Andrew Wireless Innovations Group MN001808-1 user manual
MR Booster Manual
Order No. MN001808-1
Issue 7/99
©
Copyright 1999 Mikom
All Rights Reserved
Field Support
If you need technical assistance with the MR Booster contact MIKOM at:
Technical Hotline: (800) 800-3224
All rights reserved. No part of this publication, or any software included with it, may be
reproduced, stored in a retrieval system, or transmitted in any form or by any means,
including photocopying, electronic, mechanical, recording, or otherwise, without prior
written permission of the copyright holder.
This document contains proprietary information of MIKOM. The contents are confidential
and any disclosure to persons other than the officers, employees, agents, or subcontractors of
the owner or licensee of this document, without prior written consent of MIKOM, is strictly
prohibited.
Page - ii - MR Booster Manual (MN001808-1, 7/99)
Safety Information
The MR Booster equipment has been designed for maximum safety when installed, operated,
and maintained according to the instructions in this manual. Do not bypass any of the safety
features of this equipment or operate this equipment in an improper environment.
All wiring external to the equipment should comply with the current edition of the Electrical
Code or any national wiring rules that apply.
Publication Notice
The information in this document is subject to change without notice. MIKOM shall not be
liable for technical or editorial errors or omissions that may occur in this document, or for
incidental or consequential damages resulting from the furnishing, performance, or use of this
document.
MR Booster Manual (MN001808-1, 7/99) Page - iii -
LIMITED WARRANTY
to the first consumer (the "Warranty Period").
to have been defective in the respects aforesaid during the Warranty Period.
term with respect to any part or parts repaired or replaced by ALLEN TELECOM
WARRANTY PERIOD SPECIFIED ABOVE.
WARRANTY OR OF ANY IMPLIED WARRANTY.
for it any obligation or liability other than as herein expressly stated.
MIKOM, a division of ALLEN TELECOM INC. ("ALLEN
TELECOM"), warrants, on the terms and conditions hereto set forth, all products
manufactured by it to be free under normal use and service from defects in
materials and workmanship for a period of one (1) year from the date of shipment,
ALLEN TELECOM's obligation under this Warranty is limited to prompt
repair or replacement of the product, at its option, without charge, at an authorized
ALLEN TELECOM dealer or at the factory of ALLEN TELECOM in Cleveland,
Ohio, when the product is returned to an authorized dealer or to the factory with
all transportation charges prepaid and examination of the product shall disclose it
The Limited Warranty Period shall not be extended beyond its original
hereunder.
The Warranty Period shall not apply to any product which has been
repaired or altered in any manner by anyone other than ALLEN TELECOM or an
authorized outlet of ALLEN TELECOM, or if the defect , malfunction or failure
of the was caused by damage by lightning, flood or other acts of nature or by
power surges, or from unreasonable use, or from improper installation or
application, or to any product which has not been maintained or used in
accordance with the operating specifications set forth in ALLEN TELECOM's
written instructions.
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE ARE LIMITED IN DURATION TO THE
UNDER NO CIRCUMSTANCES SHALL ALLEN TELECOM BE
LIABLE FOR ANY CONSEQUENTIAL DAMAGES FOR BREACH OF THIS
ALLEN TELECOM neither assumes nor authorizes any person to assume
Page - iv - MR Booster Manual (MN001808-1, 7/99)
Contents
Page
Section 1. Introduction................................ ................................ ........................ 1
1.1 About This Manual................................ ................................ ................................ ........1
1.2 Conventions Used in This Manual................................ ................................ ................ 2
1.3 Terminology................................ ................................ ................................ .................. 2
Section 2. System Description................................ ................................ ............. 3
2.1 Introduction................................ ................................ ................................ ................... 3
2.2 System Overview................................ ................................ ................................ .......... 3
2.3 Theory of Operation ................................ ................................ ................................ ......5
2.3.1 Downlink Path ................................ ................................ ................................ ..5
2.3.2 Uplink Path ................................ ................................ ................................ .......6
2.3.3 System Control ................................ ................................ ................................ .6
2.4 System Components................................ ................................ ................................ ......9
2.4.1 Power Supply................................ ................................ ................................ ....9
2.4.2 Downlink Power Amplifier................................ ................................ .............. 9
2.4.3 Logic Controller Board................................ ................................ ..................... 9
2.4.4 PA Combiner/Splitter Module................................ ................................ ........ 10
2.4.5 Uplink Low Noise Amplifier................................ ................................ .......... 10
2.4.6 Duplexers................................ ................................ ................................ ........ 11
2.4.7 RF Cable ................................ ................................ ................................ .........11
2.4.8 Fan Assembly................................ ................................ ................................ ..11
2.4.9 VSWR Module................................ ................................ ............................... 11
