CommScope MRx18 User manual

MRx18/x18 & MRx18/x18/x18 &
MRx18/y18/y18 & MRx18/y18
miniRepeater
Dual- / Triple-Segment
and
Dual-Band
User's Manual
M0139ACN

Page 2 M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-Band
DISCLAIMER:
This document has been developed by CommScope, and is intended for the use of its
customers and customer support personnel. The information in this document is subject to
change without notice. While every effort has been made to eliminate errors, CommScope
disclaims liability for any difficulties arising from the interpretation of the information
contained herein. The information contained herein does not claim to cover all details or
variations in equipment, nor to provide for every possible incident to be met in connection
with installation, operation, or maintenance. This document describes the performance of the
product under the defined operational conditions and does not cover the performance under
adverse or disturbed conditions. Should further information be desired, or should particular
problems arise which are not covered sufficiently for the purchaser’s purposes, contact
CommScope.
CommScope reserves the right to change all hardware and software characteristics without
notice.
COPYRIGHT:
© Copyright 2021 CommScope Inc. All Rights Reserved.
This document is protected by copyright. No part of this document may be reproduced,
stored in a retrieval system, or transmitted, in any form or by any means, electronic,
mechanical photocopying, recording, or otherwise without the prior written permission of
CommScope.
TRADEMARKS
All trademarks identified by ® or ™ are registered trademarks or trademarks, respectively, of
CommScope. Names of products mentioned herein are used for identification purposes only
and may be trademarks and / or registered trademarks of their respective companies.
Andrew Wireless Systems GmbH, 17-February-2021

Table of Contents
M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-Band Page 3
TABLE OF CONTENTS
1. GENERAL 6
1.1. ABBREVIATIONS 6
1.2. HEALTH AND SAFETY 6
1.3. PROPERTY DAMAGE WARNINGS 7
1.4. COMPLIANCE 8
1.5. ABOUT COMMSCOPE 12
1.6. CONTACTING COMMSCOPE 13
1.6.1. CommScope Mobility Solutions (CMS) Technical Support 13
1.6.2. Accessing DCCS User Documentation 13
1.6.3. Technical Training 13
2. INTRODUCTION 14
2.1. PURPOSE 14
2.2. THE MRX18 MINIREPEATER 14
3. FUNCTIONAL DESCRIPTION 16
3.1. GENERAL 16
3.2. DESIGN AND CONNECTORS 18
4. INSTALLATION AND COMMISSIONING 19
4.1. MECHANICAL INSTALLATION 19
4.1.1. Health and Safety for Mechanical Installation 19
4.1.2. Property Damage Warnings for Mechanical Installation 19
4.2. ELECTRICAL INSTALLATION 20
5. SOFTWARE SETUP 24
5.1. LOGIN 24
5.2. MENU BAR – BUTTONS 24
5.3. STATUS BAR 25
5.4. STATUS 25
5.5. SETTINGS 27
5.5.1. Settings - Radio Frequency 27
5.5.2. Settings - Alarms 31
5.5.3. Settings - Modem Control 31
5.5.4. Settings - LAN Connectivity 33
5.5.5. Settings - User Account 35

Table of Contents
Page 4 M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-
Band
5.6. MAINTENANCE 36
5.7. LOGOUT 37
5.8. UPLOAD NEW SOFTWARE VERSION 38
6. OPTIONAL EQUIPMENT 40
6.1. EXTERNAL MODEM (KIT) 40
6.2. ANTENNA 40
6.3. ADAPTER CABLE 40
7. ALARMING AND SUPERVISION 41
7.1. ALARM LEDS 41
7.2. DISPLAY AND RESET & INSTALLATION ASSISTANCE BUTTON 42
8. APPENDIX 44
8.1. ELECTRICAL SPECIFICATIONS MRX18 44
8.1.1. MRx18/x18 Dual-Segment/MRx18/x18/x18 Triple-Segment 44
8.1.2. MRx18/y18/y18 and MRx18/y18 Dual-Band 45
8.2. ENVIRONMENTAL AND SAFETY SPECIFICATIONS MRX18 46
8.3. MECHANICAL SPECIFICATIONS MRX18 46
8.4. SPARE PARTS LIST 47
9. LIST OF CHANGES 48
10. INDEX 49

