Powerwave Technologies LGP011 NN User Manual

Product Manual

for

Tower Mounted Booster amplifiers

TMBs

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The information in this document is subject to change without notice and describes only the product defined in the Introduction of this documentation. This document is intended for the use by LGP Telecom customers only for the purposes of the agreement under which the document is submitted, and no part of it may be reproduced or transmitted in any form or means without the prior written permission of LGP Telecom. The document has been prepared to be used by professional and properly trained personnel, and the customer assumes full responsibility when using it. LGP Telecom welcomes customer comments as part of the process of continuous development and improvement of the documentation.

The information or statements given in this document concerning the suitability, capacity, or performance of the mentioned hardware or software products cannot be considered binding but shall be defined in the agreement made between LGP Telecom and the customer. However, LGP Telecom has made all reasonable efforts to ensure that the instructions contained in the document are adequate and free of material errors and omissions. LGP Telecom will, if necessary, explain issues which may not be covered by the document.

LGP Telecom liability for any errors in the document is limited to the documentary correction of errors. LGP Telecom WILL NOT BE RESPONSIBLE IN ANY EVENT FOR ERRORS IN THIS DOCUMENT OR FOR ANY DAMAGES, INCIDENTAL OR CONSEQUENTIAL (INCLUDING MONETARY LOSSES), that might arise from the use of this document or the information in it.

This document and the product it describes are considered protected by copyright according to the applicable laws.

LGP Telecom logo is a registered trademark of LGP Telecom AB. Other product names mentioned in this document may be trademarks of their

respective companies, and they are mentioned for identification purposes only.

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1 Document history...................................................................................6

2 About the Documentation.......................................................................7

2.1 Dear Customer.......................................................................................7

2.1.1 LGP home page.....................................................................................7

2.1.2 Contact LGP ..........................................................................................7

2.2 About the documentation.......................................................................8

2.2.1 Overview ..........................................................................................8

2.2.2 TMB models ..........................................................................................8

2.2.3 Disclaimer ..........................................................................................8

2.3 Abbreviations .........................................................................................9

3 Functional Description..........................................................................10

3.1 Schematic overview .............................................................................10

3.2 The TMB enclosure.............................................................................. 12

3.3 Control Interface Unit (CIU)..................................................................14

3.4 LED indicators......................................................................................16

3.5 Antennas ........................................................................................17

3.6 Feeder cables ......................................................................................17

3.7 Software diskette or CD.......................................................................17

3.8 CIU Cables ........................................................................................18

3.9 Alternative installation using only RF feeders (CIN option) ..................19

3.10 Alarms ........................................................................................19

3.10.1 Uplink failure..............................................................................20

3.10.2 Downlink failure.........................................................................20

3.10.3 Temperature high/low................................................................20

3.10.4 Input overload............................................................................21

3.10.5 Output overload.........................................................................21

3.10.6 VSWR over threshold...............................................................22

4 Installation ........................................................................................23

4.1 Unpacking the equipment.....................................................................24

4.2 Checking the equipment.......................................................................24

4.3 Attentions prior to installation...............................................................25

4.4 Equipment and tools for mounting........................................................ 27

4.4.1 Carrying / lifting handle........................................................................27

4.5 Hoisting the TMB.................................................................................. 27

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4.6 Mounting the TMB on a wall.................................................................28

4.7 Mounting the TMB on a vertical / horizontal pole.................................29

4.8 Mounting the CIU.................................................................................34

4.9 Connecting the TMB and CIU ..............................................................34

4.9.1 Connecting the earth cable..................................................................34

4.9.2 Connecting the RF feeder cables......................................................... 35

4.9.3 Configuring a power supply cable for 115V/230V AC versions............36

4.9.4 Connecting the power supply cable for 115V/230V AC versions .........37

4.9.5 Specifications for the AC input voltage.................................................38

4.9.6 The fuse (AC versions only).................................................................39

4.9.7 Configuring a power supply cable for 48V DC versions.......................41

4.9.8 Specifications for the DC input voltage ................................................43

4.9.9 Connecting the CIU/TMB communication cable...................................43

4.10 Connecting the TMB and CIU using the optional Current

Injectors (CIN)...................................................................................... 46

