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S21008
User Manual
25 pgs308.05 Kb0

Powerwave Technologies S21008 User Manual

INSTALLATION AND OPERATING
MANUAL
98/OSM/0019
ISSUE 1
13/04/99
DCS 1800 / PCS 1900 BOOSTER SYSTEM
INSTALLATION AND OPERATING MANUAL
Reference; 98/OSM/0019 Issue: 1 Date: 13/04/99
Prepared by:
Mark Billsberry
Airtech DCS1800 / PCS1900 Booster System Installation and Operating Manual Page 1 of 25
Authorised by Engineering: Authorised by Quality:
INSTALLATION AND OPERATING
MANUAL
HISTORY
MOD/ISSUE
DATE ISSUE AUTHOR
13/04/99 1 Mark Billsberry MI0167 Original Issue
NOTE NOTES
98/OSM/0019
ISSUE 1
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CONTENTS
1. INTRODUCTION 4
2. TECHNICAL DESCRIPTION OF BOOSTE R SYSTEM EQUIPMENT 5
3. INTERFACE DETAILS 7
4. INSTALLATION OF THE BOOSTER SYSTEM 19
5. COMMISSIONING 24
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Figure 1 Interface Drawing for the Booster..........................................................................7
Figure 2 Interface Drawing for the Booster..........................................................................8
Figure 3 Interface Drawing for the Booster External Bias Tee...........................................10
Figure 4 Interface Drawing for the Variable Gain G3 MHA..............................................11
Figure 5 Interface Drawing for the Indoor Variable Gain MHA Bias Tee.........................13
Figure 6 Interface Drawing for the Outdoor Variable Gain MHA Bias Tee ......................14
Figure 7 Interface Drawing for the PDU with Wall Mounted Bracket...............................17
Figure 8 Interface Drawing for the PDU with Pole Mounted Bracket................................18
Figure 9 Booster System Connectivity...............................................................................23
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1. Introduction
Airtech produce a range of masthead amplifier and associated equipment to provide enhancement of the performance of PCS, PCN, and GSM Base-stations (BTS ).
The limitation of the BTS has traditionally been its sensitivity to the Uplink, or received signal at the BTS. The antenna receives the signal from the mobile, but this can be degraded by the feeder cable losses from the antenna down the mast to the BTS. The Airtech Masthead Amplifier employs a low noise amplifier to transmit the improved signal strength down to the BTS overcoming the signal degradation due to the feeder cable losses.
The result is a greater sensitivity of the receive system, providing better quality, greater coverage and generally fewer dropped calls, as well as reducing the power required by the mobile phone from any particular location which may increase the battery life and general user satisfaction with the network.
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The Airtech Booster is designed to increase the downlink signal level by placing the high power amplifiers at the masthead reducing the feeder losses. This extends the range of the base station further, reducing infrastructure costs or improving coverage in black spots.
CAUTION: PRIOR TO WORKING ON OR INSTALLING THE BOOSTER SYSTEM OR ANY OF ITS COMPONENTS, ENSURE THAT THE BTS TRANSMITTER RF OUTPUT IS TURNED OFF AND THAT PRECAUTIONS ARE TAKEN TO ENSURE THAT THE TRANSMITTER CANNOT BE ACTIVATED DURING THE EQUIPMENT INSTALLATION. THERE ARE NO USER SERVICABLE COMPONENTS INSIDE THE BOOSTER. RETURN THE UNIT TO THE FACTORY IF SERVICE OR REPAIR IS REQUIRED.
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2. Technical Description of Booster System Equipment
The booster system consists of the following units:
• Booster
• Booster Bias Tee
• Variable Gain G3 Masthead Amplifier (Optional)
• Variable Gain Masthead Amplifier Compatible Bias Tee (Optional)
• Booster System Power Distribution Unit
• Connecting Cables
2.1 Booster
The Booster is designed for masthead operation. It includes a variable gain transmit high power amplifier and a variable high gain LNA. The gain settings are controlled by a micro­controller via a serial data link with the Power Distribution Unit.
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The Booster is designed to interface with duplexing feeds to both the antenna and the Base Station. The RF, DC power (+30V ) and serial data link are all fed to the booster through the RF coaxial feeder cable.