Figures and Tables
M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-Band Page 5
FIGURES AND TABLES
figure 3-1 Block diagram MRx18/x18 dual-segment (e.g. MR918/918) .................... 16
figure 3-2 Block diagram MRx18/x18/x18 triple-segment (e.g. MR918/918/918)...... 16
figure 3-3 Block diagram MRx18/y18 dual-band (e.g. MR2118/918)........................ 17
figure 3-4 Block diagram MRx18/y18/y18 dual-band (e.g. MR2118/918/918) .......... 17
figure 3-5 Connectors of MRx18............................................................................... 18
figure 4-1 Wall-mounting bracket.............................................................................. 19
figure 4-2 Wall mounting procedure.......................................................................... 20
figure 4-3 Power connection of DC connector with MRx18....................................... 21
figure 5-1 Login......................................................................................................... 24
figure 5-2 Menu-bar buttons ..................................................................................... 24
figure 5-3 Status-bar buttons.................................................................................... 25
figure 5-4 Status - General & Alarms........................................................................ 25
figure 5-5 Settings - Radio Frequency...................................................................... 27
figure 5-6 Settings - Alarms...................................................................................... 31
figure 5-7 Settings - Modem Control......................................................................... 31
figure 5-8 Settings - LAN connectivity....................................................................... 33
figure 5-9 Settings - User Account............................................................................ 35
figure 5-10 Maintenance........................................................................................... 36
figure 5-11 Logout .................................................................................................... 37
figure 5-12 Upload new software version ................................................................. 38
figure 6-1 Coverage antenna for MRx18, optional equipment .................................. 40
figure 7-1 Display and alarm LEDs........................................................................... 41
figure 7-2 Display with reset button and alarm LEDs................................................ 42
figure 7-3 Display - RSSI.......................................................................................... 43
figure 7-4 Display - Gain UL and DL......................................................................... 43
figure 7-5 Display - Pout UL and DL........................................................................... 43
figure 8-1 Cabinet drawing MRx18/x18/x18.............................................................. 46
table 5-1 Menu-bar buttons, description ................................................................... 24
table 5-2 Status bar, description............................................................................... 25
table 5-3 Refresh and Auto Refresh buttons, description ......................................... 25
table 5-4 Status – General........................................................................................ 26
table 5-5 Status - Alarms.......................................................................................... 26
table 5-6 Radio Frequency – Power ......................................................................... 28
table 5-7 Radio Frequency – General....................................................................... 29
table 5-8 Radio Frequency - Auto Gain .................................................................... 30
table 5-9 Settings - Alarms ....................................................................................... 31
table 5-10 Settings - Modem Control........................................................................ 32
table 5-11 LAN Connectivity - General ..................................................................... 34
table 5-12 LAN Connectivity - DHCP Settings.......................................................... 34
table 5-13 LAN Connectivity - SNMP Settings.......................................................... 35
table 5-14 Settings - User Account........................................................................... 35
table 5-15 Maintenance - Modem Debugging........................................................... 36
table 5-16 Maintenance - Software Update .............................................................. 37
table 5-17 Maintenance - Webpage Update............................................................. 37
table 7-1 Alarm LEDs ............................................................................................... 41

