Hongxin GZF9003-V User manual

HX/SM/GZF9183-V/RB.0
GZF9183-V
GSM Frequency Shifting Repeater
User’s Manual
September 2004
Version 00.00.01

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Wuhan Research Institute of Posts and Telecommunications
Wuhan Hongxin Telecommunication Technologies Co., Ltd.
September 2004
Copyright © 2004 Hongxin Telecommunication Technologies Co., Ltd
Wuhan P. R. China
All rights reserved.
No part of this documentation may be excerpted, reproduced, translated,
annotated or duplicated, in any form or by any means without the prior written
permission of WRI Hongxin Telecommunication Technologies Co., Ltd
Fiberhome Group.Hongxin Co.
88 Youkeyuan Rd.HongshanDist.Wuhan,P.R.China
Website: http://www.wri.com.cn http://www.hxct.com
Post Code: 430074
Customer Support Center: ([phone])
Fax: [phone])
E-mail:[email protected]

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Preface
GZF9183-V Frequency Shifting Repeater of GSM Mobile Communication is an important
part for constructing a hybrid GSM mobile communication network. It mainly serves to
receive and amplify uplink and downlink radio frequency (RF) signals so as to extend the
coverage of BTS.
This Technical Manual deals with the principles, functions, structure, installation,
debugging, operation, maintenance, and transport etc of the GZF9183-V Frequency
Shifting Repeater and is intended to guide users to properly install, operate and maintain
the GZF9183-V Frequency Shifting Repeater.
Statement: The actual product may differ from what is described in this manual
due to frequent update of WRI Hongxin products and fast development of
technologies in the future. Please contact the local WRI Hongxin office for the
latest updating information of the product.
Notice:
1 Based on users’ need, the actual working frequency of WRI repeater is
to be customized. In this manual, we provide the repeater with
frequency 935-960MHz for downlink and 890-915MHz for uplink.
2 Based on users’ need, the power supply AC input voltage value
provided by WRI is to be customized, either. In this manual, we provide
repeater with 220V/50Hz AC or 48V DC power supply; in fact,
110V/60Hz AC power supply is also optional.
3 Based on the users’ need, the output power of both downlink and
uplink is to be customized, and the output power range is from 0.5W to
10W for uplink and from 2W to 40W for downlink.
4 Based on user’s need, the way for band selecting is to be customized,
broadband, band selecting or channel selecting is optional. In this
manual, we provide repeater with channel selecting.
5 About GZF9183-V, here “900” stands for working frequency, “3” stands
for country code named by Hongxin, and “V” stands for repeater type.

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CONTENT
1. SYSTEM OVERVIEW..........................................1
1.1 Overview.............................................................................................1
1.2 Scope of Application of the Equipment...................................3
1.3 Major Features of the Equipment...............................................3
1.4 Basic Principle..................................................................................4
2. WORKING PRINCIPLE & TECHNICAL
INDICES.................................................................................6
2.1 Working Principle............................................................................6
2.2 Product Features.............................................................................7
2.3 Technical Indices...........................................................................10
2.3.1 Major Technical Indexes........................................................................................................10
2.3.2 Ambient Environment Condition............................................................................................10
2.3.3 Power Supply Requirements.................................................................................................10
2.3.4 Mechanical Characteristics ................................................................................................... 11
2.3.5 Interfaces .............................................................................................................................. 11
3. SYSTEM COMPOSITION..............................12
3.1 RF Unit...............................................................................................12
3.1.1 Duplexer................................................................................................................................12
3.1.2 PA .........................................................................................................................................13
3.1.3 RFF1/2``-50 Cable ................................................................................................................14
3.2 M&C....................................................................................................15
3.3 Power Supply Unit.........................................................................16

