be attaching, and disconnecting that equipment
from AC power and from all other devices.
3. Make certain that the telecommunications outlets and cross-connects to
which you will connect the Baluns are configured properly and are labeled
so that the circuit can be identified.
CAUTION!
Do not connec he Video S ereo Audio Balun o a elecommunica ion
ou le wired o unrela ed equipmen . Making such a connec ion may
damage he equipmen and/or he Balun. Make sure ha all wiring is
s raigh - hrough-pinned.
4. Verify that the twisted-pair circuit you want to use is not already being used
for other LAN or telephone equipment.
5. Optional: Each Balun comes with VELCRO®mounting pads. To mount a
Balun to a surface, first make sure that that surface is free of dust, oil, etc.,
so the VELCRO will adhere to it. Then peel off the adhesive backing, attach
one side of the pads to the Balun, and attach the other side to the surface.
CAUTION!
Do not moun he Balun over equipmen -ven ila ion openings. Doing so
migh damage he Balun or cause he equipmen o overhea .
6. For each Balun—depending on what type of video equipment you are
attaching it to—plug its BNC female connector either directly into the
device’s BNC male connector, or into the BNC male connector of a cable that
runs to the device, such as the cable included with the Balun. You can also
run phono cables from your audio source(s) and plug them into the Balun’s

9
CHAPTER 3: Installation
RCA phono jacks; you can use one or both of the audio channels,
as appropriate for your application. Refer to Figure 3-1.
Figure 3-1. The Balun and its connectors.
7. Connect one end of a UTP cable into each Balun’s RJ-45 modular jack.
To carry the video signal, these cables must carry a wire pair pinned to
RJ-45 Pins 7 and 8. To carry the left audio signal, the cables must carry
a pair pinned to Pins 3 and 6. To carry the right audio signal, the cables
must carry a pair pinned to Pins 1 and 2.
8. Plug the other end of each UTP cable into the appropriate video wall outlet
or patch panel. When this is done, a complete cabling circuit should run
between the two baluns, as shown in Figure 3-2.
Figure 3-2. Two Baluns cabled together.
9. Reconnect and power up the video and audio equipment.
Your Video Stereo Audio Balun system should be ready for continuous operation.
VIDEO
PAIR 4
(7 & 8)
AUDIO(R)
PAIR 3
(1 & 2)
AUDIO(L)
PAIR 2
(3 & 6)
Video S ereo
Audio Balun
VIDEO
PAIR 4
(7 & 8)
AUDIO(R)
PAIR 3
(1 & 2)
AUDIO(L)
PAIR 2
(3 & 6)
Video S ereo
Audio Balun
VIDEO
PAIR 4
(7 & 8)
AUDIO(R)
PAIR 3
(1 & 2)
AUDIO(L)
PAIR 2
(3 & 6)
Video S ereo
Audio Balun
RJ-45 for UTP
Ca egory 3 or
higher UTP

10
VIDEO STEREO AUDIO BALUNS
4. Troubleshooting
4.1 Things to Try If Problems Occur
If at any time your Video Stereo Audio Balun system does not seem to be working
properly, take these steps:
1. Following the manufacturer’s instructions, perform diagnostics on your video
and/or audio equipment.
2. If this doesn’t solve the problem, check all cable connections and the integrity
of your site wiring.
3. You might be trying to transmit the audio/video signals across too great a
length of cable. The maximum distance over which the Baluns can transmit
and receive video signals depends on your cable and your video and audio
equipment; refer to the Maximum Distance specification in Chapter 1.
4. Make sure that the patch cord you are running between the Balun and your
site’s wiring system is the correct cable type and is properly pinned (see the
Cable Required specification in Chapter 1).
5. If possible, replace the Video Stereo Audio Baluns involved in the problem
with Video Stereo Audio Baluns that are known to be working, one at a time.
If at any point the problem goes away, there is probably a defect in the Balun
you just replaced.
6. If you still cannot diagnose the problem, call Black Box for technical support
as described in the next section.

11
CHAPTER 4: Troubleshooting
4.2 Calling Black Box
If you determine that a Video Stereo Audio Balun is malfunctioning, do not attempt
to alter or repair the unit. It contains no user-serviceable parts. Contact Black Box
Technical Support at 724-746-5500.
Before you do, make a record of the history of the problem. We will be able to
provide more efficient and accurate assistance if you have a complete description,
including:
• the nature and duration of the problem;
• when the problem occurs;
• the components involved in the problem;
• any particular application that, when used, appears to create the problem or
make it worse; and
• the results of any testing you’ve already done.
4.3 Shipping and Packaging
If you need to transport or ship your Video Stereo Audio Balun:
• Package it carefully. We recommend that you use the original container.
• If you ever ship the Balun back to us for any reason, contact Black Box to get a
Return Authorization (RA) number.

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax [phone]
© Copyright 2002. Black Box Corporation. All rights reserved.
Doc. No. 94000128A