1. General
Page 6 M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-
Band
1.General
1.1.Abbreviations
3GPP 3rd Generation Partnership
Project Channel
ALC Automatic Level Control
BCCH Broadcast Control
BITE Built-In Test Equipment
BTS Base Transceiver Station
CDMA Code Division Multiple Access
CF Center Frequency
CFO Center Frequency Offset
CFR Code of Federal Regulations
DL Downlink
DoC Declaration of Conformity
EDGE Enhanced Data Rates for GSM
Evolution
ESD Electrostatic Discharge
ETS European Telecommunication
Standard
ETSI European Telecommunication
Standards Institute
GSM Global System for Mobile
Communication
GUI Graphical User Interface
I2C-Bus Inter-Integrated Circuit Bus
(Philips)
ID No Identification Number
IF Intermediate Frequency
ISDE Innovation, Sciences et
Développement économique
Canada
ISED Innovation, Science and
Economic Development
Canada; formerly IC / Industry
Canada
LED Light Emitting Diode
LMT Local Maintenance Terminal
LNA Low Noise Amplifier
MCC Mobile Country Code
MNC Mobile Network Code
MR Microwave Repeater
MS Mobile Station
OIP-3 Output Intercept Point of the
3rdOorder
OMC Operation and Maintenance
Center
PA Power Amplifier
PCS Personal Communication System
PSTN Public Switched Telephone
Network
PSU Power Supply Unit
RED Radio Equipment Directive
Rev Revision
RF Radio Frequency
RoHS Directive on Restriction of certain
Hazardous Substances
RLP Radio Link Protocol
RSSI Receive Signal Strength
Indication
RTC Real-Time Clock
RX Receiver
SCL Serial Clock
SDA Serial Data
SMSC Short Message Service Center
TCH Traffic Channel
TDMA Time Division Multiple Access
TX Transmitter
UE User Equipment
UL Uplink
UMTS Universal Mobile Telecommuni-
cation System
UPS Uninterruptable Power Supply
URL Uniform Resource Locutor
VSWR Voltage Standing Wave Ratio
1.2.Health and Safety
Caution: High frequency radiation in operation. Risk of health hazards associated
with radiation from the antenna(s) connected to the unit. Implement prevention
measures to avoid the possibility of very close proximity to the antenna(s) while in
operation.

1. General
M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-Band Page 7
1.3.Property Damage Warnings
1. Attention: Due to power dissipation, the unit may reach a very high temperature.
Do not operate this equipment on or close to flammable materials. Use caution
when servicing the unit.
2. Attention: If the plug of the unit’s power supply cable serves as disconnecting
device, the socket for devices with a plug connection must be easily accessible
and within easy reach.
3. Notice: Although the repeater is internally protected against overvoltage, it is
strongly recommended to ground (earth) the antenna cables close to the
repeater’s antenna connectors for protection against atmospheric discharge.
4. Notice: ESD precautions must be observed. Before commencing maintenance
work, use the available grounding (earthing) system to connect ESD protection
measures.
5. Notice:Only suitably qualified personnel are allowed to work on this unit and only
after becoming familiar with all safety notices, installation, operation and
maintenance procedures contained in this manual.
6. Notice: Keep operating instructions within easy reach and make them available
to all users.
7. Notice:Read and obey all the warning labels attached to the unit. Make sure that
all warning labels are kept in a legible condition. Replace any missing or damaged
labels.
8. Notice:Only license holders for the respective frequency range are allowed to
operate this unit.
9. Notice: Make sure the repeater settings are correct for the intended use (refer to
the manufacturer product information) and regulatory requirements are met. Do
not carry out any modifications or fit any spare parts, which are not sold or
recommended by the manufacturer.
Unless otherwise agreed to in writing by CommScope, CommScope’s general limited
product warranty (http://www.commscope.com/Resources/Warranties/) shall be the
warranty governing the MRx18 Units, including the installation, maintenance, usage
and operation of the MRx18 Units.