4.11 Connecting the CIU and BTS...............................................................48

4.11.1 Opening the CIU.......................... Error! Bookmark not defined.

4.11.2 Connecting to the terminal block . Error! Bookmark not defined.

4.11.3 Connecting the CIU/BTS alarm interface cable .........................49

4.11.4 Connecting the CIU RS232 cable..............................................49

4.11.5 Using the RS232 serial interface from a BTS............................50

4.12 Installation of the Remote Access equipment ......................................50

4.12.1 Supported modems ...................................................................51

4.12.2 Nokia 6210 ................................................................................51

4.12.3 Wavecom WMOD2....................................................................51

4.12.4 Remote PC with modem............................................................52

4.12.5 Additional installation information for Remote Access...............52

5 Commissioning.....................................................................................53

5.1 Prerequisites ........................................................................................53

5.2 The commissioning procedure.............................................................53

6 Configuration & Operation....................................................................54

6.1 Introduction ........................................................................................54

6.2 Installing TMB Manager .......................................................................54

6.2.1 Prerequisites ........................................................................................54

6.3 Connecting to the TMB ........................................................................54

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6.3.1 RS232 connection................................................................................55

6.3.2 About the wire-less infrared (IrDa) interface.........................................55

6.4 The TMB Manager (PC program).........................................................55

6.4.1 TMB Manager program versions..........................................................55

6.4.2 Computer system requirements ...........................................................55

6.4.3 Installing the TMB Manager on your PC ..............................................56

6.5 The TMB Manager menus....................................................................56

6.5.1 Communication port configuration........................................................57

6.5.2 Access TMB options using a code .......................................................59

6.5.3 Status menu ........................................................................................60

6.5.4 Information menu .................................................................................60

6.5.5 Gain setting menu................................................................................61

6.5.6 Alarm setting menu .............................................................................. 65

6.5.7 Alarm output configuration menu ......................................................... 66

6.5.8 Failure Configuration menu.................................................................. 67

6.5.9 CIU Software updating menu...............................................................68

6.6 Remote Access option to TMB Manager..............................................70

6.6.1 Modem installation ............................................................................... 70

6.6.2 Phone book (list of TMB’s)...................................................................71

6.6.3 Dial TMB ........................................................................................72

6.6.4 Troubleshooting Remote Access problems..........................................72

7 Maintenance ........................................................................................74

7.1 Maintaining the TMB ............................................................................74

7.2 Replacing the TMB...............................................................................74

8 Troubleshooting ...................................................................................75

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1 Document history

Revision Content Date/Author

MMP-10065A New document number July 2002 / Jesper Trier MMP-10065B Updated with TMB-1900 April 2003 / Jesper Trier

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2 About the Documentation

2.1 Dear Customer

Thank you for choosing a product from LGP Telecom. This product has been carefully developed with your satisfaction in mind. LGP Telecom believes in long relationships with its customers and the importance of good support.

2.1.1 LGP home page

LGP Telecom’s web site provides some public available TMB documentation as well as the latest news on new products and product options.

LGP Telecom’s home page: http://www.lgp.com

2.1.2 Contact LGP

For further documentation, product information, questions, suggestions or complaints, please contact your nearest LGP office or representative. You will find an up-to-date list of offices and representatives on our home page. You may also call the LGP Telecom head office and ask for Technical Support.

LGP Telecom: Telephone: +46 8 507 480 00 Telefax: +46 8 507 480 10

e-mail: mailbox@lgp.se or tech.support@lgp.se

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2.2 About the documentation

2.2.1 Overview

This set of documents describes the LGP Tower Mounted Boosters, release 1. The documentation has been divided into sections, most sections describing a specific user task.

