Black Box AC043A-R2 User manual

CUSTOMER
SUPPORT
INFORMATION
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
DECEMBER 2000
AC043A-R2
AC043AE-R2
AC044A-R2
AC044AE-R2
S-Video Splitter-8
Composite Video Splitter-8
OUTPUT
78
AGC
ON
OFF
GAIN
GREEN=
UNITY GAIN
CAL
ON
OFF
COMPOSITE Splitter-8
OUTPUT
78
S-Video
Splitter-8
AGC
ON
OFF
GAIN
GREEN=
UNITY GAIN
CAL
ON
OFF

1
FCC/IC RFI STATEMENTS
FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA
RADIO-FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio-frequency energy, and if not
installed and used properly, that is, in strict accordance with the manufacturer’s
instructions, may cause interference to radio communication. It has been tested
and found to comply with the limits for a Class A computing device in accordance
with the specifications in Subpart J of Part 15 of FCC rules, which are designed to
provide reasonable protection against such interference when the equipment is
operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference, in which case the user at his own
expense will be required to take whatever measures may be necessary to correct
the interference.
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A 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 la classe A 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.
Any other trademarks mentioned in this manual are acknowledged to be the property of the
trademark owners.

2
S-VIDEO SPLITTER-8 AND COMPOSITE VIDEO SPLITTER-8
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
S-VIDEO SPLITTER-8 AND COMPOSITE VIDEO SPLITTER-8
1. Specifications
Compliance — FCC Part 15 Subpart J Class A, IC Class/classe A
Interfaces — AC043 models: S-Video (Y/C, NTSC/PAL/SECAM);
AC044 models: Composite video (NTSC/PAL/SECAM)
Bandwidth
(Resolution/
Refresh Rate) — Over 100 MHz (sufficient for standard TV signals or for
most scan-converted computer video)
Rise/Fall Times — 3.5 ns
Propagation
Delay — Less than 10 ns
Input
Characteristics — Impedance:
AC043 models: 75 ohms Y/C;
AC044 models: 75 ohms;
Coupling: AC;
Level: 0.5 to 1.5 Vpp (70 to 210 IRE);
Gain:
–6 to +6 dB or unity or automatic unity ref. from sync
tip to IRE white;
Manual gain has calibration detection;
LED is green when gain = unity (AGC off) or when
output level is 1 Vpp (AGC on);
Differential gain: 0.25%;
Differential phase: 0.25 degrees
Output
Characteristics — Impedance:
AC043 models: 75 ohms Y/C;
AC044 models: 75 ohms;
Coupling: DC;
Level (maximum): Greater than 1.5 Vpp into 75 ohms;
DC restoration: Switchable: Pedestal or sync TIP = 0 VDC

5
CHAPTER 1: Specifications
Maximum
Distance — Will depend on a number of factors, including cabling
(the lower its capacitance and resistance, the better);
resolution/refresh rate (if the video has been scan-
converted from a computer source); and, on the input
side, the ability of the source device to drive the signal;
The maximum distance we recommend running to a
video source (input) is 25 ft. (7.6 m), but it’s a good
idea to keep this distance as short as possible;
The maximum distance we recommend running to any
video destination (output) is 250 ft. (76.2 m)
User Controls — (1) Front-mounted knob for manual gain control;
(3) Toggle switches: (1) rear-mounted for DC restore/
clamp, (2) front-mounted for calibration and AGC
Indicator — (1) Front-mounted “GREEN = UNITY GAIN” LED
Connectors — AC043 models: (9) 4-pin mini-DIN female;
AC044 models: (9) BNC female
Temperature
Tolerance — Operating: 50 to 104˚F (10 to 40˚C);
Storage: 32 to 104˚F (0 to 40˚C)
Humidity
Tolerance — Up to 80% noncondensing
Enclosure — High-impact plastic
Power — Through wallmount power supply:
AC043A-R2, AC044A-R2:
Input: 120 VAC, 60 Hz;
Output: 12 VAC at up to 850 mA;
AC043AE-R2, AC044AE-R2:
Input: 220 VAC, 50 Hz;
Output: 12 VAC at up to 1.7 A
Size — 1.5"H x 7.1"W x 5.4"D (3.8 x 18 x 13.7 cm)
Weight — Net: 1 lb. (0.5 kg);
Shipping: 3 lb. (1.4 kg)