1. General
Page 8 M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-
Band
1.4.Compliance
1. Notice: For installations, which have to comply with FCC RF exposure
requirements, the antenna selection and installation must be completed in a way
to ensure compliance with those FCC requirements. Depending on the RF
frequency, rated output power, antenna gain, and the loss between the repeater
and antenna, the minimum distance D to be maintained between the antenna
location and human beings is calculated according to this formula:
]/
[
][
][
2
4
cm
mW
mW
cm
PD
P
D∗
∗
=
π
where
•P (mW) is the radiated power at the antenna, i.e. the max. rated repeater
output power in addition to the antenna gain minus the loss between the
repeater and the antenna.
•PD (mW/cm²) is the allowed Power Density limit acc. to 47 CFR 1.1310 (B)
for general population / uncontrolled exposures which is
oF (MHz) / 1500 for frequencies from 300MHz to 1500MHz
o1 for frequencies from 1500MHz to 100,000MHz
RF exposure compliance may need to be addressed at the time of licensing, as
required by the responsible FCC Bureau(s), including antenna co-location
requirements of 1.1307(b)(3).
2. Notice:For installations which have to comply with European EN50385 exposure
compliance requirements, the following Power Density limits/guidelines (mW/cm²)
according to ICNIRP are valid:
o0.2 for frequencies from 10 MHz to 400 MHz
oF (MHz) / 2000 for frequencies from 400 MHz to 2 GHz
o1 for frequencies from 2 GHz to 300 GHz
3. Notice: Installation of this equipment is in full responsibility of the installer, who
has also the responsibility, that cables and couplers are calculated into the
maximum gain of the antennas, so that this value, which is filed in the FCC Grant
and can be requested from the FCC data base, is not exceeded. The industrial
boosters are shipped only as a naked booster without any installation devices or
antennas as it needs for professional installation.

1. General
M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-Band Page 9
4. Notice: For installations which have to comply with FCC/ISED requirements:
English:
This device complies with FCC Part 15 and Industry Canada license exempt RSS
standard(s). Operation is subject to the following two conditions: (1) this device may not
cause interference, and (2) this device must accept any interference, including
interference that may cause undesired operation of the device.
This device complies with Health Canada’s Safety Code. The installer of this device
should ensure that RF radiation is not emitted in excess of the Health Canada’s
requirement. Information can be obtained at http://www.hc-sc.gc.ca/ewh-
semt/pubs/radiation/radio_guide-lignes_direct-eng.php.
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
Antenna Stmt for ISED:
This device has been designated to operate with the antennas having a maximum gain
of 9 dBi. Antennas having a gain greater than 9 dBi are prohibited for use with this
device without consent by ISED regulators. The required antenna impedance is 50
ohms.
The antenna(s) used for this transmitter must be installed to provide a separation
distance of at least 100 cm from all persons and must not be co-located or operating in
conjunction with any other antenna or transmitter. Users and installers must be provided
with antenna installation instructions and transmitter operating conditions for satisfying
RF exposure compliance.
French:
Cet appareil est conforme avec Santé Canada Code de sécurité 6. Le programme
d’installation de cet appareil doit s’assurer que les rayonnements RF n’est pas émis au-
delà de I’exigence de Santé Canada. Les informations peuvent être obtenues:
http://www.hc-sc.gc.ca/ewh-semt/pubs/radiation/radio_guide-lignes_direct-fra.php
Antenne Stmt pour ISDE:
Ce dispositif a été désigné pour fonctionner avec les antennes ayant un gain maximal de
9 dBi. Antennes ayant un gain plus grand que 9 dBi sont interdites pour une utilisation
avec cet appareil sans le consentement des organismes de réglementation d’ISDE.
L’impédance d’antenne requise est 50 ohms.
L’antenne (s) utilisé pour cet émetteur doit être installé pour fournir une distance de
séparation d’au moins 100 cm de toutes les personnes et ne doit pas être co-localisées
ou opérant en conjonction avec une autre antenne ou émetteur. Les utilisateurs et les
installateurs doivent être fournis avec des instructions d’installation de l’antenne et des
conditions de fonctionnement de l’émetteur pour satisfaire la conformité aux expositions
RF.

1. General
Page 10 M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-
Band
5. Notice: The power supply of the unit complies with Overvoltage Category II. It
also complies with the surge requirement according to EN 61000-4-5 (fine
protection); however, installation of an additional medium (via local supply
connection) and/or coarse protection (external surge protection) is recommended
depending on the individual application in order to avoid damage caused by
overcurrent.
For Canada and US, components used to reduce the Overvoltage Category shall
comply with the requirements of IEC 61643-series. As an alternative, components
used to reduce the Overvoltage Category may comply with ANSI/IEEE C62.11,
CSA Certification Notice No. 516, CSA C22.2 No. 1, or UL 1449. Suitability of the
component for the application shall be determined for the intended installation.
6. Notice: Corresponding local particularities and regulations must be observed. For
national deviations, please refer to the respective documents that can be
downloaded as well.
7. Note: For a Class A digital device or peripheral:
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own expense.
8. Note: For a Class B digital device or peripheral:
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference.
9. Note: This unit complies with European standard EN60950-1 / EN62368-1.