The document format is Adobe’s PDF (Portable Document Format). The documents can be viewed and printed with any computer running Adobe Acrobat® Reader, version 2.1 or later. Acrobat® Reader is freeware from Adobe Systems Incorporated.

2.2.2 TMB models

The documentation for LGP TMBs is valid for the following TMB models: LGP 00901: P-GSM 900 (115/230 VAC)

LGP 00902: P-GSM 900 (48 VDC) LGP 00903: E-GSM 900 (115/230 VAC) LGP 00904: E-GSM 900 (48 VDC) LGP 01001: GSM 1800 (115/230 VAC) LGP 01002: GSM 1800 (48 VDC) LGP 01101: GSM 1900 EDGE (115/230 VAC) for external LNA LGP 01102: GSM 1900 EDGE (48 VDC) for external LNA LGP 01105: GSM 1900 EDGE (115/230 VAC) with internal LNA LGP 01106: GSM 1900 EDGE (48 VDC) with internal LNA LGP 01201: CIU for TMB900 LGP 01202: CIU for TMB1800 LGP 01203: CIU for TMB1900 LGP 16901: Current Injector Kit for TMB-900, 48V models. LGP 16902: Current Injector Kit for TMB-1800/1900, 48V models.

2.2.3 Disclaimer

The contents of these documents are subject to revision without notice due to continued progress in methodology, design, and manufacturing. LGP Telecom AB or its subsidiaries assume no legal responsibility for any error or damage resulting from the use of these documents.

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2.3 Abbreviations

ARP Antenna Reference Point BTS Base Transceiver Station BW Bandwidth CIN Current Injector CIU Control Interface Unit CSU Control Surveillance Unit CW Continuos Wave EDGE Enhanced Data for GSM Extension E-GSM Extended GSM GSM Global System for Mobile communications HPA High Power Amplifier IM Intermodulation LED Light Emitting Diode LNA Low Noise Amplifier MRT Mean Repair Time MS Mobile Station MTBF Mean Time Between Failure MTTR Mean Time To Restoration NF Noise Figure O&M Operation & Maintenance PBU Power Back-up Unit PSU Power Supply Unit TMA Tower Mounted Amplifier (Low Noise) TMB Tower Mounted Booster

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3 Functional Description

3.1 Schematic overview

Figure 1 shows a block-diagram of the LGP TMB system with an external Control Interface Unit. For module functionality descriptions, see the following sections. For technical data, refer to the “Specifications” part of this document (Chapter 8).

The TMB system includes:

• a 2-carrier integrated Tower Mounted Booster unit (TMB)

• one Control Interface Unit (CIU)

• one software package

and various optional installation kits.

TMB SYSTEM

ARP.1 ARP.2

DUPLEXFILTER

Tx1/Rx1

LNA

DUPLEXFILTER

Tx2/Rx2

LNA

Comm.

PSU

CSU

MODEM

POWER : 110 VAC,

230 V AC or

48 V DC

CIU

MODEM

CONTR-

OLLER

BTS

COMM.

INTERFACE

Figure 1a. Functional diagram of TMB with external CIU

The TMB contains one dual duplexer for each carrier; one duplexer at the antenna port and one duplexer at the BTS port. A high power amplifier (HPA) is in the Tx path (downlink), and a low noise amplifier (LNA) is in the Rx path (uplink).

The TMB contains a switch mode power supply unit (PSU). The power supply is available as either an AC or a DC version (115/230 VAC or +48 VDC).

The micro controller (CSU) handles all monitoring of the TMB as well as communication to the CIU. Communication to the CIU is achieved via the RF modem.

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The CIU is the main interface to the BTS. The CIU contains the physical alarm interface to the BTS, which is relay contacts (3 pole), as well as the infrared PC interface and the serial RS232 interface.

3.2 TMB-1900

The TMB-1900 is available in two configurations: With and without in-build LNA.