6
S-VIDEO SPLITTER-8 AND COMPOSITE VIDEO SPLITTER-8
2. Introduction
The S-Video Splitter-8 (AC043A-R2, AC043AE-R2) and Composite Video Splitter-8
(AC044A-R2, AC044AE-R2) distribute a video signal from one source to many
video displays. All models feature DC restoration and fixed, manual, and automatic
gain controls.
The S-Video Splitter-8 is a 100-MHz S-Video (Y/C) distribution amplifier for
S-Video (S-VHS), Hi-8, ED-BETA, and other video formats that use 4-pin mini-DIN
connectors.
The Composite Video Splitter-8 is a 100-MHz composite-video distribution
amplifier with BNC connectors.
Features include:
• 100-MHz bandwidth;
• 8 outputs from a single output;
• Fixed, manual, and automatic gain control;
• Unity gain; and
• Can be placed on a flat surface or mounted in a rack.
Here’s what should have been in your complete Splitter-8 package:
• The Video Splitter-8.
• A wallmount power supply rated for output of 12 VAC and up to either
850 mA (120-VAC input) or 1.7 A (220-VAC input).
• This manual.

7
CHAPTER 3: Installation
3. Installation
Most external connections to the Video Splitter-8 are made to its rear panel, which
is shown in Figure 3-1.
Figure 3-1. Rear panel of the AC043 (top) and AC044 (bottom) models of
the Video Splitter-8.
3.1 Preparation
If you’d like to place your Video Splitter-8 on a flat surface such as the top of a
table, desk, or counter, leave at least 3 inches (7.6 cm)of clearance behind the unit
for making cable connections.
If you’d like to rackmount your Splitter-8, we recommend using a rackmount
tray (product code RM001 or RM002). You can mount one unit by itself in a tray,
or mount two units side by side.
You will probably want to place the Video Splitter-8 as close as possible to your
video monitors and other output devices in order to minimize the length of cable
you need to run. It is important that the video cables meet your local safety and
building codes.
123456 INPUT
SYNC TP
DC RESTORE/
CLAMP
POWER
12VAC
OUTPUT
BLACK
1 2 3 4 5 6 INPUT
SYNC TP
DC RESTORE/
CLAMP
POWER
12VAC
OUTPUT
BLACK

8
S-VIDEO SPLITTER-8 AND COMPOSITE VIDEO SPLITTER-8
3.2 Connecting the Input Device (Video Source)
Using the appropriate cable, connect your video source to the connector labeled
“INPUT” on the rear panel of the Video Splitter-8.
For the S-Video (AC043) models, use an S-Video cable with 4-pin mini-DIN
connectors such as product code EHN058. When you install this cable, make sure
that the small pins in its mini-DIN connector are not bent or damaged before you
plug the connector into the jack on your Splitter-8. Align the cable connector with
the plastic key down.
For the Composite Video (AC044) models, use a standard coaxial composite-
video cable with BNC connectors such as product code ETN59. When you install
this cable, make sure to turn its BNC connector clockwise to its locking position.
3.3 Connecting Monitors and Other Output Devices (Video Destinations)
Make sure your video monitors, recorders, and other output devices meet your
local safety and building codes. Using the appropriate cable, connect these devices
to any of the Video Splitter-8’s connectors labeled “OUTPUT.” In many
applications, outputs 1 through 6 on the Splitter-8’s rear panel are used for
permanent connections while outputs 7 and 8 on the front panel—shown in
Figure 4-1 on page 10—are used for temporary connections. This isn’t required,
though; all of the outputs function exactly the same way.
In most situations, you’ll use the cable types, and follow the installation tips,
discussed in Section 3.2. However, for the Composite Video Splitter-8, note that
some monitors have only RCA®type input jacks. To attach ETN59 or some other
coax cable with BNC connectors to these monitors would require a BNC female to
RCA male adapter. We don’t carry these as stock items, but you can call for a
special quote. However, if you aren’t running farther than 50 ft. (15.2 m) to such a
monitor, you might be able to plug a BNC male to RCA female adapter such as
product code FA870 into the Splitter-8’s output port, then run RCA cable such as
product code EJ200 or EJ202 to the monitor. We don’t recommend this type of
cabling or guarantee that it will work.
3.4 Connecting Power
To connect your Video Splitter-8 to an AC power source, first uncoil the output
cord attached to the power supply’s transformer. Plug this cord into the “POWER
12VAC” jack on the Splitter-8’s rear panel. Next, plug the transformer into a
standard AC-power receptacle. You might need a power adapter to plug the 220-VAC
power supply of the AC043AE-R2 or AC044AE-R2 into one of your local outlets.