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3.4 Accessories.....................................................................................17
3.4.1 Outdoor Omni Directional Antenna........................................................................................17
3.4.2 Directional Panel Antenna.....................................................................................................18
3.4.3 Yagi Antenna .........................................................................................................................19
3.4.4 Short Backfire Antenna .........................................................................................................20
3.4.5 Arrestor .................................................................................................................................21
3.4.6 1/2 Inch Super Suppleness Cable.........................................................................................22
4. EQUIPMENT TEST & DEBUGGING....23
4.1. Test Condition, Instruments, Meters & Relevant
Accessories............................................................................................23
4.1.1 Test Condition .......................................................................................................................23
4.1.2 Instruments, Meters & Relevant Accessories........................................................................23
4.2. Testing Frequency Band(To be customized)......................23
4.3. Testing Method & Procedure....................................................23
4.3.1 Maximum Output Power........................................................................................................23
4.3.2 Maximum Gain ......................................................................................................................24
4.3.3 Auto Level Control (ALC) ......................................................................................................24
4.3.4 Gain Adjustment Range ........................................................................................................25
4.3.5 Gain Adjustment Step Length & Error ...................................................................................25
4.3.6 Ripple In Band ......................................................................................................................26
4.3.7 Voltage Standing-Wave Ratio................................................................................................26
4.3.8 Spurious Emission.................................................................................................................27
4.3.9 Uplink SNR ...........................................................................................................................27
4.3.10 Group Time Delay ...............................................................................................................28
4.3.11 Noise Figure ........................................................................................................................29
5. CONSTRUCTION PROCESS.....................30
5.1 Construction Flow.........................................................................30
5.1.1 Reconnaissance of Works ....................................................................................................31
5.1.2 Engineering Design...............................................................................................................32
5.1.3 Organization of Construction.................................................................................................33
5.1.4 Opening & Self-Examination of the Construction ..................................................................36
5.1.5 Organization for Construction, Inspection & Acceptance ......................................................37
5.2 System Installation........................................................................39

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5.2.1 Installation Flow ....................................................................................................................40
5.2.2 User’s Cooperation ...............................................................................................................40
5.2.3 On-site Survey ......................................................................................................................41
5.2.4 Installation Tools....................................................................................................................41
5.2.5 Technical Documentation ......................................................................................................41
5.3 Installation Conditions.................................................................41
5.3.1 Basic Installation Conditions .................................................................................................41
5.3.2 Recommended Environment Requirements..........................................................................42
5.4 Equipment Check..........................................................................42
5.4.1 Counting the Goods ..............................................................................................................42
5.4.2 Unpacking Inspection............................................................................................................43
5.5 Installation of the Main Chassis of the GZF9183-V
Repeater...................................................................................................43
5.6 Antenna Feeder Installation.......................................................50
5.6.1 Laying Cables .......................................................................................................................50
5.6.2 Installation of the Service Antenna & Feeder ........................................................................53
5.6.3 Making Joint..........................................................................................................................53
5.6.4 Precautions for Antenna Feeder Installation .........................................................................54
5.7 Grounding & Power Supply Connection...............................55
5.7.1 Equipment Grounding ...........................................................................................................55
5.7.2 Power Supply Connection.....................................................................................................58
5.8 Installation of Embracing Pole & Antenna Bracket (for
tower)........................................................................................................59
6. SITE OPENING & DEBUGGING.............62
6.1 Tools for Opening..........................................................................62
6.2 Details for Opening.......................................................................63
6.2.1 Check on Process .................................................................................................................63
6.2.2 Implementation of Equipment Test ........................................................................................64
6.2.3 Implementation of System Test .............................................................................................66
6.2.4 Implementation of Network optimization ...............................................................................67
6.2.5 Collection of Opening Data ...................................................................................................69

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7. SYSTEM MAINTENANCE.............................71
8. PRECAUTIONS......................................................72
9. TRANSPORTATION & STORAGE........73
9.1 Transportation ................................................................................73
9.2 Storage..............................................................................................73
10. APPENDIX TERMS &
ABBREVIATIONS.......................................................74

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1. System Overview
1.1 Overview
In GSM mobile communication system, limited by the coverage of base
station or by geographic environment, the transmission of signals may
be influenced by shadow or semi-shadow in some areas, generally
referred to as dead zone or semi-dead zone, bringing serious impact on
voice quality or even causing failure to normal communication. To solve
this problem, apart from adding more base stations, the deployment of
mobile communication repeater, characterized by quick expansion of
coverage and reduction of cost, shall be an ideal cost-effective choice of
high efficiency.
Frequency Shifting Repeater of mobile communications is an
important tool to expand network coverage, reduce network cost and
realize network optimization. Frequency Shifting Repeater of GSM
mobile communications is meant to amplify communication signal,
extend network coverage, to improve communication quality by
amplifying some weak received signals and expanding the signal
coverage and to distribute traffic load in various base stations with
efficiency. In the course of network optimization, Frequency Shifting
Repeater of GSM mobile communications offers a wide variety of
application. In some areas, such as satellite cities of some large cities,
remote residential areas, countries and towns or other dead zones or
shadow areas formed due to the natural or human obstacles (such as
high mountains, large buildings, tunnels or underground stores),
Frequency Shifting Repeater of GSM mobile communications shall be
the most economical and reasonable solution to the effective coverage

