Clear-Com TW-12C - Manual (Page 7)

S y s t e m I n s t a l l a t i o n M a n u a l
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OPERATION
INTRODUCTION
Congratulations on choosing this Clear-Com product. Clear-Com was
established in 1968 and remains the market leader in providing intercoms for
entertainment, educational, broadcast and industrial applications. The
ruggedness and high build-quality of Clear-Com products defines the industry
standard. In fact, many of our original beltpacks and main stations are still in
daily use around the world.
We recommend that you read through this manual completely to better
understand the functions of the SB-704. If you encounter a situation or have a
question that this manual does not address, contact your dealer or call
Clear-Com directly. Our applications support and service people are standing by
to assist you. (Refer to Chapter 5,“Warranty” for contact information.) Thank
you for selecting Clear-Com for your communications needs.
THE CLEAR-COM CONCEPT
Clear-Com is a closed-circuit intercom system that consistently provides
high-clarity communication in high-noise and low-noise environments. A basic
system consists of a single- or multi-channel power supply or main station
connected to various single- or multi-channel remote stations, such as beltpacks
and loudspeaker stations.
Clear-Com manufactures a wide variety of both portable and fixed-installation
units. All are compatible with each other. Clear-Com intercom systems can also
interface with other communication systems and devices.
SYSTEM OVERVIEW
The TW-12C is a transparent device that provides an electrically isolated
interface between two intercom systems (ClearCom and RTS, for exanple). The
interface consists of two identical 2-wire-to-4-wire hybrid networks, with
transformer isolation between them. This complete electrical isolation breaks
ground loops that occur when two systems are run from separate power sources.
The TW-12C hybrid provides a wide range of null adjustments, allowing it to
adapt to many different line conditions. It can handle various line lengths and
impedances.
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