1. General
M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-Band Page 11
Equipment Symbols Used / Compliance
Please observe the meanings of the following symbols used in our equipment and
the compliance warnings:
Symbol
Compliance
Meaning / Warning
--- FCC
For industrial (Part 20) signal booster:
WARNING: This is NOT a CONSUMER device. It is
designed for installation by FCC LICENSEES and
QUALIFIED INSTALLERS. You MUST have an FCC
LICENSE or express consent of an FCC Licensee to
operate this device. Unauthorized use may result in
significant forfeit
ure penalties, including penalties in
excess of $100,000 for each continuing violation.
--- ISED
WARNING: This is NOT a CONSUMER device. It is
designed for installation by an installer approved by an
ISED licensee. You MUST have an ISED LICENCE or
the express consent of an ISED licensee to operate this
device.
AVERTISSEMENT: Ce produit N’EST PAS un appareil
de CONSOMMATION. Il est conçu pour être installé par
un installateur approuvé par un titulaire de licence
d’ISDE. Pour utiliser cet appareil, vous DEVEZ détenir
une LICENCE d’ISDE ou avoir obtenu le consentement
exprès d’un titulaire de licence autorisé par ISDE.
CE
To be sold exclusively to mobile operators or authorized
installers – no harmonized
frequency bands, operation
requires license. Intended use: EU and EFTA countries
Indicates conformity with the RED directive 2014/53/EU
and/or RoHS directive 2011/65/EU.
CE
Indicates conformity with the RED directive 2014/53/EU
and RoHS directive 2011/65/EU certified by the notified
body no. 0700.
WEEE Recycling
Do not put the units into the garbage but dispose of them properly
according to local and/or regional regulations.
Country specific information about collection and recycling arrangements per the
Waste Electrical and Electronic Equipment (WEEE) Directive and implementing
regulations is available on CommScope’s website.
http://www.commscope.com/About-Us/Corporate-Responsibility-and-Sustainability/Environment/#recycling

1. General
Page 12 M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-
Band
1.5.About CommScope
CommScope is the foremost supplier of one-stop, end-to-end radio frequency (RF)
solutions. Part of the CommScope portfolio are complete solutions for wireless
infrastructure from top-of-the-tower base station antennas to cable systems and
cabinets, RF site solutions, signal distribution, and network optimization. For patents
see www.cs-pat.com.
CommScope has global engineering and manufacturing facilities. In addition, it
maintains field engineering offices throughout the world.
Andrew Wireless Systems GmbH based in Buchdorf/Germany, which is part of
CommScope, is a leading manufacturer of coverage equipment for mobile radio
networks, specializing in high performance, RF and optical repeaters. Our optical
distributed networks and RF repeater systems provide coverage and capacity
solution for wireless networks in both indoor installations and outdoor environments,
e.g. tunnels, subways, in-trains, airport buildings, stadiums, skyscrapers, shopping
malls, hotels and conference rooms.
Andrew Wireless Systems GmbH operates a quality management system in
compliance with the requirements of ISO 9001 and TL 9000. All equipment is
manufactured using highly reliable material. To maintain highest quality of the
products, comprehensive quality monitoring is conducted at all fabrication stages.
Finished products leave the factory only after a thorough final acceptance test,
accompanied by a test certificate guaranteeing optimal operation.
Hereby Andrew Wireless Systems declares that the radio equipment type Repeater
is in compliance with Directive 2014/53/EU.
The full text of the EU declaration is available at the following internet address:
http://www.commscope.com/resources/in-building-wireless.
According to the DoC, our “CE”-marked equipment can be used in all member
states of the European Union.
Note:Exceptions of and national deviations from this intended use may be possible.
To observe corresponding local particularities and regulations, please refer to
the respective documents (also in national language) which can be
downloaded under the same link as this manual.
To make the most of this product, we recommend you carefully read the instructions
in this manual and commission the system only according to these instructions.
In case you need additional manuals as reference, they can be downloaded under
the same link as this manual or as specified in the “Accessing DCCS User
Documentation“ part of the next chapter. Application notes and other additional
documents that may be required as reference can either be downloaded under the
same link or are available upon request.
For technical assistance and support, please also contact the local office or
CommScope directly at one of the addresses listed in the following chapter.

