2 Introduction
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2. INTRODUCTION
2.1. PURPOSE
The MRx18 miniRepeater a bi-directional amplifier used to enhance signals between a
mobile and a base station in a mobile network. It has been designed to increase signal
strength in small and medium sized areas such as offices, shops, and basements. By
boosting the signal level the MRx18 increases indoor coverage and allows high data
rate connectivity.
If weak signal transmissions occur within the coverage area due to indoor applications,
topological conditions or distance from the transmitter, a repeater is used to extend
transmission range. In the downlink path, the repeater picks up the signals from a donor
antenna of a BTS/ Node B, amplifies and re-transmits it into the required dark spot. In
the uplink path the signal picks up the signals from a mobile/ User Equipment (UE) and
re-transmits it to the BTS/ Node B.
2.2. THE MRx18 miniRepeater
Note: The MRx18/x18(/x18) and MRx18/
y18(/y18) is shortl y denominated as
MRx18 in the following.
Andrew MRx18 miniRepeater gives designers a simple tool to solve their small area
coverage and performance issues.
The MRx18 is easy to install. Also a web-based GUI simplifies commissioning and
configuring the equipment. The RF link (donor) towards the base station is typically fed
from an outdoor antenna while the coverage area is fed by an indoor antenna. The
opportunity to adjust the passband of repeater helps to cover any specific segment or
frequency band.
Due to modular design, the single-varia version MRx18 may be available as a dual-/
triple-varia segment or a dual-band-varia version in one cabinet. The dual-/ triple-
segment MRx18/x18(/x18) is able to transmit two or three variable segments within one
frequency band. The dual-band MRx18/y18(/y18) supports two frequency bands, while
one variable segment is amplified in one frequency band and up to two variable
segments are dedicated for the other frequency band.
Auto Gain functionality enables automatic gain adjustment in order to maximize the
performance, however gain may be set manually if desired.
An alarm interface with a display and LEDs indicates the status of the equipment locally.
Moreover, the status and alarms of the MRx18 can be queried via the web-based GUI.