2.4.10 Downlink Driver Amplifier................................ ................................ ............ 12
2.4.11 Input/Output Panel................................ ................................ .......................... 12
Section 3. Installation................................ ................................ ........................ 15
3.1 Introduction................................ ................................ ................................ ................. 15
3.2 Site Selection................................ ................................ ................................ ............... 15
3.2.1 Equipment Inventory ................................ ................................ ...................... 15
3.2.2 Installation Tools and Equipment ................................ ................................ ...16
3.2.3 Site Requirements................................ ................................ ........................... 16
3.3 Installation ................................ ................................ ................................ ................... 17
3.3.1 Mechanical................................ ................................ ................................ ......17
3.3.2 Electrical Connections ................................ ................................ .................... 20
3.3.3 RF Connections................................ ................................ ............................... 21
3.3.4 Logic Controller Board................................ ................................ ................... 22
3.4 Installation Checklist ................................ ................................ ................................ ...24
3.5 System Optimization................................ ................................ ................................ ...25
3.5.1 Downlink Gain Setting ................................ ................................ ................... 25
3.5.2 Downlink Power Measurement................................ ................................ ......25
3.5.3 Uplink Gain Setting................................ ................................ ........................ 26
MR Booster Manual (MN001808-1, 7/99) Page - v -
Contents
Section 4. Setting Up for Initial Operation ................................ ...................... 27
4.1 Introduction................................ ................................ ................................ ................. 27
4.2 Connecting a Terminal................................ ................................ ................................ 28
4.3 Basic Commands................................ ................................ ................................ ........ 29
4.3.1 Syntax................................ ................................ ................................ ............. 29
4.3.2 Entering Commands................................ ................................ ....................... 30
4.3.3 Commonly Used Commands................................ ................................ ......... 30
4.3.4 Escaping From Continuous Cycle................................ ................................ .. 31
4.3.5 Ending a Session ................................ ................................ ............................ 31
4.4 Using SET Menus................................ ................................ ................................ ....... 32
4.4.1 Moving Forward................................ ................................ ............................. 32
4.4.2 Moving Backward................................ ................................ .......................... 33
4.4.3 Exiting................................ ................................ ................................ ............ 33
4.5 Setting Initial Parameters................................ ................................ ............................ 33
4.5.1 Checking System Status................................ ................................ ................. 33
4.5.2 Setting PA Parameters................................ ................................ .................... 33
Section 5. Troubleshooting................................ ................................ ............... 35
5.1 Introduction................................ ................................ ................................ ................. 35
5.2 System Status Indicators................................ ................................ ............................. 35
5.2.1 Logic Controller LED Indicators ................................ ................................ ... 35
5.2.2 Power Supply LED Indicators................................ ................................ ........ 36
5.2.3 Logic Controller Software Alarms and Monitoring Parameters .................... 36
5.3 Removing and Replacing Failed Parts................................ ................................ ........ 36
Section 6. Specifications................................ ................................ .................... 37
Appendix A:TBD ................................ ................................ ......................... A-1
Parts & Accessories
A. Introduction................................ ................................ ................................ .......... Parts-1
B. Model Numbers................................ ................................ ................................ ... Parts-1
C. Suggested Spares................................ ................................ ................................ .Parts-2
D. Replacing Parts and Accessories ................................ ................................ ......... Parts-3
Page - vi - MR Booster Manual: (MN001808-1, 7/99)
Section 1. Introduction
1.1 About This Manual
This manual provides installation, operating, and maintenance instructions for the
MR Booster. It is intended for anyone who installs or maintains MR Booster
equipment.
Section 1. Introduction: Provides a brief overview of the manual contents and
terminology.
Section 2. System Description: Describes the basic functionality, features, and
technical details of an MR Booster.
