Black Box AC300A, AC300A-TX, AC300A-RX, MD650A-85, MD650A-13 Specifications

1

All-digital processing
and transmission!

Support component,
composite, or S-Video
connections plus
stereo audio.

Work over a single
multimode or single­mode fiber.

Easy to set up—video
and audio cables are
included.

Extend video/audio
more than 35 miles
over single-mode fiber.

Ideal for advanced
A/V or security
applications.

LEDs show presence
of power, video, and
audio signals.

A

nalog systems aren’t always

ideal when trying to extend the
latest advanced video and audio
systems. For enhanced video
quality and the highest audio
fidelity, you need a digital system.

That‘s what you get with the
Universal Video/Stereo Audio Fiber
Extenders: crystal-clear digital
transmission. Unlike traditional
fiber optic extender systems that
use analog processing and
transmission technology—which
frequently results in a less-than­optimal image—the Universal
Extenders use all-digital
processing and transmission.

This digital encoding results in
superior, noise-free signal quality
with no crosstalk or drifting, and
there’s no adjustment over the
usable length of the fiber required.

The standalone Universal
Video/Stereo Audio Fiber Extender
is a ”universal” one because it
works with composite, S-Video, or
component video, and it ships with
cables for making those types of
connections. It supports all
component video formats,
including Y-P

B-PR

, Y-CB-CR, YUV,

Use one fiber to transmit one video

signal and two audio signals.

Key Features

UNIVERSAL VIDEO/STEREO AUDIO FIBER EXTENDERS

and Y/R-Y/B-Y, and is compatible
with NTSC, PAL, and SECAM video
formats.

For a proper mix of brightness
and clarity in colors, the extenders
feature 15-MHz bandwidth
luminance and 7.5-MHz
chrominance bandwidth.

The extenders also feature
independent audio channels,
which can be configured for either
balanced or unbalanced inputs and
outputs. By default, each extender
is set for balanced 600-ohm input
impedance and balanced audio
output. But it can be changed by
simply adjusting DIP switches on
its back panel.

LEDs indicate the presence
of power and video and audio
signals at all times on each
extender.

The Universal Video/Stereo
Fiber Extenders are ideal for
numerous applications, such
security systems, point-of-sale
displays, and professional video
A/V setups. Because the fiber
extenders support today’s more­sophisticated DVD players with
progressive scan as well as 480p

HDTV signals, they’re a great fit for
advanced A/V systems.

The advantages of fiber.

Fiber optics also offers uniform
performance and superior signal­to-noise ratio in the transmission
medium as well as a higher degree
of reliability and security. Fiber also
is a great medium for long-distance
applications. And, unlike coax and
twisted-pair media, there’s no
bulky cable connections to deal
with.

Fiber is also great for shorter
distances in which you need to
send many signals. With the
extenders, you can use a single
fiber to send such signals point to
point, eliminating the need for extra
coax or shielded twisted-pair
cabling.

The extenders work with both
multimode and single-mode fiber.
Data can be sent over 1310-nm
multimode at distances up to 2 km
(1.2 mi.). For greater distance, use
1310-nm single-mode fiber and get
distances up to 60 km (37.2 mi.)

.

You’ll need to order both a
transmitter (AC300A-TX) and a
receiver (AC300A-RX) for the
system to work.

Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 • www.blackbox.com • e-mail: [e-mail]

© 2003. All rights reserved.

Black Box Corporation.

08/4/2003 #10597

For specifications and ordering information, see page 3.

2

Compatible with
RS-232, RS-422, and
RS-485 (2- or 4-wire).

Data rates up to
10 Mbps for RS-422
and RS-485.

Use in both point-to­point and drop-and­repeat networks.

Available in 850- and
1310-nm operating
wavelength versions.

Internal circuitry
performs all specified
conversions.

Easy to configure
modes using DIP
switches.

LEDs continuously
monitor operation for
power and data.

ST connectors.

Use the RTS signal
or data to enable the
RS-485 transmitter.

C

onverting from one type of

protocol to another shouldn’t
complicate your job when trying
to extend data over fiber optic
transmission systems. Why
spend the time and money to
mount external RS-232, RS-422,
or RS-485 converters alongside
fiber transmitters and receivers
and complicate the installation
further?

To avoid the hassle, order a

pair of standalone BLACK BOX

®

Universal Fiber Optic Line Driver
Transceivers. These economical
and reliable devices perform the
necessary protocol conversions
so different types of equipment
can talk to another—and they
extend your data over fiber.

The transmitting transceiver
converts all signals passing
through it into pulses of light
on its optical connectors’ LED.
Because the devices’ internal
circuitry reduces RS-232, RS-422,
and RS-485 protocols to this
common denominator, converting
one protocol to another is simple.
You get the input and output
protocol that you need—
automatically. The receiving
transceiver outputs the light it
receives in the selected protocol
via a photodiode at its optical
connector.

Protocol conversion through

one device— plus the benefits

of fiber optics!

Key Features

UNIVERSAL FIBEROPTIC LINE DRIVER TRANSCEIVERS

You can use the transceivers
in both simplex and full-duplex
asynchronous applications
for both point-to-point and drop­and-repeat data networks. For
instance, you can set them up to
work in a ring (or loop-type) data
bus. In this mode, any location
linked via the transceivers can
receive or insert data into the
ring/loop, but only one station
at a time can insert data.

The Universal Fiber Optic
Line Driver Transceivers can
also perform RS-485 two-wire
conversions to and from RS-232
or RS-422. To do this, they use
the same two signal leads for
both transmitting and receiving
data, with each unit alternating
between a transmit and receive
state. You can instruct the
transceivers to switch this way
either by sensing an external RTS
(Request to Send) signal, or by
having it internally sense
the actual data that’s being
transmitted.

To set the transceivers either
for external or internal operation,
simply adjust their internal DIP
switches. You only have to pay
attention to the polarity of the
different protocols and be sure
that software you’re using on the
overall system allows for
turnaround times when switching
between protocols, as well as for

the number of times a master will
”poll” the local unit before an
error is detected.

Installation of the transceivers
is simple because there are no
operating controls on the units.
Other than setting the protocol,
speed, and mode of operation
with the internal DIP switches,
you need only to connect the
signal, power supply, and fiber
optic cables between the
transmitter and receiver
transceiver units. By default, the
Universal Fiber Optic Line Driver
Transceivers are set to operate
in RS-232 protocol, point-to-point,
and in low speed.

For diagnostic purposes,
each Universal Fiber Optic Line
Driver Transceiver has three
LED indicators that continuously
monitor operation and power. The
Tx (Transmit) and RX (Receive)
LEDs light when the transmitted
or received data is in ”high” or off
when it’s in the ”low” state and
blink at the corresponding data
rate.

For specifications and ordering information, see page 3.