User's Manual

ManualsBrandsINKEL ManualsElectronicsCDMA Fiber-Fed Repeater System

1. Overview

Figure 1. System Configuration

Optic repeater is a type of BTS sub-systems. It is designed to cover the radio-

shadowed areas that could be occurred by obstructions among base stations. The

system provides high quality communication at reasonable cost by adopting high

technologies. For example, the system adopted WDM that multiplexes UL and DL

signals onto a single fiber cable, so that the system can be installed at low cost and

maintained with ease.

2. Major Advantages

A. REMOTE

1) It is easy to install and maintain the system, because it is designed as small size, light

weight, and low power consumption.

2) It is reliable by adopting water and moisture resistant structure.

3) Remote control

Operation, maintenance, and repair is easy by using the system that provides alarm

and information on the Gain Control of Remote Cell, output level control, power on/off,

internal temperature monitoring, and problems concerning optic module. Remote

control can be performed by RF modem so that operation and maintenance personal

can use it easily. And it was designed to operate with comprehensive network

management system.

4) Transmission and Receiving with 1 Core Optic Fiber

It use WDM which enables 2 wave-length (Forward: 1550nm, Reverse: 1510nm) to

Base Station

BTS

Donor

Remote

Summary of content (9 pages)

PAGE 1
. Overview Base Station BTS Remote Donor Figure 1. System Configuration Optic repeater is a type of BTS sub-systems. It is designed to cover the radioshadowed areas that could be occurred by obstructions among base stations. The system provides high quality communication at reasonable cost by adopting high technologies. For example, the system adopted WDM that multiplexes UL and DL signals onto a single fiber cable, so that the system can be installed at low cost and maintained with ease. 2.
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simultaneously be transmitted and received through 1 Core Optic Fiber 5) Optic AGC (Automatic Gain Control): It is regularly keeping the loss between optic sections. 6) ALC (Automatic Limit Control): It makes to limit the level of output power less than the regular level. B. DONOR 1) It is easy to install and maintain the system, because it is designed as small size, light weight, and low power consumption.
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. The name and function of each module A. REMOTE OPTIC BATTERY UL_1 UL_1 DL/UL_0 DL/UL_0 AC_IN BATTERY AC_OUT AC_IN OPTIC Figure 2. A plan of Remote 3.1 Interior Module ① Optic It changes the optic signal (from Donor) into RF signal and RF signal (from Remote) into optic signal. ② DL_UL Drive The module changes the level of a signal on DL path into the desired level. It has a variable attenuator. The antenna output level on DL path is adjustable by the attenuator.
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It generates local signals for band selection on UL paths. It performs FSK modulation and demodulation for communication between Donor and Remote. ⑤ LPA (30Watts) It is amplified into high output power for transmitting the Down Link signal to antenna. ⑥ LNA It amplifies signals from antenna for achieving good characteristics of noise figure. ⑦ Cavity filter It deletes useless signals except band that is used for service. DL/UL signals are already distinguished at part of Antenna.
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B. DONOR - Donor Shelf - 3.3 - Donor Enclosure – Interior Module ① optic It changes the optic signal (from Remote) into RF signal and RF signal (from Donor) into optic signal. ② DL Drive This module changes the forward signal into optimum level and has attenuation for setting the input level of optic module. It contains saw filters for band selection. It contains FSK modem for communication with remote. ③ UL Drive It amplifies the output signal of optic module for getting optimum level.
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⑤ Wireless Modem & control board They make the signal for communicating the upper systems. The communication is for receiving and sending the alarm and control signals. Also, the data including the information of product is communicating with MCU. ⑥ PSU It changes the input power (110~230VAC) into DC+27V, DC+15, and DC+7V for operating each module. ⑦ MCU It has a computer interface. The operator can monitor several kinds of alarms and control the system by using the connected computer. 3.
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4. How to install the system Typical Installation Instructions Checking the contents Install Repeater inside at convenient location on a wall Fix repeater body on a wall Installation exterior antenna & Laying Feeding Measurement of Receiving Level from Base Station Connect power supply adapter Testing for calling quality Inspection Completion A. Checking the contents B. Put the repeater at the place where to install it C. Install Repeater inside at convenient location on a wall D.
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iii. Verify Channel Power value of input signal. F. Connect to RF Cable G. Connect power supply adapter Caution: Should check the input power whether 50~88VAC.(For Remote) Caution: Should check the input power whether 110~230VAC.(For Donor) H. Testing for calling qualities 5. User Attention 1) Do not open the case of repeater 2) Do not excessive pressure to Repeater. 3) Please use a rated voltage. 4) The repeater must have been installed considering environmental factor. 6.
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7. Specifications 7.1 General System Electrical Specifications Characteristic Specification DL: 1930.625 ~ 1989.375MHz Frequency UL: 1850.625 ~ 1909.375MHz Frequency bandwidth 58.75 MHz (DL/UL) Channel bandwidth and spacing Applying to CDMA Frequency Assignment System time delay 5 ㎲_max Characteristic impedance 50 ohm 7.2 DL Path specifications(Remote) Remote Donor Input power range -34 ~ -24dBm/total -3 ~ +7dBm/Total Gain 61~77dB -2dB Gain control step 0.5dB 0.