Studio Technologies 44 User Manual
User Guide
Issue 2, September 2006
This User Guide is applicable for serial numbers:
M44-00151 and later
Copyright © 2006 by Studio Technologies, Inc., all rights reserved
www.studio-tech.com
50030-0906, Issue 2
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Introduction
The Model 44 is designed to work with
200-series announcer’s console products
from Studio Technologies. The unit serves
as an interconnection “hub,” providing
power and signal routing for up to six
announcer’s consoles. The Model 44 is
appropriate for in-studio as well as field
broadcast applications. Of special note is
its applicability for use in the live television
sports industry. The compact, one-rackspace enclosure is constructed using
heavy-gauge steel components.
For installation simplicity the Model 44 connects to the announcer’s consoles using
Ethernet-type twisted-pair cable assemblies.
Each of the Model 44’s six channels connects to its associated announcer’s console
using an RJ45 jack. Of the four pairs in the
jack, two are intended for transmission of
digital audio signals. A third pair can be used
to carry digital or analog audio signals, as
well as being used for special installationspecific applications. The fourth pair is used
to carry 24 volt DC, 150 milliamperes nominal maximum, to the announcer’s console.
The power provided by each of the Model
44’s six channels is individually over-current
and short-circuit protected. This minimizes
the chance that an error on one channel will
impact the others.
A second set of six RJ45 jacks provides
access to two pairs from the announcer’s
consoles’ RJ45 jacks. These jacks are
normally used to connect the digital audio
input and output signals to the main broadcast system equipment, such as a digital
matrix intercom system, an audio console,
or a routing switcher. The Model 44 also
provides a 25-pin D-subminiature connector that is used to provide access to a third
cable pair from the announcer’s consoles’
RJ45 jacks.
The unit’s mains power input can be in the
range of 100 to 230 volts, 50/60 hertz. This
“universal input” ensures correct operation
virtually anywhere in the world. Two 24 volt
nominal, 30 watt internal power supplies
provide redundancy for critical broadcast
applications. For special applications an
external source of 24 volts DC can also be
connected. This allows, for example, battery
operation of the Model 44 and associated
announcer’s consoles. Three LED indicators, located on the unit’s front panel, provide status indication of the two internal and
one external power sources.
For special applications the Model 44
provides a nominal 24 volt, 70 milliamperes
nominal maximum power source. This
source could be useful when connecting
devices such as “tally” status indicators.
Model 44 Front Panel
Model 44 Back Panel
Model 44 User Guide Issue 2, September 2006
Studio Technologies, Inc. Page 3
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