Amplitec W20-GSM User manual

User Manual of
W20-GSM indoor single
bandselectiverepeaters
Amplitec Corporation

User Manual of W20-GSM Indoor single band selective repeaters
Confidential Page 1
CATALOGUE
CHAPTER 1. SAFETY WARNNING................................................................................2
CHAPTER 2. SUMMARY ................................................................................................3
CHAPTER 3. SPECS AND FEATURES..........................................................................4
3.1 F
EATURES ...............................................................................................................................4
3.2 S
YSTEM DIAGRAM ....................................................................................................................4
3.3 E
LECTRICAL S PECIFICATION .....................................................................................................4
3.4 M
ECHANICAL S PECIFICATION ....................................................................................................4
3.5 A
PPEARANCE D IAGRAM ...........................................................................................................6
3.6 P
ORTS .....................................................................................................................................6
CHAPTER 4. INSTALLATION.........................................................................................7
4.1
I NSTALLATION REQUIREMENTS .......................................................................................................7
4.2
I NSTALLATION ...............................................................................................................................7
4.3
C ONNECTION ................................................................................................................................9
4.4
S YSTEM INSPECTION ...................................................................................................................10
CHAPTER 5. REPEATER SETTING.............................................................................10
5.1
P OWER SUPPLY CONNECTION ......................................................................................................10
5.2
P ERFORMANCE S ETTING .............................................................................................................11
CHAPTER 6. ENGINEERING MAINTENANCE ............................................................13
6.1
O PERATION AND MAINTENANCE ...................................................................................................13
6.2
E MERGENCY DEALING .................................................................................................................13
6.3
M AINTAINING DIRECTIONS ............................................................................................................14

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Chapter 1. Safety Warnning
Users must follow the below principles：
1. Repeater should follow system requirement of communication equipment, assure
good groundings and lightning protection.
2. The power supply voltage of repeater should meet the standards of security
requirement; any repeater-operator can operate only after cutting power in advance.
Only the professional can operate electrified.
3. Do not dismantle machine, maintain or displace accessories by yourself, because in
this way, the equipment may be damaged or even get an electric shock.
4. Do not open the repeater, touch the module of repeater, even not to open the cover
of module to touch the electronic component, the components will be damaged due
to electrostatic
5. Please keep away from heating-equipment, because the repeater will dissipate heat
when working. And do not cover repeater with anything that influences
heat-dissipation.

User Manual of W20-GSM Indoor single band selective repeaters
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Chapter 2. Summary
In mobile communication, it is inevitable that macro-cell coverage cannot cover weak
or dead zones; to use repeater is a good choice in these areas. Single band selective
repeaters mainly applied in covering small blind and weak zones.
Indoor single band selective repeater W20-GSM is a good choice for VIP rooms,
offices, houses, restaurants, apartments, packing, etc.
Picture 2.1 Application
Indoor single band selective repeater W20-GSM enhances consumer satisfaction
greatly with its integrated design, compact size, easy engineering and rapid installation
and debugging,
Indoor single band selective repeater W20-GSM is made with the characteristics
of industrial aesthetic design, and thus can be installed in high-class places as a
decoration.
SAW filter technology enables it to amplify only the targeted operator’s signals and
reject all the others effectively, it is, therefore, an optimal solution for coverage
extension.

User Manual of W20-GSM Indoor single band selective repeaters
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Chapter 3. Specs and features
3.1 Features
zAdjustable range of 31dB at 1dB per step.
zAdvanced digital controlled frequency selection to ensure high out of band
rejection.
zHighly stable power design, to work normally even in very tough power
environments.
zALC technology to maintain stabile signal in coverage areas
3.2 System diagram
3.3 Specification
W20-GSM
Electrical Specification Uplink Downlink
Frequency Range 890.1 ~ 901.1 MHz 935.1 ~ 946.1 MHz

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Max.Gain ≧65dB ≧70dB
Band width 11MHz
Gain Adjust Range 31dB in step of 1dB
Automatic Level Control ≧20dB
Ripple in Band（P-P）≤3dB
Output Power ≧15dBm ≧20dBm
Max. Input Power Without Damage ≦0dBm
± 400 KHz ≦+50dB
± 600 KHz ≦+40dB
± 1 MHz ≦+35dB
Out of Band Gain
± 5 MHz ≦+25dB
9KHz~1GHz ≦-36dBm
Intermodulation
Products 1GHz~12.75GHz ≤-30dBm
9KHz~1GHz ≦-36dBm
Spurious Emission 1GHz~12.75GHz ≦-30dBm
Noise Figure ≦6dB
VSWR ≦2dB
Time Delay ≦5μs
MTBF ＞50000hours
Power Supply AC160~264V, 50/ 60Hz
Impedance 50 ohm
Mechanical Specification
I/O Port N-Female
Dimensions (D x W xH ) 268*225*58mm
Weight ≦3.5Kg
Installation Type Wall Installation
EnvironmentConditions IP40
Environmental Specifications
Humidity < 90%
Operating Temperature -10℃~55℃
LED Indication
Power LED DC ON/OFF
ALC 1~5dB,orange
Alarm LED ALC 20~25dB,red

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3.4 Appearance Diagram
3.5 Ports

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Chapter 4. Installation
4.1 Installation requirements
Indoor single band selective repeaters W20-GSM are mainly applied as indoor
coverage system, the changes of air moisture and temperature may influence its
reliability. So such factors as the temperature, air moisture, dustproof, current source
and space requirement, etc shall be fully considered during installation.
Position selection
¾Install in the place that is not easy to be reached by irrelevant people.
¾Install at the place that is convenient for power supply and cabling.
¾Avoid heat source and moist environment
¾Install at drought space, hang on wall vertically in order to assure good heat
distribution.
Power supply requirement
AC power supply of 160~264V, 50/ 60Hz
Installation tools and accessories
Serie
s item specification Quantity Remarks
1 Expanding plug M7 4 Accessories
2 Tapping screw M6*40 4 Accessories
3 Spinner
4 Waterproof tape
5 Ruler
1 measurement and installation of hole
6 Percussion drill 1 drilling on wall
4.2 Installation