Section 3. Installation: Explains the procedures for mounting the MR Booster and
making all connections.
Section 4. Setting Up for Initial Operation: Describes the procedures for
connecting and operating a local terminal.
Section 5. Troubleshooting: Describes the procedures for locating and fixing
problems that can occur in an MR Booster.
Section 6. Specifications: Lists mechanical, electrical, and environmental
specifications of the MR Booster.
Appendices
A. TBD
Parts & Accessories Order Information
Provides information about MR Booster model and part numbers, and suggested
spares.
MR Booster Manual (MN001808-1, 7/99) Page 1
1. Introduction
void any existing warranties.
CAUTION:
1.2 Conventions Used in This Manual
The following special notations are used to draw attention to particularly important
information:
WARNING! Warning statements alert you to situations that can
cause equipment damage. Failure to heed warning statements may
Caution statements alert you to situations that can
cause interruption or serious degradation of service. For optimum
system performance, observe caution statements.
NOTE: Notes contain helpful hints or reminders of important information.
1.3 Terminology
The following table lists the meanings of frequently used acronyms in this manual.
For descriptions of these system components, refer to Section 2.
Acronym Definition
BDA
BTS
MR
Bi-Directional Amplifier
Base Transceiver Station
Mikom Repeater
Table 1-1. Definitions
Page 2 MR Booster Manual (MN001808-1, 7/99)
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.
Figure 2-1 illustrates a typical MR Booster application with a repeater, and Figure 22 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.
MR Booster Manual (MN001808-1, 7/99) Page 3
2. System Description
• The Booster is available in one of two output power options (medium and high)
and four frequency ranges:
Band Uplink Downlink
AMPS800 full band 824-849 MHz 869-894 MHz
LMR8-00 full band 806-824 MHz 851-869 MHz
PCS1900 ADB band 1850-1885 MHz 1930-1965 MHz
PCS1900 extended EFC band 1875-1910 MHz 1955-1990 MHz
TO/FROM
BTS
DONOR
ANTENNA
PORT
REPEATER
Table 2-1. Frequency chart
REPEATER
PORT
MOBILE
ANTENNA
PORT
BOOSTER
COVERAGE
ANTENNA
MR
MOBILE
PORT
TO/FROM
MOBILE
SWITCHING
OFFICE
I2C BUS
CONTROL
Figure 2-1. Typical MR Booster Application (Repeater)
BTS
REPEATER
PORT
COVERAGE
ANTENNA
PORT
MR
BOOSTER
Figure 2-2. Typical MR Booster Application (BTS)
COVERAGE
ANTENNA
MOBILE
PORT
Page 4 MR Booster Manual (MN001808-1, 7/99)
Repeater or BTS
main port
PA
COMBINER/
SPLITTER
+26V-A
POWER AMPLIFIERS
+26V-B
PA
COMBINER/
SPLITTER
2. System Description
Main coverage
antenna
MOBILE
DUPLEXER
RPTR
DUPLEXER
Repeater or BTS
diversity port
+26V-A +26V-B
POWER
SUPPLY
A
+12V
Figure 2-3. MR Booster functional block diagram
2.3 Theory of Operation
A block diagram of the basic high-power MR Booster system is shown in Figure 2-3.
In order to simplify the discussion, a repeater-booster installation is assumed as in
Figure 2-1.
POWER
SUPPLY
B
MAIN LNA
DIVERSITY LNA
+12V
+26V
CONTROLLER
I2C
+12V
LOGIC
+12V
Diversity coverage
antenna
UL FILTER
CONTROL I/O
2.3.1 Downlink path
Duplexed RF from the repeater’s coverage antenna port is connected to the
booster downlink port. The repeater duplexer then routes the downlink signal
frequencies to the PA combiner/splitter module.
MR Booster Manual (MN001808-1, 7/99) Page 5
2. System Description
The downlink signal frequencies are then routed to the PA combiner/splitter
module by the repeater duplexer. In the high-power option, the RF is split
into four separate paths by the hybrid combiner/splitter module and
distributed to four RF PAs. In the medium-power option, the RF is split into
two separate paths and distributed to two RF PAs.
NOTE: The multiple amplifiers provide soft-fail redundancy to maintain
minimum output power capability should one or more fail in the field.