1. General
M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-Band Page 13
1.6.Contacting CommScope
1.6.1. CommScope Mobility Solutions (CMS) Technical Support
For additional information, please contact CMS Technical Support:
Telephone Helplines:Call one of the Telephone Helpline numbers listed below to
get live support, 24 hours a day.
Global 24X7
[phone]
(Toll free for U.S. and Canada)
EMEA 8:00-17:00 (UTC +1)
+ 800 73732837
(Toll free for parts of EMEA and Australia)
+ 49 909969333
(Toll charge incurred)
Calls to an EMEA Helpline outside of the 8:00 to 17:00 time frame will be forwarded
to the 24x7 Helpline.
Online Support: Click on the following URL link to submit tickets using the online
CMS Technical Support Form:
http://www.commscope.com/wisupport
Alternatively, enter the preceding URL into your web browser, and then
press ENTER on your keyboard or scan the QR code.
1.6.2. Accessing DCCS User Documentation
To access the Customer Portal of DCCS (Distributed Coverage and
Capacity Solutions), scan the QR Code to the right or go to
http://www.commscope.com/membership. Follow the prompts and click
DCCS to open the site. A user account and password are required.
Please register for an account if you don’t have one. Once you have
access, click to select a product line link to access the documentation for that
product.
1.6.3. Technical Training
To access the CommScope University Training site, please use the
following web address http://www.commscopeuniversity.com or scan
the QR code to the right.
Both online and classroom training are available. Instructor-led courses
are conducted in North America and Europe. Before choosing a
course, please verify the region.
For training related questions, please contact us:
Americas: [e-mail]
EMEA: [e-mail]

2. Introduction
Page 14 M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-
Band
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 (DL) 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 (UL) path the repeater 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 referred to as MRx18 in the
following sections.
CommScope’s 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 a 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
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.
The MRx18 has an optional remote-monitoring function that provides equipment
alarming and basic configuration settings via a GSM-SMS. Alarm SMSs (including
heartbeat) can be forwarded to the common Andrew OMC or to any standard SMS
receiver (even a mobile phone). Moreover, the MRx18 can be connected to LAN.

2. Introduction
M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-Band Page 15
Features at a glance
•Up to three variable segments within one frequency band, or up to three
variable segments allocated in two frequency bands
•Easy to install due to light weight, small dimensions and Auto Gain
functionality
•Integrated combiner / crossband coupler, no external devices required,
common antenna ports for all bands/segments equipped
•Easy commissioning via web-based GUI
•Automatic Level Control (ALC)
•Variable bandwidth
•Automatic power down/up option at user-defined DL RSSI threshold
•LEDs for local alarm indication
•RSSI and status indication via display
•Optional remote control via SMS
•Connection to LAN
•Remote alarming through SNMP alarm traps
•Compliant with all regulatory agencies (e.g. GSM 05.05, 3GPP and FCC)

3. Functional Description
Page 16 M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-
Band
3. Functional Description
3.1.General
The name of a specific MRx18 miniRepeater reflects the frequency range in which it
operates (e.g. MR918 => 900 MHz frequency range). The operation principle of the
dual- and triple-segment is depicted in the following two block diagrams:
figure 3-1 Block diagram MRx18/x18 dual-segment (e.g. MR918/918)
figure 3-2 Block diagram MRx18/x18/x18 triple-segment (e.g. MR918/918/918)
E0783B8
E0783BA