9
CHAPTER 4: Configuration and Operation
4. Configuration and Operation
The Video Splitter-8 usually operates unattended. It will continuously relay any
received input signal to all connected output devices (monitors, video recorders,
etc.). However, it does have two sets of controls that affect the way it operates:
calibration and AGC controls in front plus a DC restore/clamp switch in the rear.
4.1 The Gain Controls and LED
The AGC (automatic gain control) switch, CAL (calibration) switch, GAIN knob,
and “GREEN = UNITY GAIN” LED are on the Video Splitter-8’s front panel, as
shown in Figure 4-1 on the next page. Here’s how these components determine
and indicate the Splitter-8’s video handling, assuming an NTSC video input:
• With the CAL and AGC switches both ON, the LED is always lit and the knob
has no effect. The AC043 models maintain a constant S-Video output level of
Y = 1 Vpp, C = 288 mVpp. The AC044 models maintain a constant composite-
video output level of 1 Vpp.
• With the CAL switch ON and the AGC switch OFF, the LED is always lit and
the knob has no effect. Output levels follow input levels (Vout = Vin, unity
gain); in this setting, the Splitter-8 doesn’t amplify the input signal before
retransmitting it to the output equipment.
• With the CAL switch OFF and the AGC switch ON, the knob determines the
output level regardless of the input level. For the AC043 models, output can
range from Y = 0.5 Vpp, C = 144 mVpp (with the knob as far as it can go
counterclockwise) to Y = 1.5 Vpp, C = 432 mVpp (with the knob as far as it can
go clockwise). The LED lights when Vout = 1 Vpp, which should occur when
the knob is approximately at its central point.
• With the CAL and AGC switches both OFF, the output level will equal the
input level multiplied by the gain selected with the knob (Vout = gain x Vin).
Amplification can range from –6 dB (input signal halved, with the knob as far
as it can go counterclockwise) to +6 dB (input signal doubled, with the knob as
far as it can go clockwise). The LED lights when gain = 1 (unity gain), which
should occur when the knob is approximately at its central point.

10
S-VIDEO SPLITTER-8 AND COMPOSITE VIDEO SPLITTER-8
Figure 4-1. Front panel of the AC043 (top) and AC044 (bottom) models of
the Video Splitter-8.
4.2 The DC Restore/Clamp Switch
The DC restore/clamp switch is on the rear panel of your Video Splitter-8, as
shown in Figure 3-1 on page 7. Set it to the position which yields the best picture.
For most applications, you’ll get a better picture if you set the switch to the
“BLACK” (DOWN) position. In this position, the output video is clamped at 0 VDC
(see Figure 4-2). Some monitors, however, will display a better picture if you set
this switch to the “SYNC TIP” (UP) position, which causes the Splitter-8 to raise the
sync signal above ground/0 VDC (see Figure 4-3).
Figure 4-2. Video output clamped at 0 VDC.
Figure 4-3. Video output raised above ground.
0 VDC SYNC
VIDEO
0 VDC
SYNC
VIDEO
7
AGC
OUTPUT
ON
OFF
GAIN
GREEN =
UNITY GAIN
8
CAL
ON
OFF
COMPOSITE Splitter-8
7
AGC
OUTPUT
ON
OFF
GAIN
GREEN =
UNITY GAIN
8
CAL
ON
OFF
S-Video
Splitter-8

11
CHAPTER 5: Troubleshooting
5. Troubleshooting
If the monitors or other output devices don’t seem to be displaying or recording
the image from the video source, first check to make sure that the video source
device is ON and that it’s properly connected to the Video Splitter-8. Then make
sure that the output devices are properly connected to the Splitter-8.
If this doesn’t help, or if you have some other problem, contact Black Box as
described in the rest of this chapter.
5.1 Calling Black Box
If you determine that your Video Splitter-8 is malfunctioning, do not attempt to alter
or repair it. 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—that is, what type of input device,
what type of output device, type and make of your cables, etc.;
• 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.
5.2 Shipping and Packaging
If you need to transport or ship your Video Splitter-8:
• Package it carefully. We recommend that you use the original container.
• If you are shipping the unit for repair, please include its power supply. If you
are returning the unit, please include everything you received with it. Before
you ship it back to Black Box for repair or return, contact us to get a Return
Authorization (RA) number.

NOTES

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax [phone]
© Copyright 2000. Black Box Corporation. All rights reserved.