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of these networks since these areas are demanding a greater coverage
rather than capacity. Frequency Shifting Repeater of GSM mobile
communications is cheap with easy installation. It will greatly reduce the
investment in equipments and running cost to expand the network by
Frequency Shifting Repeater.
GZF9183-V Frequency Shifting Repeater provides operators with
multiple solutions that can save the investment in equipments and
running maintenance cost without lowering the network quality. As a
supplement to GSM base stations, in the areas with some dead zones,
the coverage of GSM network can be easily expanded to the dead
zones that need covering to solve the problem of coverage.
By using GZF9183-V Frequency Shifting Repeater of mobile
communications of excellent performances manufactured by Wuhan
Hongxin Telecommunication Technologies Co., Ltd, the
surplus capacity of networks can be re-planned or re-arranged so that
the resources of networks will be used to their maximum. The
application of GZF9183-V repeater shall attract more traffic load with its
short cycles, immediate returned profits, easy installation and savings of
network resources and expand the network coverage with low cost to
make up for the insufficient coverage of system base station. It is a good
solution to optimize network with Frequency Shifting Repeater in
networks.
In some areas with tough conditions, Frequency Shifting Repeater
of mobile communications is characterized by its strong adaptability,
quick construction and high sound quality. It can cover the entire
coverage area. GZF9183-V Frequency Shifting Repeater of mobile
communications can solve the problem remote areas, highways,
railways and airport. In the areas where the frequency of the base

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station is not used, the extra communication capacity can be transmitted
to other areas so that equipment shall be fully used.
1.2 Scope of Application of the Equipment
Applicable to airport, stations, mountain area, railway lines, holiday
village, tourist areas, large-scale industry and mining enterprises,
remote residential areas, countryside and dead zones and shadow
areas of mobile communication. Especially it is important for the area
where the wireless signal environment is very complex and putting the
optical fiber is very difficult.
1.3 Major Features of the Equipment
1. Use filter with high selectivity and low insertion-loss and
multi-grade filter technology to enhance the isolation between
uplink and downlink.
2. No interference to the base station and other radio equipments
with low noise for the system, proper linearity and high power.
3. Ensure normal working of the repeater under tough environment
with automatic level control (ALC) function.
4. Unique wireless digital transmission and remote monitoring
system with various ways of monitoring and convenience for
network maintenance.
5. Modularized design facilitates assembly and maintenance.
6. Equipped with perfect network management system and friendly
operation interface as well highly reliable operation and failure
treatment capability.
7. When monitoring center has not been established, technicians can

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monitor, set, modify the parameters of all the modules of GSM
repeaters and easily collect equipment warning information via
local PC. Once the repeater fails, OMC can immediately send
warning information to designated mobile stations or phones at
will.
8. When monitoring center has been established, technicians can
monitor and control repeaters by OMC software in monitoring
center for optimize parameters and upgrade software according to
the actual situation of network. It will facilitate the monitoring of the
working of Frequency Shifting Repeater of GSM mobile
communication. See Repeater OMC Operation Instructions of
WRI Hongxin Co., Ltd (attached separately) for detailed operation
information.
1.4 Basic Principle
GZF9183-V Frequency Shifting Repeater is one of WRI Hongxin series
repeaters.
The style of network grouping of GSM Frequency Shifting Repeater is
flexible and in variety according to the real situation. The basic ways are
as follows:
Using such a repeater, the local repeater will receive the coupled signal
by cable or RF signal by air from Base Station service antenna, and the
received signal will be sent into filter to clear out the useless signal.
Then the signal will be shifted to the other frequency and amplified to the
signal with the same frequency and high power, the power range is from

