RBS2202 TRU Installation 161101

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RBS 2202 TRU INSTALLATION GUIDE

RADIO ACCESS ENGINEERING

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Document InformationVersion: Draft Version 1

Document Owner:

Author : Alusio Vosailagi

Release Date:


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Table of Contents

1 PURPOSE.............................................................................................................................. 3

2 SCOPE ................................................................................................................................... 3

3 ADDITION OF TRUS.......................................................................................................... 3

3.1 INSTALLATION OF TRUS ...............................................................................................4

3.2 TRU CABLING FOR 2+2+2 - CDU_A ..........................................................................6

3.3 TRU CABLING FOR 2+2+2 - CDU_C+........................................................................ 7

3.4 TRU CABLING FOR 4+4+4 - CDU_C+........................................................................ 8

3.5 READING AND MODIFYING THE CELL IDB .................................................................10

4 REMOVAL OF TRUS........................................................................................................ 13

5 DEFINITIONS / GLOSSARY........................................................................................... 15

6 REFERENCES....................................................................................................................15

7 DOCUMENT CONTROL LOG........................................................................................ 15

8 DOCUMENT APPROVAL................................................................................................ 15


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1 Purpose

This document is to be used for the installation and de-installation of any CDU_A and CDU_C+RBS 2202 TRUs. Other relevant Ericsson RBS 2202 Installation manuals maybe used togetherwith this document should the need arise for other installation works not covered here.

2 Scope

This document is to be used within the RAE & NPG departments for the purpose of installingand de-installing RBS2202 TRUs.

3 Addition of TRUs

When installing additional TRUs to existing live sites in the network, ensure that a close liaisonis kept with the relative NPG group to facilitate a smooth work progress. Ensure that allnecessary tools and equipment are delivered to site safely. For the purpose of this document, itshall be assumed throughout this document that we are only dealing with RBS2202 CDU-Aand RBS2202 CDU-C+ and only these two types will be covered here.

The cell will not normally need to be halted to add or remove TRUs.

Fig 1 : RBS2202 Cabinet Overview


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In this document we will only concern ourselves with some of the more common configurationsfor the CDU_A and the CDU_C+ and which I have listed below here.

CDU_A , One cabinet with a maximum TRU config of 2+2+2

CDU_C+, One cabinet with a maximum TRU config of 2+2+2

CDU_C+, Two cabinets with a maximum TRU config of 4+4+4

Preconditions

All required CDUs are pre-installed on site

Existing PCM link to site is suffice to cater for the additional TRUs to be installed on site

3.1 Installation of TRUs

Call the FMT before entering the equipment room to notify them of your attendance andwhich will explain the site door alarm.

Sign site log book, indicating reason for visit.

Remove TRU blank plate from the position, the new TRU is to be installed and remove thespare TRU connection cables inside the TRU blank panel. There should be one TXconnection cable and two RX connection cables present.

Remove TRU unit from packing and give it a good visual check before inserting it into itsallocated slot.

Care needs to be exercised here to ensure that the back plane connections for the newTRU is made properly when inserting the new TRU unit into its place.

Do not at any stage force the TRU in if it is not fitting/sliding in smoothly as it may result inthe back plane connectors getting damaged.

You may adjust the TRU back plane connectors if it is not fitting into place properly wheninserting the TRU unit.

Once the TRU is properly slotted in, secure it with the fastening screws provided.

Follow the cabling provided in the following tables provided for their respectiveconfigurations.

Switch on the power for this newly installed TRU by switching on its relevant fuse unit at thetop of the cabinet where the IDM is located.


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Fig 2 Standard TRU, front panel and backplane

Fig 3 New TRU, front panel and backplane


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3.2 TRU Cabling for 2+2+2 - CDU_A

CABLE No. ORIGIN DESTINATION

RPM 513 705/00440 TRU 0 Tx out CDU 0 Tx in 1






RPM 513 699/00380 CDU 0 Rx A out 1 TRU 0 Rx A in


RPM 513 699/00490 CDU 0 Rx B out 1 TRU 0 Rx B in











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3.3 TRU Cabling for 2+2+2 - CDU_C+








RPM 513 699/00490 CDU 0 Rx out 3 TRU 0 Rx A in


RPM 513 699/00490 CDU 0 Rx out 1 TRU 0 Rx B in











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3.4 TRU Cabling for 4+4+4 - CDU_C+

MASTER CABINET TRU CABLING : 4+4+4 - CDU_C+





















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EXTENSION CABINET TRU CABLING : 4+4+4 - CDU_C+







RPM 513 705/00440 TRU 11Tx out CDU 5 Tx in 2














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3.5 Reading and Modifying the Cell IDB

Fig 4 DXU - Laptop Connection

Switch ON your laptop and connect it to the DXU card as shown in fig 4 above. Onceconnected, RUN your OMT software. Your start -up screen will be like as shown below.