The TMB-1900 with in-build LNAs is intended for Tower Top mounting close to the antenna and is equivalent to TMB-900 and TMB-1800 as described in figure 1a.

The TMB-1900 without LNAs is intended for base mounting close to the base station and includes support (power supply and alarm interface) for four external TMAs to be mounted close to the antennas. The functional diagram is shown in figure 1b.

tower top tower base

to ANT

TMA-

CIN CIN

to ANT

TMA-

DUPLEXFILTER

Tx1/Rx1

DUPLEXFILTER

Tx2/Rx2

Comm.

PSU

CSU

MODEM

POWER : 110 VAC,

230 V AC or

48 V DC

CIU

MODEM

BTS

Figure 1b. TMB-1900 with external TMAs

COMM.

INTERFACE

CONTR-

OLLER

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3.3 The TMB enclosure

The TMB enclosure is made of aluminium. All screws are made of stainless steel. All metallic interconnections have seals which prevent dust and humidity from entering the unit.

Figure 2 shows the mechanical layout of the TMB.

Front cover

Figure 2 TMB mechanical layout

Rear heat sink

Side ventilation

Side heat sink

Front cover

The TMB front cover is attached to the large heat sink on the back of the unit as well as to the bottom plate. The cover is made of aluminium.

Note: Do not remove the front cover. Unauthorised opening of the TMB will destroy the seals and will void LGP Telecom’s product warranty.

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Rear heat sink

The large heat sink on the rear of the TMB forms the back of the TMB. In most installations the heat sink is protected from direct sun (solar radiation, heat) due to the mounting plate and structure on which the TMB is fitted. Although the TMB is designed to withstand direct sun, it is recommended to prevent/minimise direct exposure to solar radiation.

The air-gap between the main heat sink and the mounting plate serves as a “chimney”, to which airflow should not be restricted.

Note: Do not paint the heat sink. Note: Do not restrict free airflow to the rear heat sink.

Side heat sink

The smaller heat sink located on the right hand side of the TMB provides heat sink for the power supply.

Note: Restriction of free airflow to the heat sink must be avoided. Note: Do not paint the heat sink.

Side ventilation The left side of the TMB contains the ventilation system. The ventilation

design works in such a way that any moisture (condensation) inside the TMB will be vented out. The arrangement will accept direct rain (tropical rain). The unit is IP65 classified.

Note: Restriction of free air to this part must be avoided.

Handle

The handle is to be used when hand carrying the unit or lifting the unit up onto a tower. The handle can be left attached to the TMB after installation (recommended) or removed.

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Figure 3 TMB with handle/lifting wire

3.4 Control Interface Unit (CIU)

Figure 4. CIU outline view

The CIU is the remote control element of the TMB system. The CIU handles all communications with the BTS as well as a PC during setup.

Having the controller of the TMB system as a remote unit enables a flexible installation. The CIU interfaces with the TMB via a RF modem using a coaxial cable (TNC connector).

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The small size of the CIU will in some cases allow for installation inside the macro BTS. However, the CIU is shielded according to IP55 and does not require additional weather protection. Therefore an outdoor installation of the CIU next to a micro BTS is an example of an alternative highlighting the flexibility of installation.

The CIU is powered via the communication cable between the TMB and the CIU and does not need a separate power supply line.

The CIU contains three types of interfaces:

• RS232

• Alarm relay contacts

The alarm lines are relay contacts (closed or open). See “Operation” chapter for more detail.

The CIU is the “master” and the TMB the “slave” in the overall control architecture of the TMB system. Both the TMB and the CIU contains microprocessors with peripheral memory circuits. The control architecture is however very robust. In case the connection between the CIU and the TMB is lost (broken cable) the TMB will continue service without interruption using its current settings. However, no alarms or new settings can be handled until the TMB/CIU interface is re-established.

Software updates (user interface software) can be downloaded into the CIU via the RS232 interface. This software is stored in flash PROM. For downloading procedure please see “Operation”.