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1W to 30W based on the type of High Power Amplifier (HPA). Then the
link antenna will send the signal to the remote unit. The remote unit will
shift the signal back to the original frequency and amplify it. By the
service antenna of remote repeater, the amplified RF signal will be used
to covering the dead zones. Just as the figure 1.1 shown.
figure 1.1: The basic principle of Frequency Shifting Repeater
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2. Working Principle & Technical
Indices
2.1 Working Principle
The radio signal is introduced to repeater by its donor antenna from the
BTS. In the downlink, the TX signal from BTS is isolated from uplink in the
duplexer, and sent to DET. In the duplexer connected with donor antenna,
part of signal coupled in 50dB will be used by wireless modem. Then the
downlink signal will be sent to the LNA to be amplified, with which the
noise figure is still low. After that, the signal will be filtrated by IF filter which
has very high Q value. At last, it will be amplified again by the high power
amplifier(HPA). After such a progress, the power of the signal will reach
1W to 30W depending on the type of HPA. In the uplink, the progress of
amplifying signal is very similar to the downlink, just in different frequency.
From the input of donor antenna to the output of service antenna, the gain
of repeater system will usually be 90dB. The gain of LNA is about 55-60dB,
and the gain of HPA is about 50-55 dB. Total gain of repeater system can
be modified by setting the value of the digital attenuators(ATT) located in
the LNA and HPA. The dynamic range of ATT is more than 60dB.

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LN P
PLN
Transducer
Transducer
Donor Antenna
Link Antenna
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LN P
Link Antenna
PLN
Transducer
Transducer
Local unit Service Antenna
Remote unit
2.2 Product Features
1. Excellent RF indices: Based on her insight into GSM system, WRI
Hongxin has incorporated the GZF9183-V Repeater as a part of the
GSM mobile communications system in designing the system indices of
the product to make sure that the RF links are transparent and unblocked
for adequate absorption of traffic. And ensure the excellent performance
of the RF links though proper allocation of the indices of the RF parts and
the powerful optimization capability of the RF system. And also make the
integrated system have excellent GSM parameter features through
analysis, careful designing and strict control of such key parameters as
noise characteristics, uplink/downlink transmitting power, coverage
range, uplink and downlink balance, out-of-band suppression, and group
time delay. What’s more, a number of technologies have obtained
patents in China.
2. Module design: Module design is the development trend of system

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design and makes it easier for upgrading and maintenance. To meet
market demands, WRI Hongxin has developed a flexible and effective
series repeater module system through meticulous system certification,
unit analysis, rational division of modules and proper index analysis, thus
paving the way for the flexible arrangement of multiple types of
machines.
3. Interior monitor and control (M&C): The interior M&C module of the
GZF9183-V Repeater is the control core of the whole repeater and
implements four functions: detection, control, communication, and
alarming. The standby battery on the M&C board maintains the normal
running of the system in case of power-off and sends a power-off alarm
to the OMC center, and supports, monitors or resets wireless Modem;
the LED, indicator and MIC switch interface provide onsite maintenance
without tools; and the serial interface of the portable computer is
connected directly to the system to provide a more convenient local M&C
means.
4. Structure: The integrated system is made of aluminum alloy and its
surface is treated with advanced technique to ensure excellent EMC
performance and anti-corrosion performance; the integrated GZF9183-V
repeater is tightly sealed so that its anti-rainfall strength is up to 3mm/min
(GB4785-84) and its anti-splash strength is up to 3m/s (water speed);
water-tight rubber spacers (service life: 10 years) are used between the
bottom housing and the top cover, the leakage rate is 1.0Pa cm2/s
(GB2423.23 submersion method), the dust preventing capability is up to
10mg/m3particles (floating) and 3.0mg/m3 particles (falling)
(GB4795-84). To prevent local temperature rise of the housing resulting
from direct sunshine in summer, the repeater is designed with an
integrated sun shield and with the latest patent coating technique.
5. Reliability: Industrial-level components are used, which can
sustain a temperature range of -40°C ~ +85°C so that the product
can work reliably in a wide range of environments; the power
supply of the integrated system is designed with high redundancy
to make sure that the power module can work under normal load in
75°C and start normally in -35°C; the repeater is provided with
multi-level lightning protection devices to ensure reliable lightning

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protection for the power supply, antenna and feeder. The lightning
protection device of the power supply is a combination of a gas
discharge tube and a piezo-resistor and is designed with 2-level
protection, so that it can absorb very high lightning strike energy as
well as remove residual voltage satisfactorily. The MTBF of the
integrated system is not shorter than 60000 hours, the MTTR of the
integrated system is shorter than 30 minutes, and the maintenance
guarantee time is shorter than 24 hours. The service life of the
product is at least 10 years.