Fig 5 OMT Initial start up screen

Follow the following steps in their order as listed here;

Click on Connection from the top menu bar and select the Connectoption. You shouldnow see pictorially on your screen that the OMT box is now connected to the RBS2000

box. (See fig below)


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Fig 6 OMT Connection screen

From the top menu bar, click on File then select Read IDB option. This will fetch you thecurrent IDB file for this particular site. Save a copy of this current IDB file in your hard drivebefore you may do any modifications to it.

Your IDB would should have been updated automatically by the system once you haveinstalled and powered up the new TRU.

Check that the new TRU is in the current IDB file in the RBS unit.

If and only if you do not see the new TRU unit in the IDB file resident in the RBS unit thenyou may do the following;

From the top menu bar, click on Connection then select Disconnect

Once disconnected, again from the top menu bar, click on Connection then select

Connect to reconnect to the RBS unit.

From the top menu bar, click on File then select Read IDB option to get the currentIDB resident in the RBS unit to see if this has now been updated automatically.

If the IDB still has not been updated to reflect the changes and show the new TRUinstalled then,

Click on the Modify IDB button as pointed out in fig. 6 above and the followingwindow will appear :

Modify IDB button


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Fig 7 Modify IDB Window

To make an RU (Replaceable Unit) "Active" highlight the RU in the Inactive windowandclick on the left arrow button. Alternatively, double-click on the RU. Click on the OK buttonwhen the active and inactive RUs are correct. The Modify IDB window will now close.

From the top menu bar, click on File then select the Install IDB option.

Once the IDB in the RBS unit reflects the changes done and showing that the new TRU is nowin place then,

Call the relevant MTX for this site and advise them that the new TRU is ready to be loadedand brought into service.

Once the new TRU is in service, check with MTX staff to ensure the new TRU is takingtraffic and all is well with the site before leaving site.

Close and exit OMT software then disconnect laptop connection to the DXU card.

Tidy up equipment hut and enter work carried out in site log book before leaving site.


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4 Removal of TRUs

Call relevant MTX to advise of work that needs to be carried out before leaving for the site.Ensure that you take appropriate empty packing for the TRU unit to be removed to avoidpotential equipment damage due to transportation.

Once at the site, call MTX to advise that you are ready to remove unit. Follow the steps belowin their order given here once you have received MTX staff approval to start removing unit.

Switch ON laptop, connect it to DXU unit and execute OMT software

Click on Connection from the top menu bar and select the Connectoption. You shouldnow be connected to the Base Station equipment.

From the top menu bar, click on File then select Read IDB option. This will fetch you thecurrent IDB file for this particular site. Save a copy of this current IDB file in your hard drivebefore you may do any modifications to it.

Switch off the power for the TRU unit to be removed and remove all cable connections toit.

Unscrew the unit and pull it out from its slot.

Click on the Modify IDB button and the following window will appear :

Fig 8 Modify IDB Window

To make an RU (Replaceable Unit) "Inactive" highlight the RU in the Active windowand click

on the right arrow button. Alternatively, double-click on the RU. Click on the OK button whenthe active and inactive RUs are correct. The Modify IDB window will now close.

From the top menu bar, click on File then select the Install IDB option. This will now installback into the RBS unit the new (modified) IDB. This is necessary as the system will notupdate its IDB automatically as is the case when installing new TRUs.

Close and exit OMT software then disconnect laptop connection to the DXU card.

Call relevant MTX and advise your work is complete and ensure all is well on site beforeleaving site.


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Pack the de-installed unit properly together with all associated cables and take to agreedlocation.

Tidy up site and enter work details in site log book.


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5 Definitions / Glossary

Term Definition

CDU Combining Distribution Unit - is the interface between transceivers (TRU) & the antenna system. It allows

several TRUs to share antennas.

DXU Distribution Switch Unit - is the central control unit of the RBS. DXU handles the Managed Object Central

Functions (CF).

ECU Energy Control Unit - controls and supervises the power equipment (PSU, BFU, battery, AC Connection

Unit) and climate equipment (fans etc).

IDB Internal DataBase

IDM Internal Distribution Module

MTX Mobile Telephone Exchange

OMT Operation & Maintenance Terminal

PSU Power Supply Unit - is available in two versions: PSU 230 and PSU -48.

RU Replaceable Unit.

TRU Transceiver Unit - is a transmitter/receiver and signal processing unit which transmits and receives the radio

frequency signals that are passed to and fro from the mobile station.

6 References

Associated document Location

Doc. No

Ericsson's RBS2102, RBS2102, RBS2103, RBS2202 Reference Manual RAE Department LZN 302 76 R7A

7 Document Control Log

Version Date Authors Summary of ChangesDraft 2nd November, 2001 Alusio Vosailagi N/A

8 Document Approval

Name and Position Signature Date


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RBS2202 TRU Installation 161101