User Manual
Band Selective Repeater
User Manual
2012 February
Information in this manual is subject to change without notice
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User Manual
Table of Contents
1. How to Use this Manual............................................................................................................ 3
1.1 Introduction ............................................................................................................ 3
1.2 Structure .................................................................................................................. 3
1.3 Prior to Installation ............................................................................................ 3
2. Technical Specifications............................................................................................................ 4
3. Product Introduction ................................................................................................................. 5
3.1 Description.............................................................................................................. 5
3.2 System Diagram ................................................................................................... 6
3.3 Product Features ................................................................................................. 7
3.4 Applications Example-- Shadow Coverage ............................................ 7
4. Operation & Software ............................................................................................................... 8
5. Package List ............................................................................................................................ 11
Important Notice:
Don’t connect electrical power line to repeater before
donor and service antenna connects to repeater.
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1. How to Use this Manual
1.1 Introduction
It is recommended that you read this manual prior to installing the Outdoor Band Selective
Repeater. This manual gives you a complete guide for how to install, operate and maintain
the product.
1.2 Structure
This manual describes the basic diagram and features, and provides overall and detailed
functional descriptions of the repeater. Also, this manual describes how to survey, install
and operate the equipment. The manual is divided into 4 chapters. The overall contents of
this manual are as follows:
Chapter 1 - How to Use This Manual
Chapter 2 - Technical Specification
Chapter 3 - Product Introduction
Chapter 4 - Operation and Software
1.3 Prior to Installation
A thorough study of the site conditions and transmission path requirements should be
undertaken prior to installing the repeater system. The location of antennas, repeater and
cable lengths are all important considerations that must be addressed.
The repeater has been designed for simple easy installation requiring no special tools.
With just a few site preparation tasks out of the way, installation can be accomplished in
several hours.
Notice:
Redutelco Technology CO., LTD. has the copyright of this manual. Without written
permission of Redutelco, no part of this document may be reproduced, transmitted,
or translated in any form, by any means or for any purpose.
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2. Technical Specifications
Specification
Items
Uplink Downlink
Frequency Range (Customized) 1850～1910MHz 1930～990MHZ
Gain (Customized) ≥93 dB ≥ 95 dB
Output Power (Customized) 33±2 dBm 37±2 dBm
Gain Adjustment Range ≥ 30 dB
Gain Adjust precision 0～10dB/±1dB#10～20dB/±1.5dB#20～31dB/±2dB
ALC Scope ≥ 20dB
In-Band Ripple ≤ 3 dB
Out-of-Band Suppression ±600kHz > 30dB, ±1MHz > 40dB, ±5MHz > 50dB,
I/O Impedance 50 Ω
VSWR ≤1.5
Load VSWR Tolerance 20:1
Noise Figure ≤ 5dB
Inter-modulation Attenuation 45dBc
Spurious Emission ≤-36dBm(9KHz～1GHz)/≤-30dBm(1～12.75GHz)
System Delay ≤ 5μs
Max Input Power Level(1minute) -10dBm
RF Connector N-Type (Female)
Temperature Range Operation: -25°C ~ + 55°C;Storage: -30°C ~
+60°C
Relative humidity 5~95% RH
Power consumption 200W
Power Supply (Customized) AC220V
Power Supply socket (Customized) BP3 Type
Dimensions 454mm×340mm×160mm
Weight 15kg
Shipment Dimensions 530mm×420mm×240mm
Shipment Weight 18kg
Cabinet Color Silver white
Installation Wall-mounted
RG45 Interface Local : Base on Embedded Web Server
Monitor/Setting Parameter Power, Gain, VSWR, Alarm, Switch
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3. Product Introduction
3.1 Description
The Band Selective Repeater is a bi-directional amplifier used to enhance signals
between a mobile and a base station. This repeater type is used for digital systems-
GSM/CDMA/DCS/UMTS network.
1) -It picks up the strongest signal from BTS via the Donor Antenna,
2) -Linearly amplifies the signal and then retransmits it via the Indoor Signal
Distribution System to the weak/blind coverage area.
3) -And the mobile signal is also amplified and retransmitted to the BTS via the
opposite direction.
It features with flexible installation, cost-effectiveness and ideal coverage solution, its
output power varies from 33dBm to 43dBm. Available in a wide range of RF powers, this
repeater extends the coverage area of mobile networks where installation of additional
BTS is not financially.
Band selective repeaters are commonly used in situations where large numbers of
frequency carriers are to be repeated or when base station synthesized frequency
hopping is used.