The PA outputs are summed in a second combiner/splitter, then routed to the
mobile-side duplexer. The duplexer routes the downlink RF output to the
coverage antenna, which transmits to handsets in the booster coverage area.
2.3.2 Uplink path
Mobile handset transmissions are received at the mobile duplexer port and
routed to the LNA input by the mobile duplexer. The amplified LNA output
is then routed to the repeater duplexer, which is connected to the installed
repeater’s coverage antenna port.
A diversity option offers a second, identical uplink path when diversity is in
use in the donor BTS or repeater.
2.3.3 System control
Control functions include PA keying, fan control, and uplink attenuation
setting. Monitored parameters include PA output power, status, system
temperature, power supply temperature, DC output voltage and status, and
input power source (ac or dc).
Resident software can be accessed via the supplied serial interface cable with
a laptop computer and terminal-emulation software to initialize and customize
the unit during installation or to perform troubleshooting.
The booster can be remotely controlled after installation with a Mikom MR
series repeater via the I2C bus interface cable.
For other applications, or if remote control is not required, a pair of relay
closure outputs from the booster can be user-configured and routed to the
donor system to flag system problems after installation.
Page 6 MR Booster Manual (MN001808-1, 7/99)
Power
Power
Mobile
Uplink
Logic
Controller
Board
Repeater
Combiner/
2. System Description
Supply
Splitter
Amplifiers
LNA
Duplexer
Duplexer
Figure 2-4. MR Booster (inside cabinet)
MR Booster Manual (MN001808-1, 7/99) Page 7
2. System Description
Power
Power
Combiner/
Splitter
Supply
Amplifiers
Figure 2-5. MR Booster (inside door)
Page 8 MR Booster Manual (MN001808-1, 7/99)
2.4 System Components
2.4.1 Power Supply
The MR Booster provides two high-efficiency power supplies with 26 VDC
and 12 VDC outputs (see Figures 2-4 and 2-5). The 26 V output is split
evenly between the system PAs to provide soft-fail redundancy. The 12 V
output is diode-connected at the controller and the LNAs, ensuring that both
will function if a power supply fails. The power supply has thermal
shutdown capability.
The AC supply input is auto-ranging to handle 115 and 220 volt, 50 or 60 Hz
systems. During loss of AC mains, the booster will automatically switch over
to the DC input for operation with a BBU.
2.4.2 Downlink Power Amplifier
The downlink power amplifiers (see Figure 2-4) provide low distortion
amplification of downlink RF signals using proprietary feedforward
correction techniques. After duplexer, splitter and combiner losses, the PAs
provide 20 dB nominal gain for the booster in the downlink signal path.
2. System Description
The amplifiers are powered by the 26 VDC output of the power supplies. To
provide maximum output power and soft-fail redundancy, the downlink power is
shared between either four (high-power option) or two (medium-power option)
PAs. Each PA provides output power and temperature status information to the
system controller and provides both overcurrent and overtemperature protection
circuitry.
2.4.3 Logic Controller Board
The logic controller board (see Figure 2-4) monitors and controls internal
booster functions, and provides alarms to the donor system. The controller
contains an I2C bus interface for remote control by a Mikom MR series
repeater. The controller is powered by the 12 VDC supply.
System configuration information is retained in an on-board EEPROM. For
installation or troubleshooting, the board-resident software can be accessed
from an MR repeater, or from an on-site laptop computer. The controller can
set:
• uplink gain
• PA key/unkey
• fan speed control (high/low/off)
MR Booster Manual (MN001808-1, 7/99) Page 9
2. System Description
The controller monitors the status of the following system components:
• PA power output
• PA temperature
• PA shutdown
• power supply temperature
• average 26 VDC and 12 VDC output voltages
• AC mains presence
• VSWR input (when installed)
The controller also routes the DC power to the VSWR module.
For general use, two alarm outputs are provided that can be user-configured
during installation. The outputs are normally open relay contact pairs, which
are closed when no alarm condition is present. These signals are provided on
four of the seven pins of a terminal block on the controller board.
2.4.4 PA Combiner/Splitter Module
The PA combiner/splitter module (see Figure 2-4) splits the input signal,
distributes it to the PAs and combines it after amplification. Identical hybrid
design is used to ensure maximum amplitude and phase matching of the
downlink signal.