RS-232 interface can also be used to remotely access the TMB using a GSM-type modem or data-enabled handset. This is described in chapter 6.

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3.5 LED indicators

Green LED: normal operation

Flashing when

communicating with PC

Red LED:

alarm conditon

Figure 5 Zoom view of the LEDs on the CIU

There are no LED indicators on the TMB itself. The CIU has two LEDs.

• A red LED (steady light) is indicating “TMB has alarm condition” and service of the TMB system may be required, depending on the type of alarm.

• A green LED (steady light) indicates “power on” and normal operation. When flashing, it indicates that communication with the PC is in progress.

Note: The user can program the CIU in order to enable/disable all LEDs

making them non-visible; this, in example, if visible LEDs may provoke vandalism of the equipment.

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3.6 Antennas

The antennas are connected to the antenna ports (“ANT”) of the TMB via a standard RF jumper cable and aligned traditionally to give coverage in the intended area. Virtually any antennas can be used given the desired coverage pattern. Dual polarised antennas can be used with one TRX on each polarisation.

The only requirement is that the antenna isolation between the two TRX’s is better than 30 dB (ETSI requirement for cross-polar antennas) to comply with –120 dBm reverse intermodulation specification. Antenna isolation may on a real site installation be lower than stated by the manufacturer due to reflections. If the isolation of minimum 30 dB between antennas (or between the two polarisations inside a dual polarised antenna) is not fulfilled, a different frequency planning will solve the problem.

3.7 Feeder cables

The BTS feeder cables are connected to the TMB “BTS” port. Virtually any type of RF feeders can be used. The concept of using TMBs means that the high power is being generated at the antenna, which means that feeder loss is relatively uncritical. As the power supply to the TMB is using a separate cable, even thin lossy RF feeders can be used. Using thin RF feeders might result in more flexible and easier installations.

Using thin RF feeders has also a big cost impact on the site cost.

Note: Using thin RF feeders, which result in high loss, will however mean

that the output power will be very low if the by-pass mode is activated, as the total attenuation in this case is very high.

Note: Using thin RF feeder cables cannot be combined with the CIN

option.

Note: It is recommended to use jumper cables from the feeder lines to the

TMB to avoid stress in the connectors on the TMB.

3.8 Software diskette or CD

The TMB is controlled by a client software installed on a PC. The Windows based software is supplied with the unit. Installation of the software is described on the page that pops up on the screen when the CD is inserted, or in the “readme.txt” file on the diskette. It is also described in chapter “Configuration & Operation” of this manual.

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3.9 CIU Cables

Various cables are supplied as options with the TMB. You may want to configure your own cables, in this case consult “Installation”.

CIU – TMB comm. cable: The TMB is controlled by the CIU. A thin (RG58 or similar) coaxial cable is needed to connect the two units. The cable type is uncritical and maximum allowed cable attenuation between the CIU and the TMB is 20 dB @10 MHz and 10 ohm DC resistance. This means that the choice of communication cable type is relatively free and flexible allowing for high degree of freedom in terms of installation.

Note: The cable must be fitted with watertight TNC type male connectors

at both ends. Proposed is Huber & Suhner type 11TNC–50-3-6 or equivalent.

CIU – BTS alarm cable: The CIU-BTS alarm cable interfaces the TMB alarms to the BTS via the CIU. There is a total of 4 alarm relays on the CIU available for wiring up to the external alarm interface on the BTS. The relays have three terminals allowing for either “normal closed” or “normal open”. The wires are attached inside the CIU by simple screw terminals. The relays are operated as failsafe. This means that the relays are engaged during normal operation.

Note: Be sure to tighten the water tight cable gland arrangement for the

alarm cable.

CIU – RS232 cable: This cable provides the interface between the CIU and a BTS controller or a PC - using the on-board RS232 interface connection on the CIU.

Note: Place moisture cap on CIU’s RS232 connector when the RS232

cable is not attached.

