Andrew Wireless Innovations Group MRB-LMR User Manual
MR Booster Manual (MN001808-1, 9/99)
Page 3
Section 2. System Description
2.1
Introduction
This section describes the basic functions and features of an MR Booster, including:
•
System overview
•
Theory of operation
•
System components
2.2
System Overview
The MR Booster is a broadband, bi-directional amplifier (BDA) used to extend the
coverage area in a wireless communications network. The booster is specifically
designed to interface with the MIKOM MR series repeater. It can also be used with
an existing repeater or a base transceiver station (BTS) that needs a downlink power
boost.
coverage area in a wireless communications network. The booster is specifically
designed to interface with the MIKOM MR series repeater. It can also be used with
an existing repeater or a base transceiver station (BTS) that needs a downlink power
boost.
Figure 2-1 illustrates a typical MR Booster application with a repeater, and Figure 2-
2 illustrates a typical application with a BTS. The booster is connected directly to the
coverage antenna port from the repeater or BTS and boosts the downlink signal
power while maintaining dynamic range on the uplink. The booster performs several
basic functions to enhance network coverage:
2 illustrates a typical application with a BTS. The booster is connected directly to the
coverage antenna port from the repeater or BTS and boosts the downlink signal
power while maintaining dynamic range on the uplink. The booster performs several
basic functions to enhance network coverage:
•
The repeater or BTS downlink RF output is filtered, amplified and transmitted,
via the mobile coverage antenna, using high efficiency RF power amplifiers.
•
Uplink RF signals from handsets in the coverage area are received at the mobile
antenna, amplified by an LNA, and passed directly to the repeater or BTS.
•
Control and alarm monitoring is maintained by MR repeater software or through
two relay contact outputs from the booster.
•
Power supply and power amplifier soft-fail redundancies offer increased
reliability.
•
A separate uplink diversity path is available as an option.
•
Downlink output VSWR monitoring is available as an option.