2.4.5 Uplink Low Noise Amplifier
The LNA (see Figure 2-4) maintains dynamic range for uplink mobile
signals. The LNA provides low noise figure and high input IP3 so the booster
does not decrease sensitivity or increase distortion in the system.
The gain of the LNA chain after duplexer and cable losses is nominally 20 dB
with the uplink attenuation set to 0 dB. Using the internal software, the gain
can be reduced by increasing the attenuation in 1 dB steps up to 15 for
optimal IP3, or where equal uplink and downlink booster gain is not
necessary. The same LNA is used in the diversity option and the attenuation
setting is ganged so each uplink path is set for equal gain.
Page 10 MR Booster Manual (MN001808-1, 7/99)
2.4.6 Duplexers
CAUTION:
proper MIKOM part numbers.
The duplexers (see Figure 2-4) provide isolation between uplink and
downlink paths, and band-limit the signals that are either passed to the donor
hardware, or transmitted at the mobile antenna. The small repeater duplexer
provides adequate UL/DL isolation. The mobile duplexer offers low insertion
loss to maximize downlink output power and uplink noise figure. Forward
and reverse directional coupler outputs are provided on the mobile duplexer.
The coupler outputs are routed to the VSWR module when that option is
installed.
2.4.7 RF Cables
The RF cables are a critical part of the MR Booster, particularly in the
downlink function. Low loss provides maximum output power and cable
propagation delays must be properly controlled so that the amplifiers are
combined with low phase error.
2. System Description
Never substitute RF cables in the booster. Use only
2.4.8 Fan Assembly (High-power only)
Dual DC fans (not shown) maintain a low cabinet temperature in the high
power option. The fans are sealed to withstand all weather conditions. The
plenum and ducting structure of the booster is designed to move air over all
heat fins, even if one fan fails. The fans can be disabled or operated at low
speed for climates where over-heating will not be a problem. The logic
controller provides the fan interface.
2.4.9 VSWR Module (Optional)
The VSWR module (not shown) monitors the downlink output VSWR. The
customer is alerted to potentially damaging antenna mismatch. The module
receives ± 12 VDC from the controller and coupled outputs from the mobile side
duplexer. The coupled signals are processed the output VSWR is routed to the
logic controller.
MR Booster Manual (MN001808-1, 7/99) Page 11
2. System Description
2.4.10 Downlink Driver Amplifier (Optional)
An ultra-linear driver amplifier (not shown) provides more downlink gain or
boosts the linear output power. Contact technical support for availability and
details.
Figure 2-5. Input/output panel
2.4.11 Input/Output Panel
All system inputs and outputs are accessible from the bottom panel of the
cabinet (see Figure 2-5). All RF connectors are 7-16 female bulkhead. All
unused RF ports have gasketed plates covering the connector cutout.
Control, alarm, and power connections are made via multi-conductor cables
routed through weatherproof glands. Unused glands are filled with removable
plugs.
NOTE: The customer is responsible for ensuring a weatherproof seal on
glands not set up in the factory.
Following are the descriptions of the available I/O connections:
• Repeater Duplexer or DL (optionally repeater DL only): Connected to
the repeater’s mobile coverage antenna port. It accepts downlink signals
from the repeater and outputs the uplink RF to the repeater.
NOTE: If the MR Booster must interface with a non-duplexed system,
this port can be used to route the downlink output from the repeater to the
booster.
• Repeater UL (optional): This port is used only when the repeater has
non-duplexed mobile input and output. The uplink output is then routed
through this connector from the booster to the repeater.
Page 12 MR Booster Manual (MN001808-1, 7/99)
2. System Description
• Mobile Duplexer: Connected to the repeater’s coverage antenna.
• Diversity In (optional): The diversity coverage (mobile) antenna is
connected to the diversity input port.
• Diversity Out (optional): The diversity output is routed to the repeater’s
uplink diversity path input port.
• AC IN gland: The AC input cable is passed through this gland and
connected to the WAGO terminal block inside the cabinet.
• DC IN gland: If a DC input is used, the multi-conductor cable is passed
through this gland and distributed to the DC input connector of the power
supplies. Contact the factory for further details if using a customersupplied BBU or DC source.
• I2C gland: The I2C control cable is routed through this gland and
connected to the logic controller board inside the cabinet. The far end of
the cable is connected to the MR series repeater control bus.