3. Functional Description
M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-Band Page 17
The MRx18 dual-band operates in two different frequency bands:
The first illustration shows the MRx18/y18 dual-band – one segment per each
frequency band:
figure 3-3 Block diagram MRx18/y18 dual-band (e.g. MR2118/918)
The second illustration shows the MRx18/y18/y18 dual-band – one segment in
frequency band 1 and two segments in frequency band 2:
figure 3-4 Block diagram MRx18/y18/y18 dual-band (e.g. MR2118/918/918)
E0783BB
E0783BC

3. Functional Description
Page 18 M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-
Band
3.2.Design and Connectors
figure 3-5 Connectors of MRx18
Note: SMA connectors have a specified torque of 0.45 N-m. Use an appropriate
tool to fasten and unfasten these connectors. Do not over-tighten the
connectors or screws.
RF donor antenna
connector, BTS, SMA
DC PSU connector
Modem connector
DC + Data
Reset and
installation
assistance
switch
RF coverage antenna
connector, mobile, SMA
Ethernet
connector
RF modem connector SMA,
25 dB coupling loss

4. Installation and Commissioning
M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-Band Page 19
4. Installation and Commissioning
4.1.Mechanical Installation
4.1.1. Health and Safety for Mechanical Installation
Caution: Risk of serious personal injury by equipment falling due to improper
installation. The installer must verify that the supporting surface will safely
support the combined load of the electronic equipment and all attached
hardware and components. The screws and dowels (wall anchors) used should
also be appropriate for the structure of the supporting wall.
4.1.2. Property Damage Warnings for Mechanical Installation
1. Attention: Do not install the unit in a way or at a place where the specifications
outlined in the Environmental and Safety Specifications leaflet of the supplier are
not met.
2. Attention: It is the responsibility of the installer to verify that the supporting
surface will safely support the combined load of the electronic equipment and all
attached hardware and components and to ensure that the unit is safely and
securely mounted.
3. Notice: Use proper mounting hardware depending on the structure of e.g. the
wall where the unit will be installed.
To mount the MRx18 to a wall, proceed as follows:
1. Use two appropriate screws
and dowels to fasten the wall-
mounting bracket through the
two slot holes to a wall. (The
screw type depends on the
quality of your wall).
figure 4-1 Wall-mounting bracket
MRx18
miniRepater
Wall-mounting bracket
2 thread nuts
2 slot holes

4. Installation and Commissioning
Page 20 M0139ACN Manual for MRx18 Dual/Triple-Segment & Dual-
Band
2. Insert the MRx18 into the wall-mounting bracket.
3. Fasten the repeater by means of 2 metric M5x50 fillister-head screws to the two
thread nuts of the wall mounting bracket.
figure 4-2 Wall mounting procedure
4.2.Electrical Installation
1. Notice: The electrical installation has to be performed in accordance with the
safety regulations of the local authorities. Due to safety reasons, the electrical
installation must be performed by qualified personnel only. The repeater must not
be opened.
2. Notice: Cable shields (outer conductors) of coaxial cables that lead into or out of
the building must be included in the equipotential bonding system of the building,
either on the devices or separately. If a galvanic isolator, a fully insulated
subscriber junction box or house transfer points with galvanic isolation are used
for the inner conductor and for the cable shield (outer conductor), there is no
need for equipotential bonding for the subscriber terminal.
3. Notice: When exchanging or removing active or passive devices (e.g. amplifiers,
splitters, or coaxial cables), care must be taken to avoid that leakage currents
from terminal equipment cause dangerous voltages to arise between the
interrupted parts (inner conductors and/or cable shields (outer conductors)) by
disconnecting the loop. It must be ensured that the conductive connection of the
cable shields (outer conductors) is maintained even when devices are
exchanged or removed in order to avoid electric shock (dangerous body
currents). The inner conductors must also be secured against contact. Before a
temporary solution for the equipotential bonding is applied, the parts to be
detached (e.g. the F-type plug-in connector of a removed cable) should remain
connected to the temporary connection for equipotential bonding during the
entire uninstallation/installation process.
4. Notice: Observe the labels on the front panels before connecting or
disconnecting any cables.
front side
rear side
2 M5x50 screws