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Picture 4.1 Installation diagram
Picture 4.2 Hole positions

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Installation Steps:
A) Use percussion drill to make four Φ6 holes on the wall according to
above hole diagram.
B) Fill the holes with expanding plug
C) Put the tapping screw through the holes and fit tightly with the
expanding plug, and fasten the repeater onto the wall.
D) Make sure that the installation is firm and correct
4.3 Connection
Connection of RF cable
Input Port : donor antenna cable is connected with BS Port;
Output Port : service antenna cable is connected with Output Port;
Grounding
Please connect one end of a copper wire with the intersection size of
16mm2 with the grounding screw, and the other end with the grounding system
of the building. It is requested that the grounding impedance shall be less than
10Ohm.
Power supply connection
Installation of air switch is recommended for the convenience of power
supply switch off.
Please use three-pin plug to assure good grounding
Please use the grounding screw, nut, washer to connect the grounding wire and
repeater shell
Lightening Arrestor can be installed if necessary

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Picture 4.3 Power supply connection
4.4 System inspection
The followings should be checked after installation:
zGrounding impedance<10Ω;
zAntenna socket, cable are well grounded;
zPower supply lightening protection
zBuilding lightening protection
zAntenna lightning Protection.
Chapter 5. Repeater setting
Please check whether the connection of RF cable is correct (donor antenna
connected to Input Port, service antenna connected to Output Port), and whether every
port is stable. After affirmation, please go along the followings:
5.1 Power supply connection
After power supply connection, check ALARM and POWER indicators first.
zStatus and definition of POWER indicators:
zStatus and definition of ALARM indicators:
Status Definition of ALARM
Status Definition
Green Normal
Off DC power problem

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Meaning: working in linearity
Green
attention: Input signals may be not enough
Meaning: overloading or self oscillation, strong input signals
Red
Attention: cut the connection of equipment and service antenna, then
connect the Output Port to load, if the red light changes to green or
orange, which means the isolation of donor antenna and service
antenna is not enough, then please adjust the isolation.
If the red light still turning on that means over accepting of donor
antenna or strong interference, then please adjust the place of donor
antenna..
Meaning: it is working in linearity
Orange Notice: Please adjust MGC to increase the attenuation value, till you
find the “edge point”, and let the repeater work at this point.
Off Repeater break down
5.2 Performance Setting
Curve chart of equipment working condition
POut
p
ut Powe
r
Pmax
(Pinput Power-VATT)
Green: Linear
amplification Red:
Overloading
Orange: stable
performance
Edge Point

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Picture 5.1 ：Curve of output power, input signal and attenuation
value
POutput Powe: output power
Pinput Power: input power
VATT: attenuation vale
Pinput Power -VATT: input power—attenuation value
Pmax: output power rating
Downlink gain setting
As for the downlink working performance, “orange” is a good working point. At this
time, downlink output power and coverage effect are stable.
But from another point of view, we hope the equipment is as far as possible away
from overloading status of “red” (thus the equipment would hold higher interference
depression ability). So we try our best to set the equipment near “edge point” when
engineering.
Setting of “edge point”: (Switch on the power supply after connection with donor
antenna and coverage antenna, and observe ALARM indicator.)
■If it shines “orange”, use 1dB as stepping to increase attenuator until “green”
turns on, then decrease 1~3dB attenuation value until “orange” turns on. The
setting of downlink gain can reach the perfect status.
■If it shines “green” then,
◆To check whether the attenuation value has been set, if it is, use 1dB as
stepping to decrease attenuation until the “orange” turns on, then the downlink gain
can reach the perfect status.
◆But if attenuation is not set, it indicates that the input power is not enough.
zThen please check coverage effect first, if the coverage effect is
good, the engineering has reached expecting target
zBut if the coverage effect is not so good, the donor antenna should
be adjusted until “orange” turns on or the effect reaches the target.

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Uplink gain setting
Uplink gain is set based on downlink gain..
Standards: uplink attenuation value=downlink attenuation value
Chapter 6. Engineering Maintenance
6.1 Operation and maintenance
zEquipment Disassembly
Close the outside air switch
Plug off the power supply
zCleaning
Close the outside air switch
Plug off the power supply.
Do not use liquid materials to clean the equipment to avoid short circuit;
Please use dry dishclout
zGrounding
Using grounded power plug (three-pin plug)
zPower supply
Please make sure the voltage and frequency comply with the repeater requirement.
Component replacement
Please do not maintain or replace components by yourself, otherwise may get an
electric shock. Only the authorized professional can maintain and replace the
components.
zWaterproof and moist proof
Please do not turn on or off the booster in moist environment when its door is
opened.
6.2 Emergency dealing
Switch off is recommended during following situations:
zThe power supply is not normal

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zLiquid flows into the equipment;
zWorking conditions is not normal, (overheating, abnormal smelling, abnormal
sundries)
zCloset damage
zPerformance decreasement
zNear to fire
zFlooding
6.3 Maintaining directions
Please check the booster step by step according to below processes, to find out the
problem with the repeater.
Abnormal performance
Green Red Off
LED check
Feeder system
inspection
Improve the feede
r
system
Isolation
inspection
Power supply
inspection Improve the power supply
system
Abnormal
Abnormal
Contact repeater
supplier
N
ormal
N
ormal
Strong interference near donor
antenna