• BBU signal gland: This gland is provided to interface to a BBU alarm or
sense output.
MR Booster Manual (MN001808-1, 7/99) Page 13
3.1 Introduction
This section describes the procedures for installation of an MR Booster and system
optimization. The Installation Checklist at the end of this section provides a concise
summary of the installation steps. Section 4 will provide initial software instructions.
3.2 Site Selection
The site chosen for the MR Booster must meet requirements related to location,
power, space, mounting surface, environment, and antenna isolation.
3.2.1 Equipment Inventory
The following table lists items shipped with the MR Booster. Use a separate
table for each booster installed.
Section 3. Installation
MR Booster
Site: Installer:
q MR Booster
Tuck Pack:
q Manual
q 6mm T-handle wrench
q 4mm T-handle wrench
q 3mm T-handle wrench
2
q I
C bus cable
q Serial cable
q Drilling template
q Keys for security cover
Serial #:
Serial Part #:
MN001808-1
G71A0031-2
G71A0031-3
G71A0031-1
G15A0309-1
G15A0327-1
G27AT000-1
???N/A
Table 3-1. Equipment List
MR Booster Manual (MN001808-1, 7/99) Page 15
3. Installation
3.2.2 Installation Tools and Equipment
You will need the following tools and equipment for installation of the MR
Booster:
Factory supplied:
• 6mm T-handle wrench to mount cabinet to bracket
• 4mm T-handle wrench to open/close cabinet door
• DB-9 to DB-9 serial control cable
• I2C bus cable (if applicable)
Customer supplied:
• M8 carriage bolts, flat washers, split lock washers, and drivers to bolt the
mounting bracket to a wall or pole
• Laptop computer with serial port and terminal emulation software (e.g.,
ProComm)
• Coaxial RF cables terminated with a 7-16 male connector
ü for donor port
ü for repeater port or RX port (if applicable)
ü for diversity input (if applicable)
ü for diversity output (if applicable)
ü for TX port (if applicable)
• >30 dB, 60 W attenuator
• RF power meter with 20 dBm power-handling capability
• Miscellaneous RF test cables and adapters
3.2.3 Site Requirements
Space: The MR Booster dimensions are 742 mm (H) x 466 mm (W) x 287
mm (D) (29.2 x 18.3 x 11.3 inches) with fans, 535 mm (H) (21.1 inches)
without fans. Allow a minimum of 500 mm in front of the booster for door
clearance, 30 mm below for cable access, and 150 mm on either side for
access to mounting hardware.
Mounting surface: The cabinet should be mounted to a vertical surface with
a load-bearing capacity of at least 55 kg. It may be mounted to a wall or a
pole.
Page 16 MR Booster Manual (MN001808-1, 7/99)
Environment: The MR Booster is in a weatherproof cabinet that can be
operated at ambient temperatures between -30°C to +55°C.
Power: The cabinet requires 90-264 VAC, 50-60 Hz at 600 Watts maximum,
or 21-28 VDC, 20 Amps maximum (when equipped for DC operation).
Antenna isolation: When the MR Booster is used with a repeater, the
isolation between the donor and mobile antennas must be at least 15 dB
greater than the composite system gain of the repeater plus booster for
optimum performance.
3.3 Installation
3.3.1 Mechanical
Use the supplied template, shown in Figure 3-1, to drill holes to mount the
MR Booster mounting bracket. Install the mounting bracket with two M8
carriage bolts for pole mounting, and four M8 carriage bolts for surface
mounting. Use a flat washer and split lock washer under the head of each
bolt.
3. Installation
WARNING! The MR Booster may weigh up to 51 kg
(112.4 lbs), depending on options; use two people to lift the
booster onto the mounting bracket.
Lift the repeater up and set the top M10 screws into the recesses provided in
the top of the mounting bracket. Align the holes in the cabinet with the holes
in the mounting bracket, then install and tighten the four M8 socket-head cap
screws using the supplied 6mm T-handle wrench.
To access the inside of the cabinet (see Figure 3-2), use the supplied 4mm Thandle wrench to unscrew the four M5 socket-head cap screws that secure the
door to the main cabinet.
MR Booster Manual: (MN001808-1, 7/99) Page 17
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