Band selective repeaters do not separate out specific carriers but amplify and retransmit
all signals within a defined frequency band. Inter-modulation distortion caused by band
selective repeaters usually means that lower output power per carrier can be realized
compared to channel selective repeaters.
The adjustable frequency band allocation is a feature enabling less noise and interference
caused by signals from operators' selective frequency band.
A band selective repeater with fixed band width has fixed filters for a certain band width.
A band selective repeater with adjustable band width has filters that can be set to various
band widths.
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3.2 System Diagram
) The signal from the base station is received via the repeater Donor antenna and is
then forwarded through a duplex filter (DPX), is amplified in a low noise amplifier
(LNA), and enters the band selective amplifier board (BSA).
) The first mixer stage on the BSA amplifier board, which is controlled by a
synthesizer, converts the received frequency down to the IF frequency. The signal
is then filtered by a SAW band-pass filter and amplified before it is fed to the
second mixer stage, controlled by the same synthesizer as the previous one, for
converting back to the original frequency.
) The SAW filter can be either fixed or adjustable depending on the BSA board used.
If the BSA board has fixed band width, this SAW filter is fixed and selected for the
current band width. If the BSA board has adjustable band width, the SAW filter can
be software changed.
) The output signal from the mixer is then amplified in the power amplifier, which is
controlled by the CU. The output gain can be reduced to avoid instability due to
poor antenna isolation. If necessary, reduce the output power to keep it under a
maximum level.
) The output signal passes a duplex filter (DPX), before it is fed to the repeater MS
antenna which retransmits the signal at the same frequency to the aim areas.
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3.3 Product Features
) Oscillation suppression feature (IF filtering Technology)
) High selectivity hence excellent out-of-band signals rejection
) Low noise and highly linear RF performance
) Smart ALC (Automatic Level Control) for optimal linear output power
) System Monitor through RJ45 port with easy to view GUI for local supervision or
GMS SMS to communicate with the NMS that can remotely supervise repeater’s
working status and download operational parameters to the repeater(Optional).
) Designed for all outdoor installation – waterproof, damp-proof and Omni-sealed
(IP65)
3.4 Applications Example-- Shadow Coverage
A valley is shaded by hills. There is a base station 5 kilometres away, but the lowest signal
strength in the valley is less than –100dBm. A mast used for other purposes is available
for a repeater installation. The mast height is 42 meter and it is located on a hill. The
scenario is illustrated as following picture.
1) The signal strength (includes donor antenna) from donor BTS must be 5dB larger
than from neighbour BTs in GSM network and larger>-50dBm, so the repeater can
amplifier in high efficiency with full output power.
2) The donor antenna should have line of sight (LOS) with the BTS antenna. If the signal
strength is adequate, LOS may in some cases not be necessary.
3) Donor antenna gains are typically 18 to 25 dB, and have a horizontal and vertical
beam width of less than 30° to correctly select the donor BTS.
4) There is large physical separation between the antennas in order to prevent
degradation of signal quality and risk of oscillation (Antenna isolation). Ways to
achieve this can be usage of highly directional antennas with good front-to-back
interference ratio or external shielding between the antennas. Another option is to use
a Frequency Translating Repeater or ICS repeater.
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4. Operation & Software
Port Connection Usage
BTS Connect to Donor antenna Receive BTS signal source
MS Connect to Service antenna Retransmitted signal to target coverage area
LAN Connect to Laptop LAN port Set and inquire repeater parameter and status
LED Repeater RF Switch indicator LED ON when repeater RF switch on or Alarm
Step 1:
Connect repeater LAN port to laptop LAN port via attached LAN cable;
Step 2:
Open laptop network connection
Step 3:
Set laptop IP address and Mask as following picture.
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Notice:
1) The repeater default IP address is 192.168.1.160, and subnet mask is
255.255.255.0
2) The laptop ip address be set like 192.168.1.X, X=1~159 and 161~254
Step 4:
Run IE, and input IP: 192.168.1.160, then Enter
Step 5:
Set RF switch ON/OFF and/or set Downlink and uplink attenuation(0~31)
then click Button Submit;
Inquire Repeater working status, such as temperature, downlink input value
by click Button Refresh;
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5. Package List
No Item description Remark
1 LAN Cable Connect to Laptop LAN port 1pcs
2 RS232 Cable Connect to Laptop RS232 port 1pcs
3 Grounding Cable Repeater grounding 2pcs
4 Mounting Ears Repeater installation bracket 4pcs
5 Fixing Screw Fix mounting ears to wall or 12pcs
poll
6 Expansion Screw Install repeater to wall or poll 4pcs
- .
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