See “Installation” concerning cable configuration.

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3.10 Alternative installation using only RF feeders (CIN option)

A Current Injector (CIN) option is available for the 48V DC version of the TMB. This eliminates the need for a separate power cable and the CIU-TMB cable. A CIN is mounted external to the TMB on the BTS2 port. A similar CIN is then mounted at the BTS on the feeder that connects to BTS2 of the TMB. The DC power to the TMB and the communication between the TMB and the CIU is now all done on one of the RF feeders.

In this case the CIU will be connected to the BTS CIN. The 48V supply will also be connected to the BTS CIN.

The details of the CIN installation is described in chapter 4.10.

3.11 Alarms

The following table shows the available alarms on the TMB (per carrier).

Uplink minor (one LNA) failure Uplink major (both LNA’s) failure Downlink minor (HPA) failure Downlink major (HPA) failure Temperature high/low Input power overload Output power overload VSWR above threshold (available at additional cost) TMB communication error TMA alarm (TMB-1900 only)

All alarms can be monitored on the O&M interface. A total of 4 relays (12 wires) are available from the CIU to the BTS. Software configuration determines which alarms are presented to the BTS. Normally closed (NC) or normally open (NO) for all relays can be configured independently.

The relay operation is ‘fail-safe’, meaning that the relays will engage during normal operation, and will disengage when there is an alarm condition. This also means that a power failure will generate an alarm condition.

The TMB system operates with “Auto Recovery”, meaning that it automatically will try to come back to normal operation / performance following an alarm situation.

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3.11.1 Uplink failure

Uplink failure alarm has two levels, minor and major. This alarm is indicating that the low-noise amplifiers are deviating from original setting/performances.

The uplink LNA amplifiers are balanced, i.e. two LNA devices working in parallel for each carrier.

A minor alarm will be activated if one of the LNA amplifiers of a balanced pair is failing. A major alarm is activated if both LNAs are out of operation.

It is configurable by software, what action shall be taken upon an uplink failure. You have the choice between:

For Uplink Minor alarm For Uplink Major alarm

Alarm only Alarm only

Increase gain in LNA By-pass mode

“Increase gain in LNA”: An action that can be set to compensate for a failing transistor. In this case the “surviving” transistor will “attempt” to bring back the uplink gain to the original value by increasing its gain and thereby compensate for the failing transistor. This can be used if the uplink gain is set lower than the maximum gain (12 dB).

“By-pass mode”: The by-pass relay will be activated upon a transistor failure, and the entire uplink LNA amplifier by-passed.

“Alarm only”: This setting will only report an uplink amplifier failure, but will take no further action.

3.11.2 Downlink failure

The downlink failure alarm has two levels, minor and major. This alarm indicates that the power amplifiers are deviating from original setting/performance.

A minor alarm will be generated if the TMB system automatically reduces the output power, either because of “output overload” (see below) or because of an internal decision by the system in order to prevent destruction of the TMB (see below as well). The TMB system will revert to normal setting when the fault condition disappears.

Downlink major failure alarm will be generated if there is a fatal error with the power amplifiers, i.e. transistor failure. Upon such a failure, the PIN diode switch will be activated automatically and will by-pass the power amplifier.

3.11.3 Temperature high/low

The temperature inside the TMB is monitored at three test points: on the two power amplifiers and on the power supply. The temperatures are shown on the Info or Status menu in the control software.

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The “Temperature Low” alarm is a minor alarm and may show up at cold start, when the TMB is started up from extreme cold temperatures like –40 ºC. In this extreme situation the TMB may run with reduced output power until the temperature inside the TMB has reached a level where it is safe to run the TMB with max output power (2 x 20 W).

This “Temperature Low” alarm will not be set, if the TMB is already running in normal traffic mode and the outside temperature falls to- 40 ºC. In this case the self heating of the TMB is sufficient to maintain full performance.

