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ClearGain
®
Tower-Mounted Amplifier
3
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System Overview
The ClearGain TMA system is modular, consisting of a masthead unit (MHU), a power distribution
unit (PDU) and a Bias-T Unit, providing full compatibility with all base stations.
The ClearGain MHU offers dual duplex operation and incorporates a highly advanced fixed-gain,
low-noise amplifier (LNA) and high-performance filters for added reliability.
The ClearGain MHU features a slim, lightweight design. This allows two ClearGain MHUs to be
mounted with one set of brackets, conserving valuable and costly tower space and reducing clutter
on the tower. The MHU is protected with a strong, seamless aluminum cover designed to ensure
superior weather protection and resistance to corrosion, resulting in increased reliability.
In the ClearGain TMA system, DC power is supplied to the MHU from a ClearGain PDU. The PDU also
provides alarming and monitoring of feeder cable and up to six MHUs from a single unit. The flexible
design of the ClearGain PDU allows it to be rack- or wall-mounted on the side of a BTS cabinet.
An external Bias-T Unit is used in conjunction with the ClearGain PDU. The Bias-T extracts DC power
from the coaxial cable and inserts signals from the alarm and monitor circuits onto the coaxial cable.
ClearGain
®
Tower-Mounted Amplifier
Europe, Middle East, Africa