Clear-Com Communication Systems
Encore System Installation Instruction Manual
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INTRODUCTION
Congratulations on choosing Clear-Com products. Clear-Com was
established in 1968 and remains the market leader in providing
intercom for entertainment, educational, broadcast and industrial
applications. The ruggedness and high build-quality of Clear-Com
products is 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 how to install your intercom system. Please pay particular
attention to the section on system wiring, as improper wiring detracts
from the performance of the system or causes system failure. If you
encounter a situation or have a question that this manual does not
address, contact your dealer or call Clear-Com direct at the factory.
Our applications support and service people are standing by to assist
you. 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 both 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 is a distributed amplifier system; each Main or Remote
Station houses its own microphone preamplifier, headset or speaker
power amplifier, and signaling circuitry. Stations bridge the intercom
line at a very high impedance and place a minimum load on the line.
The audio level always remains constant, and does not fluctuate as
stations leave and join the system. Low-impedance mic input lines
and specially designed circuitry make Clear-Com channels virtually
immune to RFI and dimmer noise.
Clear-Com stations are interconnected with two-conductor, shielded
microphone cable (or individually shielded multi-pair cable as
required). Portable stations are connected with 2 conductor cables
with 3-pin XLR connectors. One wire, connected to pin 2, carries the
DC power from a Main Station or Power Supply to all Remote Stations.
The other wire, connected to pin 3, carries the 2-way (duplex) audio
information. The shield, connected to pin 1, acts as a common ground.
One termination per channel is needed throughout the intercom
network, and is usually located in the Main Station or Power Supply.
Clear-Com Main Stations, Power Supplies and certain Remote
Stations each have an auxiliary program input with its own volume
control, which allows an external audio source to be fed to the intercom
system.
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