The information contained herein is proprietary to Shyam Telecom Limited.
Unauthorized access, copy and replication are prohibited. This document must not
be copied in whole or part by any means or it shall not be disclosed or d ivulged to
any third Party without the prior written consent of Shyam Telecom Limited.
Proprietary Information
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1. Document History
Document
Number
R4 Band
Document
Name
Selective
Document
date
June
2007
Author Edited
by
Approved by Revision
Repeater
Revision Revised Section Date/Sign
2. Disclaimer
Every attempt has been made to make this material complete, accurate, and
up-to-date. Users are cautioned, however, that Shyam Telecom Limited
reserves the right to make changes without notice and shall not be
responsible for any damages including consequential, caused by reliance of
the contents presented, including, but not limited to, typographical,
arithmetical, or listing errors.
Product name(s) referenced in this document may be trademarks or
registered trademarks of their respective companies, and are hereby
acknowledged.
In areas with unstable power grids (mains) all repeaters must be installed
with a voltage regulator ensuring a constant voltage level at the repeater
power input. A maximum voltage deviation should remain within the input
range to the repeaters for warranty purposes.
All antennas must be installed with lighting protection. Damage to internal
modules, as a result of lightning is not covered by the warranty.
3. Safety Instructions and Warnings
3.1. Personnel Safety
Before installing or replacing any equipment, the entire manual should be
read and understood. The user needs to supply the appropriate AC power to
the Repeater. Incorrect AC power settings can damage the repeater and
may cause injury to the user.
Throughout this manual, there are "Caution" warnings, "Caution" calls
attention to a procedure or practice, which, if ignored, may result in injury or
damage to the system or system component or even the user. Do not
perform any procedure preceded by a "Caution" until the described
conditions are fully understood and met.
3.2. Equipment Safety
When installing, replacing or using this product, observe all safety
precautions during handling and operation. Failure to comply with the
following general safety precautions and with specific precautions described
elsewhere in this manual violates the safety standards of the design,
manufacture, and intended use of this product. Shyam Telecom Limited
assumes no liability for the customer's failure to comply with these
precautions. This entire manual should be read and understood before
operating or maintaining the repeater system.
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CAUTION
Calls attention to a procedure or practice which, if not followed, may result
in personal injury, damage to the system or damage to individual
components. Do not perform any procedure preceded by a
CAUTION until described conditions are fully understood and met.
WARNING! This equipment complies with FCC & IC radiation exposure limits
set forth for an uncontrolled environment. This transmitter must not be colocated or operating in conjunction with any other antenna or transmitter.
The unit with server antenna must be installed to provide minimum 40 cm
separation distance between the server antenna and the body of user or
near by person. The donor antenna used for this transmitter must be fixedmounted on outdoor permanent structures with a separation distance o f at
least 1.5 meters from all persons during normal operation.
The RF electric performance of the repeater conforms to FCC requirement o f
the inter modulation and spurious emission. It avoids interference problems.
3.3. Electrostatic Sensitivity
CAUTION
ESD = ELECTROSTATIC DISCHARGE SENSITIVE DEVICE
Observe electrostatic precautionary procedures.
Semiconductor transmitters and receivers provide highly reliable
performance when operated in conformity with the intentions of their design.
However, a semiconductor may be damaged by an electrostatic charge
inadvertently imposed by careless handling.
Static electricity can be conducted to the semiconductor chip from the centre
pin of the RF input connector, and through the AC connector pins. When
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unpacking and otherwise handling the Repeater, follow ESD precautionary
procedures including the use of grounded wrist straps, grounded workbench
surfaces, and grounded floor mats.
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4. Introduction
4.1. Purpose
The purpose of this document is to describe the electrical and mechanical
specifications, operation and maintenance of the R4 Band Selective
Repeater.
4.2. Scope
This document is the product description of the Shyam R4 Band Selective
Repeater for Indoor applications.
4.3. Definitions
AGC
ALC
APC
BCCH
BTS
BSEL
CDMA
CMC
CMB
CSEL
Automatic Gain Control
Automatic Level Control
Automatic Power Control
Broadcast Control Channel
Base Transceiver Station
Band Selective
Coded Division Multiple Access
Configuration & Monitoring Console software
Combiner Unit
Channel Selective
DCS Digital Communication System
DL Downlink signal (from base station via repeater to
mobile station)
EGSM
ETSI
GSM
LAC
LED
LNA
LO
MS
Extended Global System for Mobile Communication
European Telecommunications Standard Institute
Global System for Mobile communication
Location Area Code of the BTS site
Light Emitting Diode
Low Noise Amplifier
Local Oscillator
Mobile Station
MSC Mobile Switching Center
NMS
Network Management System
PCN Personal Communication Network
PCS
Personal Communication System
PSU Power Supply Unit
RF
RMS
RSSI
RTC
UL (Uplink)
Radio Frequency
Remote Management System
Received Signal Strength Indication
Real Time Clock
Uplink signal direction (from mobile station via
repeater to base station)
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4.4. References
[1] ETS 300 086.