The Booster is housed in a weatherproofed enclosure rated to IP68, with a 7/16 RF connector for the ANT at the top and a 7/16 RF connector for the BTS at the base. There is also a grounding stud mounted on the base used for grounding the Booster to the mast, and provides the discharge path for the lightning protection circuit.
2.2 Booster Bias Tee
The Booster Bias Tee performs four functions within the booster system. A straight through path is provided for RF signals, the DC power from the PDU is injected onto the feeder and the serial communications to/from the booster is taken from the feeder and supplied to the PDU. The Bias Tee also provides lightning protection for the BTS and PDU.
2.3 Variable Gain G3 Masthead Amplifier
The Airtech Variable Gain G3 MHA M-series single feeder is designed to deliver up to 22dB Rx gain, low Tx loss and low Rx noise figure in a compact low volume and light weight IP68 enclosure. The MHA-M series single feeder is designed to interface with duplexing feeds to both the antenna and the Base Station.
The MHA is housed in a weatherproofed enclosure, with a 7/16 RF connector for the ANT at the top and a 7/16 RF connector for the BTS at the base. There is also a grounding stud mounted on the base used for grounding the MHA to the mast, and provides the discharge path for the lightning protection circuit of the MHA.
The Variable Gain G3 unit requires a +12V supply from the power distribution unit (PDU) at the base station. This is supplied to the G3 MHA via the RF coaxial feeder cable.
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2.4 Variable Gain G3 MHA Bias Tee
The Variable Gain G3 MHA Bias Tee performs the same functions as the Booster bias tee although it is not capable of handling the current requirements of the booster. The Variable Gain G3 MHA Bias Tee uses one connector for both the DC power and the serial communications. A standard G3 Bias Tee should not be used in conjunction with the Variable Gain G3 MHA since it will block the serial communication interface with the PDU.
2.5 Power Distribution Unit
The Power Distribution Unit (PDU) converts the input supply to the +30V DC for the Boosters and the +12V DC for the MHAs. The PDU also generates an internal +5V DC supply used to drive the control and status panel integrated into the PDU. The PDU can supply, control and display the status of three boosters and six Variable Gain G3 MHAs. The PDU reports the status of up to three Boosters and six Masthead Amplifiers and can also set the Tx and Rx gains for each sector independently. The Booster PDU is only designed to be used in conjunction with the Variable Gain G3 MHA.
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It is important to ensure that the base station supply is within the voltage limits required by the Booster PDU and that it is capable of providing the power. The power requirements can be calculated using the table below.
Supply Voltage Limits
AC Input Option 85 V DC Input Option -36V to -72V
Power Supply Requirements AC Option DC Option
Per Booster 300W 250W Per Masthead Amplifier 5W 5W
2.6 Cables
The following three cables are required in order to connect the booster system:
PDU to BTS -48V DC supply ( DC input PDU only ) PDU to Booster Bias Tee DC supply PDU to Booster Bias Tee ( Serial Data ) PDU to MHA Bias Tee
In addition to these supplied cables, a number of RF jumper cables will be required to connect the booster to the antenna and BTS to the Bias Tee.
to 264V
rms
- 47Hz to 63Hz
rms
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3. Interface Details
3.1 Booster
The Booster is provided with the following electrical interfaces:
7/16 DIN Female (BTS) on the base. This is the connection for the duplexed Tx/Rx signals to/from the BTS. As well as providing for RF transmission, this connector also provides for DC feed and the communication interface via the RF cable and Bias Tee assembly.
7/16 DIN Female (ANT) on the top. This is the connection for the Tx/Rx Antenna. This port should be as close as possible to the antenna with the shortest/lowest loss interconnecting cable practicable.
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M8 Ground Stud on the base. This provides the Primary Lightning protection ground to the Booster. The ground cable should be of the largest cross sectional area, shortest length practicable and be connected to a suitable grounding point on the mast structure.
Figure 1 Interface Drawing for the Booster
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Figure 2 Interface Drawing for the Booster
3.2 Booster Bias Tee
The Booster Bias Tee is provided with the following electrical interfaces.
7/16 DIN Female (Antenna Port). This is the connection for RF feeder up the mast to the Booster and Antenna. As well as providing for the RF receive and transmit signal, this connector also provides for DC feed and the communication interface via the centre pi n of the 7/16” connector. It is labelled ANT.
7/16 DIN Male (BTS Port). This is the connection for RF jumper from the Base-station Transceiver. It is labelled BTS.
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