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2.3 Technical Indices
2.3.1 Major Technical Indexes
Standard value
Item Uplink Downlink
Work frequency band 890~915MHz 935~960MHz
Maximum output power (to be customized) 36 dBm 43 dBm
Duplex spacing 45MHz 45MHz
Channel spacing 200KHz 200KHz
Number of channels 4 4
Gain (max variation -25 to +55C) <5db <5db
Group time delay ≤6 μs ≤6 μs
Group delay variation within any ± 100KHz <200ns <200ns
Noise Figure ≤4 dB ≤4 dB
VSWR ≤1.5 ≤1.5
Gain adjustment range 45 dB ~ 105 dB 45 dB ~ 105 dB
Gain adjustment step 1dB 1dB
Table 2-3-1 Major technical indices of the GZF9183-V Repeater
2.3.2 Ambient Environment Condition
Ambient temperature: -25°C ~ +55°C
Storage temperature: -40°C ~ +85°C
Relative humidity: ≤95%
Air Pressure: 70106kPa
2.3.3 Power Supply Requirements
Power Supply: 220V AC/50Hz or 48V DC
Allowed fluctuation range of voltage: 180260VAC, 44~54VDC
Allowed variation range of frequency: 45Hz ~ 65Hz
Power Consumption: ≤300Watt

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2.3.4 Mechanical Characteristics
The GZF9183-V meets IP65 standard and can be fixed to the wall
or the installation pole with installation accessories.
The physical appearance of GZF9183-V Repeater is shown in Fig.
2-3-4.
GZF9183-V
Fig.2-3-4
2.3.5 Interfaces
Antenna interface: N-type connector
Portable computer and wireless modem interface: RS232
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3. System Composition
3.1 RF Unit
The RF unit, the main functional module of the GZF9183-V Repeater, serves to
bi-directionally receive and transfer the radio signals transmitted by the BTS and the
mobile phone. It consists of LNA and HPA in the uplink, so It does in the downlink.
3.1.1 Duplexer
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coupler
R
coupler
A
N
T
Duplexer connected with donor antenna
Duplexer connected with service antenna
Configuration
Link Duplexer in the GZF9183-V plays several roles in the repeater system. First,
duplexers connected with donor antenna and service antenna contain filters in the
downlink and uplink. The filters in uplink reject the downlink band just as the downlink
ones reject the uplink band. So the uplink and downlink are isolated into independent
channels. There are two duplexers for one GZF9183-V repeater, one is connected with
donor antenna, the other is connected with service antenna. For the duplexer connected
with donor antenna, two coupler ports will be provided, but the two ports have different
coupled values, are 50dB, the port for uplink power detection has a coupled value of 50dB,
the other port for wireless modem has a coupled value of 20dB. For the duplexer near the
service antenna, only one 50dB coupler port will be provided for downlink signal power
detection.
Donor Duplexer
ANT: Donor Antenna
RX: Uplink PA RF OUT
TX: Downlink LNA RF IN

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Wireless Modem Coupling: Wireless Modem
Coupling (RX-50dB): DET RF2
Service Duplexer
ANT: Antenna
RX: Uplink LNA RF IN
TX: PA RF OUT
Coupling (TX –50dB): DET RF1
1. Frequency RangeDownlink 890MHz~915MHz Uplink 935MHz~960MHz
2. Power Capacity≥100W
3. Out-band suppression@935MHz>70 dB @915MHz>70 dB
@925MHz>30 dB @980MHz>30 dB
@880MHz>30 dB
4. Group Time Delay150nsMax in-band
5. Ambient Temperature-4070
6. Connector TypeSMA Female
7. Ambient Humidity≤95Non-condensing
3.1.2 PA
Downlink PA
930MHz960MHz ALC Auto Level Control 40W Output Power Amplifier
Label “HXPA945-30-40m01a”, ”945” means downlink module,”40” means max output
power is 40 watt.
PA module in GZF9183-V is equipped in the downlink.
+27V DC power connects to the relevant outlet of power supply module.
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