Radio Equipment and Systems Land mobile service Technical
characteristics and test conditions for radio equipment with an internal or
external RF connector intended primarily for analogue speech.
[2] ETS 300 609-4.
Digital cellular telecommunications system (phase 2): Base Station
Systems (BSS) equipment specification: Part 4: Repeaters.
[3] ETS 300 342-3
Radio Equipment and Systems (RES); Electro-Magnetic Compatibility
(EMC) for European Digital Cellular Telecommunications systems. Base
Station Radio and ancillary equipment and Repeaters meeting phase 2
GSM requirements.
4.5. General
Mobile Communications Systems are planned as cellular systems and each
cell of the base station is required to provide RF coverage over a certain
geographical area as per defined RF power levels. Due to the RF
propagation properties, even using high radiated RF powers or complicated
antenna systems, there are zones within the coverage area where the RF
signal strength from base station remains inadequate for establishing the
desired connectivity to mobile users.
Repeaters traditionally are deployed in the Mobile Communication Network
to fill in the “Dead Zones” caused by blocking of signals by geographic
topologies such as mountains, valleys, dense foliage, high rising urban
landscapes and other man-made structures. The distance from the base
station also adversely affects the RF signal strength. The user views
repeaters as a means to extend base station coverage so as to reduce the
number of base stations and thereby accelerate network availability.
Repeater systems are installed after meticulous planning between BTSs and
the mobile users to provide RF coverage in the shadowed regions. Repeater
systems are available for different applications and ultimate choice shall
depend on some of the factors mentioned below:
• Area to be provided with coverage.
• Indoor/outdoor coverage.
• Availability of BTSs in the vicinity.
• Antenna isolation to be achieved.
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5. Functional Description Of R4 Band Selective Repeater
5.1. General Description
The R4 Band Selective Repeater System is designed to provide indoor
coverage and can handle signals in single sub band in any one of the service
bands, used around the World by various service operators. It provides
highly selective amplification in the pre-set band. The details of operating
service frequency bands are given below:
S.NO. Service Band DL Frequency (MHz) UL Frequency (MHz)
1. SMR 800
2. Cellular
3. SMR 900
4. EGSM
5. GSM 900
6. DCS
7. PCS
8. UMTS
851-869 806-824
869-894 824-849
935-941 896-902
925-960 880-915
935-960 890-915
1805-1880 1710-1785
1930-1990 1850-1910
2110-2170 1920-1980
[The Customer is advised to refer to the packing note giving the details of
frequency band set & the bandwidths of different sub bands equipped in the
repeater: Only SMR800 Band is subject to this FCC Application w/ FCC ID: S3CR4-30-S8]
•The repeater adopts duplex mode and bi-directional amplification for
U/L & D/L signals between the base station and mobile users. It has
been designed for outdoor applications to meet the requirements of
large number of users in the targeted area.
• It conforms to ETSI standards & safety requirements.
• The system can be incorporated with optional Remote Management
System (RMS). It enables status monitoring, remote configuration &
speedy maintenance.
•The system can be customized to meet the requirement of user for
coverage by making provision for radiating required RF power in the
DL/UL paths to achieve the coverage. The System is incorporated
with monitoring facility through USB port with easy GUI interface.
•It intercepts signals from the BTS through a DONOR antenna (highly
directional outdoor antenna) and distributes the signals to mobile
users after amplification through SERVER antennas (omni
directional) system in the D/L.
•In the U/L, the signals from the mobile users are picked up by
SERVER antenna and retransmitted to the BTS after processing &
amplification in the repeater.
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The repeater consists of the following modules/units:
• LNA
• Converter modules
• Power amplifiers
• Power supply modules
• Duplexer filters for transmit/receive directions
• Supervisory module
• A metallic case houses the repeater. Arrangement is made for heat
dissipation especially for amplifiers, which generate more heat. The
choice of suitable metal as the case material gives a lightweight
design with good heat conduction. The housing is not waterproof
since it is to be used for indoor application.
Next Generation
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Ceiling
Antenna
R4 Unit
Figure 1: Indoor Coverage (Typical Application)
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R4-30SMR800
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Ceiling
Antenna
Figure 2: Indoor Coverage In a Office Premises
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