“Temperature High” alarm will be set, if the TMB gets overheated. The TMB is designed for an ambient temperature of up to +55 ºC and designed to be exposed to direct sunlight. However, in order to protect the TMB from destruction and ensure prolonged trouble-free operation (high MTBF), the system monitors extreme high temperatures.

At a “Temperature High” alarm a minor alarm will be sent and the TMB will automatically reduce the output power gradually and ensure that the internal temperature does not exceed +85 ºC.

When this “normal” temperature level is reached the TMB will revert to its original power setting. This reduction of output power is considered a ‘downlink minor alarm’.

3.11.4 Input overload

The TMB is designed to withstand +43 dBm input power (20 W). Exceeding +43 dBm may damage the TMB.

The “Input Overload” alarm will be raised when the input power level is reaching a critical high level. The input power level will together with the current gain setting determine how strong the internal circuitry (bypass, power amplifiers, etc.) is driven. In other words: is there a risk of product destruction, extreme intermodulation levels, etc.?

In this case the TMB will automatically reduce the gain to avoid overload and thereby prevent the TMB from saturation and destruction.

If the TMB downlink gain is already set at minimum (5 dB) the gain cannot be reduced further and the system is not able to compensate for this false operation of input overload.

The input overload alarm will always be preceded by the output overload alarm, as the output saturates before the input is damaged.

3.11.5 Output overload

The TMB is designed to run at maximum 20 watt output power (+43 dBm). Exceeding +43 dBm output power results in the power transistors entering their saturation level and the heat generation will increase dramatically.

If the TMB is operating with a certain gain value, which results in full output power (+43 dBm), and the input power is subsequently increased, then due to the fixed gain, the power amplifiers will be pushed into saturation.

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A saturated power amplifier will generate intermodulation and may cause interference. Overheating of the TMB will reduce the lifetime of the TMB (MTBF). Consequently the TMB system will send an “Output Overload” alarm and reduce the gain to a non-critical setting.

3.11.6 VSWR over threshold

The TMB can be provided with an antenna Voltage Standing Wave Ratio (VSWR) monitor built into the system (optional). The VSWR alarm is not an exact return loss measurement, but a simple broad band detection of the termination impedance at the Antenna port of the TMB.

The VSWR alarm sensor is capable of detecting a poor antenna VSWR, i.e. when the antenna is not present or the jumper cable is defective.

The VSWR function is only operational between 5W and 20W output power (37 - 43 dBm).

Nominal VSWR threshold is 4.5:1 (Return Loss equal to 4 dB). This will guarantee an actual threshold between 1 and 8 dB (all phases).

3.11.7 TMB communication error

3.11.8 TMB fail

Not implemented. Reserved for future use.

3.11.9 TMA failure

This alarm is only used for TMB-1900 with external TMAs. The current consumption of the TMAs is measured by the TMB and if outside

limits (<40 mA or >160 mA), an alarm is raised. The TMA power supply also has short circuit protection which turn off the DC

at a current higher than 300 mA.

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4 Installation

4.1 Safety precautions

The TMB is intended for professional use and must be installed by qualified personnel only.

Please pay close attention to the following safety precautions before handling, installing and operating the TMB:

• The TMB does not contain any serviceable parts inside. Do

not open the TMB.

• The TMB might have sharp edged on the heat sinks. Use

durable gloves when handling the TMB.

• When the TMB is in operation, the heat sinks are hot, up to 80°C. Do not touch heat sinks.

• The TMB does not radiate (microwave , X-ray, radioactive) by itself, but only when connected to antennas. Do not touch antennas connected to a TMB in operation.

• Keep clear of antennas connected to a TMB in operation (microwave radiation).

• The grounding wire must be installed before connecting the power supply. The grounding is protective.

• All cables must be connected before the TMB is turned on.

Please contact LGP Telecom if in any doubt about handling, installing or operating the TMB.

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Powerwave Technologies LGP011 NN User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual