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ZXG10-BTSBase Transceiver Station
Maintenance Manual(Routine Maintenance)
Version 2.9
ZTE CORPORATION ZTE Plaza, Keji Road South, Hi-Tech Industrial Park, Nanshan District, Shenzhen, P. R. China 518057 Tel: (86) 755 26771900 800-9830-9830 Fax: (86) 755 26772236 URL: http://support.zte.com.cn E-mail: [email protected]
LEGAL INFORMATION Copyright © 2006 ZTE CORPORATION. The contents of this document are protected by copyright laws and international treaties. Any reproduction or distribution of this document or any portion of this document, in any form by any means, without the prior written consent of ZTE CORPORATION is prohibited. Additionally, the contents of this document are protected by contractual confidentiality obligations. All company, brand and product names are trade or service marks, or registered trade or service marks, of ZTE CORPORATION or of their respective owners. This document is provided “as is”, and all express, implied, or statutory warranties, representations or conditions are disclaimed, including without limitation any implied warranty of merchantability, fitness for a particular purpose, title or non-infringement. ZTE CORPORATION and its licensors shall not be liable for damages resulting from the use of or reliance on the information contained herein. ZTE CORPORATION or its licensors may have current or pending intellectual property rights or applications covering the subject matter of this document. Except as expressly provided in any written license between ZTE CORPORATION and its licensee, the user of this document shall not acquire any license to the subject matter herein. The contents of this document and all policies of ZTE CORPORATION, including without limitation policies related to support or training are subject to change without notice.
Revision History
Date Revision No. Serial No. Reason for Revision
9/01/2005 R1.0 sjzl20052378 First edition
8/17/2006 R1.1 sjzl20052378 Change in documentation style
ZTE CORPORATION Values Your Comments & Suggestions! Your opinion is of great value and will help us improve the quality of our product documentation and offer better services to our customers.
Please fax to: (86) 755-26772236; or mail to Documentation R&D Department, ZTE CORPORATION, ZTE Plaza, A Wing, Keji Road South, Hi-Tech Industrial Park, Shenzhen, P. R. China 518057.
Thank you for your cooperation!
Document Name ZXG10-BTS (V2.9) Base Transceiver Station Maintenance Manual – Routine Maintenance
Product Version V2.9 Document Revision Number R1.1
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Contents
About this Manual........................................................... ix Purpose.............................................................................. ix Intended Audience ............................................................... ix Prerequisite Skill and Knowledge ............................................ ix What is in This Manual........................................................... x Related Documentation......................................................... xi Conventions........................................................................ xi How to Get in Touch............................................................ xii
Chapter 1.......................................................................1
Routine Maintenance Overview.......................................1 Procedure ...............................................错误!未定义书签。 Precautions ....................................................................3
Chapter 2.......................................................................5
Daily Maintenance Items.................................................5 BTS Current Alarms Querying and Handling ..............................5 24-Hour BTS History Alarms Querying and Handling...................5 24-Hour BTS History Notification Messages Querying and Handling..........................................................................................6 Real Time BTS Cells Status Querying and Handling ....................6 Daily Cells Performance Report Analysis ...................................7
Chapter 3.......................................................................9
Weekly Maintenance Items.............................................9 Past Week History Alarms Querying and Handling ......................9 Past Week History Notification Messages Querying and Handling 10 Alarm Frequency Analysis .................................................... 10
Weekly Cell Performance Report Analysis................................11
Chapter 4.....................................................................13
Monthly Maintenance Items..........................................13 Monthly Cell Performance Report Analysis ...............................13 Spare Parts Check ...............................................................13
Chapter 5.....................................................................15
Quarterly Maintenance Items........................................15 Conversation, Coverage, and Handover Test ...........................15
Equipment Room Maintenance ........................................ 15 Burglarproof Nets, Windows, Doors, and Other Items Check ......15 Equipment Room Temperature Check.....................................16 Equipment Room Humidity Check ..........................................16 Equipment Room Air Conditioner(s) Check ..............................16 Equipment Room Cleanliness Check .......................................16 Equipment Room Lighting Check ...........................................17 Equipment Room Sockets Check............................................17 Equipment Room Safety Check..............................................17 Environmental Alarm Collection Facilities Check .......................17
Principle Equipment Check ............................................. 18 Cabinets Power Supply Check ...............................................18 Fans Check.........................................................................18 Boards (CMM, TRM, and AEM) Running Status Check................18
Chapter 6.....................................................................21
Yearly Maintenance Items.............................................21 Principle Equipment Check ............................................. 21
Amplifiers Output Power Measurement ...................................21 VSWR Measurement ............................................................22 Clock Calibration (Optional for the BTSs with Internal Synchronization) .................................................................23 Cabinets Air Filters Cleaning .................................................25
Lightning Protection and Grounding Check ........................ 26 Lightning Arresters Check.....................................................26 Grounding Cables Check.......................................................27
Grounding Resistance Measurement ...................................... 27 Antenna Feeder System Check........................................ 28
Antenna Feeder Interfaces Check .......................................... 28 Antennas and Towers Firmness Check.................................... 28 Directional Antennas Tilt Check ............................................. 29 Waterproof Status of Antenna Feeder Connectors and Lightning Protection Grounding Clips Check .......................................... 31
Other Checks................................................................ 32 Iron Towers Check (Optional) ............................................... 32 Mast Check (Optional) ......................................................... 32 Transmission Equipment Running Status Check ....................... 33 Storage Batteries Running Status Check................................. 33
Chapter 7.....................................................................34
Routine Maintenance Data Record Forms.....................34 Daily Maintenance Record Form ...................................... 34 Weekly Maintenance Record Form ................................... 34 Quarterly Maintenance Record Form ................................ 34 Yearly Maintenance Record Form..................................... 34 Emergency Troubleshooting Record Form ......................... 34 Board Replacement Data Record Form ............................. 34
Appendix A..................................................................34
Normal and Abnormal Status of Boards........................34 Normal Status of Boards ................................................ 34
CMM ................................................................................. 34 TRM.................................................................................. 34 CDU.................................................................................. 34 RDU.................................................................................. 34
Abnormal Status of Boards ............................................. 34 CMM ................................................................................. 34 TRM.................................................................................. 34 CDU.................................................................................. 34 RDU.................................................................................. 34
Appendix B..................................................................34
Replacing Modules and Parts ........................................34 Precautions ........................................................................34 CMM Replacement ...............................................................34 TRM/ETRM Replacement.......................................................34 AEM Replacement................................................................34 PDM Replacement ...............................................................34 MCMM Backplane Replacement..............................................34 MTRM Backplane Replacement ..............................................34 Fan Module Replacement......................................................34 Trunk Cable Replacement .....................................................34 RF Cable Replacement .........................................................34 Cabinet-Top 1/2'' Soft Jumpers Replacement...........................34
Appendix C..................................................................34
PDM Front Panel Power Switches .................................34
Appendix D .................................................................34
RF Awareness and Control Information........................34 FCC Statement ............................................................. 34 CE Statement ............................................................... 34
Appendix E ..................................................................34
Abbreviations.................................................................34
Appendix F...................................................................34
Figures............................................................................34
Appendix G .................................................................34
Tables .............................................................................34
Appendix H.................................................................34
Index..............................................................................34
Confidential and Proprietary Information of ZTE CORPORATION ix
About this Manual
Purpose
This manual introduces the routine maintenance period, items and methods for ZXG10-BTS (V2.9).
Intended Audience
This document is intended for engineers and technicians who perform routine maintenance on the ZXG10-BTS (V2.9) Base Transceiver Station.
Prerequisite Skill and Knowledge
To use this document effectively, users should have a general understanding of GSM telecommunication technology. Familiarity with the following is helpful:
The ZXG10 system and its various components
User interfaces on the Base Transceiver Station
OMCR software
Local operating procedures
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
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What is in This Manual
This manual contains the following chapters:
T AB L E 1 – C H AP T E R S U M M AR Y
Chapter Summary
Chapter 1, Routine Maintenance Overview
Explains the purpose of routine maintenance and the precautions during maintenance.
Chapter 2, Daily Maintenance Items
Introduces the daily maintenance items and methods.
Chapter 3, Weekly Maintenance Items
Introduces the weekly maintenance items and methods.
Chapter 4, Monthly Maintenance Items
Introduces the monthly maintenance items and methods.
Chapter 5, Quarterly Maintenance Items
Introduces the quarterly maintenance items and methods.
Chapter 6, Yearly Maintenance Items
Introduces the yearly maintenance items and methods.
Chapter 7, Routine Maintenance Data Record Forms
Gives all the routine maintenance forms related to the maintenance methods introduced in this Manual.
Appendix A, Normal and Abnormal Status of Boards
Introduces the normal and abnormal status of the boards.
Appendix B, Replacing Modules and Parts
Explains the procedures of replacing Modules and Parts.
Appendix C, PDM Front Panel Power Switches
Explains the power switches on PDM front panel.
Appendix D, Abbreviations Lists all the abbreviations used in the manual.
Appendix E, Figures Lists all the figures appeared in the manual.
Appendix F, Tables Lists all the tables appeared in the manual.
Appendix G, Index Lists the important words appeared in the table.
Software Version
The steps and procedure mentioned in the document are according to OMCR version 2.0 (Build 95d – 2.95.100d), which is also referred as OMCR V2.95.
About this Manual
Confidential and Proprietary Information of ZTE CORPORATION xi
Related Documentation
The following documentation is related to this manual:
ZXG10-BTS (V2.9) Base Transceiver Station Guide to Documentation
ZXG10-BTS (V2.9) Base Transceiver Station – Technical Manual
ZXG10-BTS (V2.9) Base Transceiver Station – Hardware Manual
ZXG10-BTS (V2.9) Base Transceiver Station – Installation Manual
ZXG10-BTS (V2.9) Base Transceiver Station – System Debugging Manual
ZXG10-BTS (V2.9) Base Transceiver Station – Maintenance Manual (Emergency Maintenance)
ZXG10-BTS (V2.9) Base Transceiver Station – Maintenance Manual (Troubleshooting)
Conventions
ZTE documents employ the following typographical conventions.
T AB L E 2 – TY P O G R AP H I C AL C O N V E N T I O N S
Typeface Meaning
Italics References to other Manuals and documents.
“Quotes” Links on screens.
Bold Menus, menu options, function names, input fields, radio button names, check boxes, drop-down lists, dialog box names, window names.
CAPS Keys on the keyboard and buttons on screens and company name.
Constant width Text that you type, program code, files and directory names, and function names.
[ ] Optional parameters.
Mandatory parameters.
| Select one of the parameters that are delimited by it.
Note: Provides additional information about a certain topic.
Typographical Conventions
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
xii Confidential and Proprietary Information of ZTE CORPORATION
Typeface Meaning
Checkpoint: Indicates that a particular step needs to be checked before proceeding further.
Tip: Indicates a suggestion or hint to make things easier or more productive for the reader.
T AB L E 3 – M O U S E OP E R AT I O N C O N V E N T I O N S
Typeface Meaning
Click Refers to clicking the primary mouse button (usually the left mouse button) once.
Double-click Refers to quickly clicking the primary mouse button (usually the left mouse button) twice.
Right-click Refers to clicking the secondary mouse button (usually the right mouse button) once.
Drag Refers to pressing and holding a mouse button and moving the mouse.
How to Get in Touch
The following sections provide information on how to obtain support for the documentation and the software.
If you have problems, questions, comments, or suggestions regarding your product, contact us by e-mail at [email protected]. You can also call our customer support center at (86) 755 26771900 and (86) 800-9830-9830.
ZTE welcomes your comments and suggestions on the quality and usefulness of this document. For further questions, comments, or suggestions on the documentation, you can contact us by e-mail at [email protected]; or you can fax your comments and suggestions to (86) 755 26772236. You can also browse our website at http://support.zte.com.cn, which contains various interesting subjects like documentation, knowledge base, forum and service request.
Mouse Operation
Conventions
Customer Support
Documentation Support
Confidential and Proprietary Information of ZTE CORPORATION 1
C h a p t e r 1
Routine Maintenance Overview
Routine maintenance is to check the equipment status periodically to find and resolve the problems in time to prevent potential damages or faults. This chapter introduces the purpose, common procedure and precautions of routine maintenance of ZXG10-BTS (V2.9).
Common Methods
The common methods for finding and removing faults are as follows:
Check alarms using alarm management and operation log of BSS operation & maintenance subsystem in OMCR (V2).
Observe and analyze alarm messages
Observe and analyze the alarm messages reported by each Network Element (NE), such as, current alarms, history alarms and common notification messages. This method helps to locate and resolve the abnormal situation or potential faults in advance, while the network is running.
Observe operation log
Observe operation log through user management to trace modifications on system parameters. Locate the relevant terminal and operator and detect the fault caused by the personal operations in time.
LED status analysis
Locate and remove fault by observing LED status on the panel of each board in the rack. The maintenance staff should be well familiar with the status and meaning of all LEDs on each board.
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
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Performance analysis
Carry out performance management and signaling tracing through management interface of BSS operation and maintenance subsystem in OMCR (V2). The steps include the following:
Using performance management interfaces
Create different performance measurement tasks, generate different performance reports and understand different performance indices of BSS. By analyzing the information, detect the distribution of load in the network and adjust network parameters in time to improve the network performance.
Through the signaling tracing interface
Trace the signaling involved in the BSS (including the Gb interface signaling). This helps the relevant engineers to consult various signaling procedures during debugging and maintenance and discover the signaling problems.
Fault analysis with auxiliary instruments
Use auxiliary instruments such as the test MS, signaling analyzer and BER analyzer to analyze, locate and remove faults.
Plugging/unplugging
Unplug/plug the defective board and external interface connectors. This will resolve the fault caused by the poor contacts or processor.
Comparison and replacement
Compare the defective board with a normal board in the similar position. Check for the system in running state, jumpers or connection cables (for example, a board in the same slot in a multi-mode position in the system). This will help to verify the fault.
Replace the possible defective board with the spare or another faultless board.
Isolation
Isolate the part of the defective board from the other relevant boards or racks. This will help to find out if the fault is due to the interaction between them.
Self-test
Run the self-test after powering on. The LEDs on the panel flash in a certain pattern. Examine the board based on LED pattern.
To remove the fault, the above procedure works simultaneously with the experience of the maintenance staff.
Chapter 1 - Routine Maintenance Overview
Confidential and Proprietary Information of ZTE CORPORATION 3
Precautions
Following matters need attention during routine maintenance.
The equipment room should be clean. Ensure the normal temperature and humidity conditions. Take preventions against dust and dampness.
Ensure the stability and reliability of the primary power system. Check the system grounding and the lightning ground on periodic basis. In particular, check the lightning protection system before storm season and after thunderstorm to ensure that the facilities are in good condition.
Perform regular routine maintenance. Maintain a complete log to provide detailed records on system operation, version, data changes, upgrading and troubleshooting. Keep shift records to identify the responsibilities. This helps in the future analysis and troubleshooting.
The maintenance personnel should be well trained and have the certain knowledge about the equipment and networks before taking the post. Before handling the equipment, wear antistatic wrist strap to avoid accidents.
Running signaling tracing program is highly forbidden in the daytime, when traffic is high. Signaling tracing can only be performed under the conditions permitted by ZTE Customer Service Department and in low-traffic time periods.
Make sure that the spare-parts are not affected by the moisture or mould. Ensure the sufficient stock of commonly used spare-parts. Keep the spare-parts separate to the defective parts and label them for convenience.
The light intensity in the equipment room should be strong enough for maintenance. Ensure that there should be no dark corner that causes maintenance inconveniences.
Remove the fault without delay. Contact the local office of ZTE CORPORATION immediately for the unresolved faults.
Place the contact information of the local ZTE office at a visible place so that the maintenance staff can contact ZTE in time.
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
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Confidential and Proprietary Information of ZTE CORPORATION 5
C h a p t e r 2
Daily Maintenance Items
This chapter introduces the daily maintenance items of ZXG10-BTS (V2.9).
BTS Current Alarms Querying and Handling
ZXG10 Alarm Management interface in the OMCR client
1. Click Fault Management in the OMCR topological view and select Alarm management.
2. In the ZXG10 Alarm Management interface, select View > Physical View from the menu bar.
3. From the left pane, select GSM Equipment > Physical Site to view the current alarms of the BTS site in the right pane.
There is no abnormal alarm of the BTS in the alarm view.
Double-click the alarm to get the alarm details. Resolve the alarm according to the System method in Details window.
24-Hour BTS History Alarms Querying and Handling
ZXG10 Alarm Management interface in the OMCR client
1. Click Fault Management in the OMCR topological view and select Alarm management.
2. In the ZXG10 Alarm Management interface, select File > Alarm History Query from the menu bar to start Alarm Query Wizard.
i. Select the History Alarm as Alarm Type.
Tools
Test Procedure
Normal Result
Troubleshooting
Tools
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ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
6 Confidential and Proprietary Information of ZTE CORPORATION
ii. Set the past 24 hours as the start time/end time, and then select the BTS to be queried from the alarm source to query all history alarms.
No frequent abnormal alarm or alarms occur and the alarm history query displays normal results.
Analyze the abnormal alarms or frequent alarms in detail. Find the causes, and resolve the frequent or abnormal alarms as appropriate.
24-Hour BTS History Notification Messages Querying and Handling
ZXG10 Alarm Management interface in the OMCR client
1. Click Fault Management in the OMCR topological view and select Alarm management.
2. In the ZXG10 Alarm Management interface, select File > Alarm History Query from the menu bar to start Alarm Query Wizard.
i. Select the Information as Alarm Type.
ii. Set the past 24 hours as the start time/end time, and then select BSC and OMCR Information from the source to query all history notification messages.
No frequent exception notification message occurs and the notification message query displays normal results.
Analyze the frequent exception notification messages in detail. Find the causes, and resolve the notification messages.
Important! Focus on history notification messages related to BTS and Abis interface transmission during history notification messages analysis.
Real Time BTS Cells Status Querying and Handling
ZXG10 Dynamic data management interface in the OMCR client
1. Click Configuration Management in the OMCR topological view and select Dynamic data management.
2. In the left pane of ZXG10 Dynamic Data Management interface of the OMCR client, do the following:
i. To display the configurations and real-time status of the traffic and signaling channels of the current cell, right-
Normal Result
Troubleshooting
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Chapter 2 - Daily Maintenance Items
Confidential and Proprietary Information of ZTE CORPORATION 7
click the BTS Site Manager > Cell, and select QueryChanStastic.
ii. To display the real-time status of the channels of transceivers, click Cell > TRX. Right-click in the lower-right pane and click Refresh.
The status of the cell channel is normal and there is no blocked channel. Traffic channels are seized in real-time.
Refer to BTS alarms in the alarm management interface to resolve the blocked channels of the BTS. If there is no or abnormal channel seizure (for example, the channel is released once it is seized), use alarm management with signaling tracing to resolve.
Daily Cells Performance Report Analysis
ZXG10 Performance analyzer interface in the OMCR client
1. Click Performance Management in the OMCR topological view and select Performance analyser.
2. In the ZXG10 Performance Analyser interface, select Report > Create Performance Report from the menu bar to create a cell performance report.
The performance indices in the report are normal.
Resolve the abnormal indices in the performance report as appropriate.
Normal Result
Troubleshooting
Tools
Test Procedure
Normal Result
Troubleshooting
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
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Confidential and Proprietary Information of ZTE CORPORATION 9
C h a p t e r 3
Weekly Maintenance Items
This chapter introduces the weekly maintenance items of ZXG10-BTS (V2.9).
Past Week History Alarms Querying and Handling
ZXG10 Alarm management interface in the OMCR client
1. Click Fault management in the OMCR topological view and select Alarm management.
2. In the ZXG10 Alarm Management interface, select File > Alarm History Query from the menu bar to start Alarm Query Wizard.
i. Select the History Alarm as Alarm Type.
ii. Set the past week as the start time/end time, and then select BSC to be queried from the alarm source to query all history alarms.
The indices in the alarm query result are normal. There is no alarm that occurs often.
Analyze in detail the alarms that occur often. Find their causes and remove them.
Tools
Test Procedure
Normal Result
Troubleshooting
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Past Week History Notification Messages Querying and Handling
ZXG10 Alarm management interface in the OMCR client
1. Click Fault management in the OMCR topological view and select Alarm management.
2. In the ZXG10 Alarm Management interface, select File > Alarm History Query from the menu bar to start Alarm Query Wizard.
i. Select the Information as the Query Type.
ii. Set the past week as the start time/end time, and then select BSC to be queried from the alarm source to query all common notification messages.
No frequent exception notification message occurs and alarm query displays normal results.
Analyze in detail the exception notification messages that often occur, find their causes and remove them. Check the quality of the relevant transmission link for the notification messages that often occur at the Abis transmission interface, such as slip notification message and Rx alarms.
Alarm Frequency Analysis
Alarm management interface in the OMCR client
1. Click ZXG10 Fault management in the OMCR topological view and select Alarm management.
2. In the ZXG10 Alarm Management interface, select File > Alarm Statistics > Alarm Frequency Statistics from the menu bar to see Alarm Frequency Statistics window.
i. Select relevant BTS from the Source tab.
ii. Set the past week as the start time/end time from the Time tab. Click on the Custom radio option below and select 30 from the list item to be read as The Most 30 Kinds of Alarms.
Alarm frequency analysis results are normal.
Analyze in detail the alarms that often occur, find their causes and remove them.
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Chapter 3 - Weekly Maintenance Items
Confidential and Proprietary Information of ZTE CORPORATION 11
Weekly Cell Performance Report Analysis
ZXG10 Performance Analyser interface in the OMCR client
1. Click Performance Management in the OMCR topological view and select Performance analyser.
2. In the ZXG10 Performance Analyser interface, select Report > Create Performance Report from the menu bar to create a cell performance report.
The performance indices in the report are normal.
Resolve the abnormal indices in the performance report as appropriate.
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Test Procedure
Normal Result
Troubleshooting
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Confidential and Proprietary Information of ZTE CORPORATION 13
C h a p t e r 4
Monthly Maintenance Items
This chapter introduces the monthly maintenance items of ZXG10-BTS (V2.9).
Monthly Cell Performance Report Analysis ZXG10 Performance Analyser interface in the OMCR client
1. Click Performance Management in the OMCR topological view and select Performance analyser.
2. In the ZXG10 Performance Analyser interface, select Report > Create Performance Report from the menu bar to create a cell performance report.
The performance indices of the cells are stable.
Focus on the optimization on the cell with the poorest performance. Analyze the cells with significant index changes in detail, and locate the causes.
Spare Parts Check None.
Check the spare part warehouse and conditions against the spare parts list.
Note: Keep the damaged parts separate from the new and good-conditioned parts. Mark the items for convenience.
The spare parts are complete and in good condition.
Arrange supplementary common spare parts in time before these parts are used.
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Confidential and Proprietary Information of ZTE CORPORATION 15
C h a p t e r 5
Quarterly Maintenance Items
This chapter introduces the quarterly maintenance items of ZXG10-BTS (V2.9).
Conversation, Coverage, and Handover Test
Test MS and drive testing tools
Test the conversation, coverage and handover of the BTS with a test MS and drive testing tools.
The conversation quality is good. There is no call loss during the handover, and the BTS coverage is normal.
Resolve the problems found during the tests.
Equipment Room Maintenance Burglarproof Nets, Windows, Doors, and Other Items Check
None.
Check the burglar nets, windows, doors and other items.
The burglar nets, windows and doors are intact.
Repair the items in time if they are damaged.
Tools
Test Procedure
Normal Result
Troubleshooting
Tools
Test Procedure
Normal Result
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Equipment Room Temperature Check
None.
Observe the temperature in the equipment room from the thermometer.
Long-term operating temperature: 15 ºC to 30 ºC
Short-term operating temperature: 0 °C to 45 °C
Adjust the air conditioner(s) to maintain the normal temperature conditions.
Equipment Room Humidity Check
None.
Check the humidity in the equipment room from the hygroscope.
Long-term operating room-humidity: 40 % - 65 %
Short-term operating room-humidity: 20 % to 90 %
Adjust the air conditioner(s) to maintain the normal humidity conditions.
Equipment Room Air Conditioner(s) Check
None.
Check the operation of the air conditioner(s) in the equipment room and clean the air filters periodically.
Air conditioner(s) ensures the normal and effective cooling of the equipment room.
Repair the air conditioner(s) in time.
Equipment Room Cleanliness Check
None.
Check if the equipment room floor, cabinets, doors and windows, equipment documentation, and equipment interior and floor are clean.
All facilities remain clean and tidy without obvious dust.
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Chapter 5 - Quarterly Maintenance Items
Confidential and Proprietary Information of ZTE CORPORATION 17
Clean the dust. Find out the reasons of poor dust conditions and take the corresponding dustproof measures.
Equipment Room Lighting Check
None.
Check the general lighting and emergency lighting in the equipment room.
The lighting is normal and covers every corner.
Repair the damaged lighting facilities in time.
Equipment Room Sockets Check
None.
Check if the sockets in the equipment room are normal.
The sockets in the equipment room are normal.
Repair the sockets in time if the sockets are damaged.
Equipment Room Safety Check
None.
Check for the disaster protection facilities, equipment protection, and firefighting facilities in the equipment room.
The equipment room includes handheld fire extinguishers that have normal pressure and fall within the validity period. The equipment room is rodent-free and insect-free.
Repair or replace the damaged firefighting facilities in time.
Environmental Alarm Collection Facilities Check
None.
Check the environment alarm collection items such as temperature, humidity, fire alarm, power supply, and burglarproof facilities in the equipment room.
The environment alarm collection facilities in the equipment room are normal.
Repair or replace the damaged environment alarm collection facilities in time.
Troubleshooting
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Troubleshooting
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Principle Equipment Check Cabinets Power Supply Check
Mutilmeter
Check the DC input voltage at the cabinet top using multimeter. Check if any power cable is aged and need to be changed.
Nominal DC voltage: -48 V
Allowed fluctuation range: -57 V to -40 V
No DC power cable is aged.
In case of DC power abnormalities, check for the power alarm. If there is any power alarm, troubleshoot according to the meanings of the alarm LED and instructions of the power equipment. Replace the aged DC power cable if any.
Fans Check
None.
Check for the normal running of the fans, and the alarm on the OMCR client.
The fans work normal with even rotational speed. There is no alarm on the OMCR client.
In case of the fan alarms, replace the fan plug-in box or fans.
None.
Boards (CMM, TRM, and AEM) Running Status Check
None.
Check for the alarms by observing the LEDs on the Controller & Maintenance Module (CMM), Transceiver Module (TRM), and Antenna Equipment Module (AEM) panels and in the OMCR client.
Note: Refer to ZXG10-BTS (V2.9) Base Transceiver Station – Hardware Manual, for the meaning of LEDs.
The boards run normal and there is no alarm. See topic Normal Status of Boards in Appendix A for the normal working status of the boards.
Tools
Test Procedure
Normal Result
Troubleshooting
Tools
Test Procedure
Normal Result
Troubleshooting
Exit from Test
Tools
Test Procedure
Normal Result
Chapter 5 - Quarterly Maintenance Items
Confidential and Proprietary Information of ZTE CORPORATION 19
See Table 15 in Appendix A for the abnormal status of CMM. Troubleshoot the board as suggested below:
PWR troubleshooting
If the red PWR LED is on or off, check through the background (or Local Maintenance Terminal (LMT)) for LAPD link disconnection, power over-voltage or power under-voltage alarm.
RUN troubleshooting
If the red RUN LED is on or flashes, check through the background (or LMT) for LAPD link disconnection alarm.
SYN troubleshooting
If the red SYN LED flashes at 4 Hz, it indicates an E1 out-of-frame alarm.
If the red SYN LED is on, it indicates the E1 line broken or not connected, check through the background (or LMT) for LAPD link disconnection alarm.
CLK troubleshooting
When the red CLK LED is on, check through the background or LMT weather there is LAPD link interruption alarm or clock abnormality alarm.
STA troubleshooting
Red STA LED flashes at 1 Hz: It indicates LAPD link interruption.
Red STA LED flashes at 4 Hz: It indicates that the HDLC link is broken. Check through the background or LMT for the alarms of the following:
Long HW link disconnection
Active/standby communication link failure
Communication link failure from the extended rack to the basic rack
Communication link failure between the basic rack and the left and right extended racks
Red STA LED is on: Check through the background or LMT for the indications of the following:
Forward code slip at the transmit end of an E1 interface
Reverse code slip at the transmit end of an E1 interface
Forward code slip at the receive end of an E1 interface
Reverse code slip at the receive end of an E1 interface
CMM Board Troubleshooting
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
20 Confidential and Proprietary Information of ZTE CORPORATION
See Table 16 in Appendix A for the abnormal status of TRM. Troubleshoot the board as suggested below:
PWR troubleshooting If the PWR LED is off or PWR LED is red, check through the background or LMT for the alarms of the following:
LAPD link disconnection between Frame Unit Controller (FUC) and BSC
Communication interruption between CMM and FUC
RUN troubleshooting
If the red PWR LED is on, check through the background or LMT for the alarms of the following:
LAPD link disconnection between FUC and BSC
Communication interruption between the CMM and the FUC
MOD troubleshooting
If the red MOD LED is on, it indicates that the BCCH is blocked. Unblock the BCCH carrier through Dynamic Data Management. If unblocking of BCCH does not work, reset the TRM. If the alarm still exists, replace the TRM.
ACT troubleshooting
If the red ACT LED flashes, it indicates that channels (such as SDCCH and TCH) are blocked. Unblock the SDCCH or TCH through Dynamic Data Management. If unblocking of SDCCH and TCH does not work, reset the TRM. If the alarm still exists, replace the TRM.
If the red ACT LED is on, it is possible that TRM has fault. Reset the TRM. If resetting of TRM does not work, replace the TRM.
STA troubleshooting
If the red STA LED flashes at 1 Hz, it indicates that the LAPD link between FUC and BSC is broken.
If the red STA LED flashed at 4 Hz, it means the HDLC link of the TRM is broken. Check through the background or LMT for the alarm of communication interruption between CMM and FUC.
If red STA LED is on, check through the background or LMT for the alarms related to temperature, clock and frame number.
TRM Board Troubleshooting
Confidential and Proprietary Information of ZTE CORPORATION 21
C h a p t e r 6
Yearly Maintenance Items
This chapter introduces the yearly maintenance items of ZXG10-BTS (V2.9).
Principle Equipment Check Amplifiers Output Power Measurement
Following tools are required:
One 3 1/2 digital multimeter
One 150 W through-line power meter
Several RF cables
Other metals
1. Turn off the TRM power supply. See Appendix C, for the location of TRM power switch.
2. If Transceiver Unit (TRU) does not output power on turning off the power supply, do the following:
i. Loosen the cable connectors from the amplifier output end to AEM.
ii. Connect the cable connectors with a through-line power meter and a large-power load.
Caution: If the connector is not connected with any antenna, it must be connected with a 100 W microwave power load. If power load is connected with an antenna, then it does not need to be connected with any load.
3. Turn on the power and add the stimulation (there is output from the TRU).
Tools
Test Procedure
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
22 Confidential and Proprietary Information of ZTE CORPORATION
4. Read the power of the set frequency band (GSM900: 925 MHz – 960 MHz; GSM1800: 1805 MHz – 1880 MHz). In the case of full power, read the output power and the gain flatness.
The output power is more than 40 W and the gain flatness is less than ±0.5 dB.
1. For 80 W BTS, if the amplifier output power fails to meet the technical specifications, check if the TRU output level is within the allowed range. If it is normal, then check power amplifier for the fault.
2. Common problems of a power amplifier include the following:
Power amplifier module (front-end) damages
Amplifier tube (rear-end) damages
The above problems are caused by low gain and decreased output power. If the power amplifier causes the fault, replace the module.
1. Remove the connections between the through-line power meter, large power load, and the amplifier output end.
2. Restore the connection between the amplifier output end and the AEM.
VSWR Measurement
SiteMaster
50 Ω SMA (M) matching load
SMA torque spanner
One N(M), -N(M) testing cable
1. Turn on the power switch of SiteMaster.
2. Select OPT in the main menu.
3. Select the items to be measured (SWR, RL, CL) by pressing the B1 key.
4. Select the FREQ key in the main menu, and enter start and stop scanning frequencies.
5. Select the START CAL key to calibrate the measuring instrument as follows:
i. Connect the circuit breaker (OPEN) with TEST PORT and select ENTER.
ii. Connect the shorter (SHORT) with TEST PORT and select ENTER.
iii. Connect the 50 Ω load with TEST PORT and select ENTER.
The system performs auto calibration.
Normal Result
Troubleshooting
Exit from Test
Tools
Test Procedure
Chapter 6 - Yearly Maintenance Items
Confidential and Proprietary Information of ZTE CORPORATION 23
6. In SCALE of the main menu, enter the values of TOP, BOTTOM, and LIMIT. For convenient query, the recommended value of TOP is 1.5 and BOTTOM is 1.0.
7. In the FREQ menu, select MARKER and then select EDIT. Read the values. Examine if these values meet the requirements and then save them.
VSWR is less than 1.5.
If the test result is not normal, use the fault location function (DTF) to find the position of the fault and its cause. Remove the fault as appropriate.
Reconnect the connector of the equipment and restore the system.
Calibrate the measuring instrument before power-on for measurement
If measurement is conducted during equipment running, it is necessary to notify the customer or get the customer's approval. Lock the relevant sectors then switch off the relevant power and perform the test (measurement during equipment running is not recommended).
During measurement, observe the running status of the equipment with care.
Clock Calibration (Optional for the BTSs with Internal Synchronization)
Frequency meter
Notebook computer installed with LMT software
1. Set the BTS to the internal synchronization mode in OMCR.
In OMCR, select Configuration Management > Integrated Configuration Management > PhyView. Right-click Physical Site, select Site Attribute from the popup menu and set the synchronization mode after entering the Attribute interface.
2. Connect the frequency meter to the 13 MHz clock test port at the cabinet top. The 13 MHz clock-testing interface is located at the top of the Power Distribution Module (PDM) panel, as shown in Figure 1.
Normal Result
Troubleshooting
Exit from Test
Precautions
Tools
Test Procedure
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
24 Confidential and Proprietary Information of ZTE CORPORATION
F I G U R E 1 – LO C AT I O N O F 13M C L O C K TE S T I N G I N T E R F AC E I N T H E CAB I N E T
3. Connect the serial port on the notebook computer to the External Test Port (ETP) of the CMM.
4. Start LMT in the computer and click (the CLK Calibrate icon) in the menu to enter the CKU calibration interface.
5. Press Start to start communication with the BSC. When the program starts, only the Start button is available and all other buttons are unavailable. After the communication with BSC starts, the Start button becomes available and all other buttons such as Calibrate becomes unavailable.
6. The current CKU values shown in the CKU calibration interface include DAC value and voltage. Calibrate the DAC value in the calibration group box. Enter a DAC value manually or use the arrows to adjust the DAC value. The Step value determines the length of each increase or decrease in the DAC value. Three options are available: 1, 3 and 10. After specifying the DAC value, the system calculates the corresponding voltage automatically. Press the Calibrate button to notify the BSC to start calibration. Observe the frequency meter until the clock adjusts to 13 MHz.
7. Press Save to save the DAC value in the Flash memory, and the system adopts the value saved in Flash memory at the reboot. Save the new DAC value before rebooting the system otherwise the system uses the old DAC value saved earlier in Flash memory.
8. Press End to terminate the calibration.
The clock calibrates to 13.000000 MHz ± 0.025 ppm.
If the clock calibration is not possible to be in the above given range, then replace CMM.
Normal Result
Troubleshooting
Chapter 6 - Yearly Maintenance Items
Confidential and Proprietary Information of ZTE CORPORATION 25
Reset the BTS to its original mode if previously it works in the eternal synchronization mode.
Cabinets Air Filters Cleaning
The BTS (V2.9) cabinet has two air filters: One is installed in the air filter plug-in box at the bottom of the cabinet and the other is at the front door.
None.
1. Replace the air filter at the bottom of the cabinet in the following way:
i. Open the cabinet door, and loosen the two screws at both sides of the air filter plug-in box and hold the two handles to pull out the air filter plug-in box.
ii. Loosen the screws to take off the mechanical parts on the air filter, and then remove the air filter.
iii. Wash the air filter with clean water and air. Dry it or replace it with a new air filter.
iv. Install the air filter into the air filter plug-in box again. Make sure that the air filter is flat.
v. Push the air filter plug-in box along the guide rail into the cabinet, until the rear side of the panel presses closely against the front side of the guide rail. Fasten two screws and close the cabinet door.
vi. Connect the protection ground of the cabinet to the earth properly.
Caution: In dismounting the air filter plug-in box, protect the RF cables above it.
2. Replace the air filter on the cabinet door in the following way:
i. Open the cabinet door and take off the springs pressing the air filter. Take care of the hooks at both sides of the pressing springs and do not pull the springs by force.
ii. Take off the fastening screws on the upper and lower pressing strips to remove the upper and lower pressing strips and the air filter.
iii. Wash the air filter with clean water and air dry it or replace it with a new air filter.
iv. Install the dust screen into the cabinet door again and make sure that the dust screen is installed flatly. Close the cabinet door.
Exit from Test
Tools
Test Procedure
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
26 Confidential and Proprietary Information of ZTE CORPORATION
Lightning Protection and Grounding Check Lightning Arresters Check
SiteMaster
50 Ω N(F) matching load
One testing cable
Adapters N(M)-7/16DIN(M), N(M)-7/16DIN(F) The following steps describe how to check lightning arresters:
1. Switch off the power of all TRMs of the corresponding carrier shelf on the PDM front panel. See Appendix C for the Details.
2. Loosen the jumper connectors connected to both ends of the lightning arrester.
3. Calibrate the SiteMaster.
i. Press the START CAL button to perform zero calibration prior to the test.
ii. Connect the short calibration terminal (OPEN) to RF/REFLECTION on the backplane, and press ENTER.
iii. Connect the open-circuit calibration terminal (OPEN) to RF/OUT, and press ENTER to calibrate the load.
iv. Select SAVE SETUP to save the calibration value (optional).
4. Connect the SiteMaster to a port on the lightning arrester via testing cable.
5. Connect the other port on the lightning arrester to the matching load.
6. Read the SiteMaster and examine whether the return loss of the lightning arrester is within the valid range.
7. Repeat Steps (4) through (6) to measure the return loss of the other port on the lightning arrester.
8. Adjust the multimeter to X10K to measure the resistance of the conductor in the high-frequency sockets at both ends of the lightning arrester.
9. Adjust the multimeter to X1 to measure the resistance between the conductor in the antenna and the ground.
Tools
Test Procedure
Chapter 6 - Yearly Maintenance Items
Confidential and Proprietary Information of ZTE CORPORATION 27
The technical indices of the lightning arrester comply with the product specifications. The measured value is more than 20 dB.
The resistance of the conductor in the high-frequency sockets at both ends of the lightning arrester is more than 20 MΩ.
The resistance between the conductor in the antenna and the ground is approximately 0 Ω.
If the measured value is beyond the valid range, replace the lightning arresters.
Connect the jumper connectors to the two ports on the lightning arrester. Power-on the TRMs of the carrier shelf on the PDM panel to recover the system.
Take care of the grounding connection of the lightning arrester, so that they may not be damaged.
Grounding Cables Check
None.
Check if connectors of the grounding cables are loose, rusty or aged.
The connectors are not loose, rusty or aged.
Replace the grounding cables and reconnect them.
Grounding Resistance Measurement
Earth resistance tester (model ZC-8)
1. Disconnect the grounding down-lead from the equipment, and connect it to the earth resistance tester.
2. Mount two auxiliary piles 20 m and 40 m away from the testing point (remote voltage/remote current). To ensure good contact between the piles and the earth, sprinkle water around them.
3. Connect the two auxiliary piles and terminals of the earth resistance tester with a conducting wire. Shake the handle of the tester to measure the grounding resistance. For the battery power supply, you can read the grounding resistance directly by pressing the button.
Grounding resistance ≤ 5 Ω
Note: Measure the grounding resistance according to the design requirements, if any.
Normal Result
Troubleshooting
Exit from Test
Precautions
Tools
Test Procedure
Normal Result
Troubleshooting
Tools
Test Procedure
Normal Result
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
28 Confidential and Proprietary Information of ZTE CORPORATION
Check for the reliable connection of the grounding down-lead to the ground grid.
Check if the ground grid system complies with the design, and if any resistance-reducing agent is applied on regular basis.
Antenna Feeder System Check Antenna Feeder Interfaces Check
None.
Observe the LEDs on the AEM panel and check for SWR1 and SWR2 alarms.
Check if the RF cables of the antenna feeder system are aged.
The LEDs on the AEM panel show no SWR alarms.
The RF cables of the antenna feeder system are not aged.
According to the VSWR measuring method, check the VSWR of the jumpers, main feeders and antennas. Check segment by segment from the output port of the combiner to locate the defective parts. Replace the defective parts until the fault is removed.
If the RF cables are aged, replace them.
Antennas and Towers Firmness Check
Spanner
Check for the proper setting of fixing clips of antennas and antenna supports.
Check for the proper setting of fixing clips of the tower top amplifiers.
The fixing clips of antennas and tower top amplifiers are reliable and do not shake or slide.
Tighten the fastening screws with a spanner.
Troubleshooting
Tools
Test Procedure
Normal Result
Troubleshooting
Tools
Test Procedure
Normal Result
Troubleshooting
Chapter 6 - Yearly Maintenance Items
Confidential and Proprietary Information of ZTE CORPORATION 29
Directional Antennas Tilt Check
Angle gauge
Check the tilt of a directional antenna by using the rotary angle gauge with a bubble tube as shown in Figure 2. If using other instrument, refer to the corresponding instrument’s instructions.
F I G U R E 2 – AN G L E G AU G E
0
1020
30
40
5060
7080
90
80
7060
50
5060
7080
90
8070
60
50
40
3020
10
43210
576
8
87
65
43
21
01
23
45
67
887
65
43
21
215
12
1
152
12
1DIAL
1. Press the angle gauge against the object to be measured, as shown in Figure 3.
Tools
Test Procedure
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30 Confidential and Proprietary Information of ZTE CORPORATION
F I G U R E 3 – ME AS U R I N G T H E OB J E C T W I T H AN AN G L E G AU G E ( I )
1 2 3012
3
80
80
78
60
4
6
5
70
50
8
6050
70
567 234
12 156080
90
4
70
875 61
4050
30
10
20
2010
30
2
015
5
60
8090
70
101
432
8
4050
121
76 D
IAL
2
2. Rotate the dial until the bubble in the air bleeder is located in the middle of two indication rings.
3. Read the scale on the dial.
The tilt conforms to the network planning requirements.
1. Rotate the dial to set the angle.
2. Press the object to be measured against the dial chassis firmly. Move the object and chassis together until the bubble in the air bleeder moves to the middle of the two indication rings, as shown in Figure 4.
Normal Result
Troubleshooting
Chapter 6 - Yearly Maintenance Items
Confidential and Proprietary Information of ZTE CORPORATION 31
F I G U R E 4 – OB J E C T M E AS U R E M E N T W I T H T H E AN G L E G AU G E ( I I )
3
60
7
50
8
6
54
1250
1
278 356 4
507060 80
34
0121
60
7080
90
8
6
5
7 DIAL
0
3070
1030
4020
20
10
72
2
8090
011
7080 60
43 65
12 15
4050
81
2
215
Waterproof Status of Antenna Feeder Connectors and Lightning Protection Grounding Clips Check
Waterproof adhesive
Sealant
Insulation tape
Check for the water leakage and cracks on the antenna feeder connectors and the lightening protection grounding kit.
No leakages or cracks found.
Follow the steps below to make waterproof treatment:
1. Switch off the power of all TRMs/ETRMs of the corresponding carrier shelf on the PDM panel.
2. Remove the existing waterproof material.
Tools
Test Procedure
Normal Test
Troubleshooting
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
32 Confidential and Proprietary Information of ZTE CORPORATION
3. Wrap the waterproof adhesive at the connector, apply the seal adhesive, and then wrap the insulation tape.
4. Wrap the adhesive tape layer by layer from the bottom to avoid rainwater leakage.
5. Power-on the TRMs of the corresponding carrier shelf on the PDM panel.
Other Checks Iron Towers Check (Optional)
None.
Check the tower lamps.
Check the tower structure and the base by measuring the verticality and height of the iron tower.
Check the stronghold of structure bolts.
Check the corrosion-proof and rust-proof conditions.
The structure distortion, base sinking and verticality of the iron tower all satisfy the design requirements. The bolts are fixed tightly and there is no corrosion or rust on them.
Handle the abnormalities as per procedure.
Mast Check (Optional)
None.
Check the following:
Installation of the mast fasteners
Stresses of the mast
Cables on the cabling wire tower and anchors
Corrosion-proof and rust-proof conditions
Mast verticality
The mast is firmly fixed and there is no corrosion or rust. The mast is vertical.
Resolve the exceptions as per procedure.
Tools
Test Procedure
Normal Result
Troubleshooting
Tools
Test Procedure
Normal Result
Troubleshooting
Chapter 6 - Yearly Maintenance Items
Confidential and Proprietary Information of ZTE CORPORATION 33
Transmission Equipment Running Status Check
None.
Observe whether LEDs on the transmission equipment indicate any alarm.
No alarm is present.
Refer to User’s Manual of the transmission equipment.
Storage Batteries Running Status Check
None.
Check for battery leakage and reliable contact of the connection lines.
There is no battery leakage and the connection is normal.
Refer to the battery instructions.
Tools
Test Procedure
Normal Result
Troubleshooting
Tools
Test Procedure
Normal Result
Troubleshooting
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
34 Confidential and Proprietary Information of ZTE CORPORATION
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C h a p t e r 7
Routine Maintenance Data Record Forms
This chapter introduces various data record forms involved in routine maintenance.
Daily Maintenance Record Form T AB L E 4 – D AI L Y M AI N T E N A N C E R E C O R D FO R M
Daily Maintenance Record Form
On-duty Date:
On-duty Time:
Person Handing Over the Shift:
Relief Person:
Current Alarm Records of the BTS
Site No. Alarm Description
Time of Occurrence
End Time Remarks
History Alarm Records of the BTS
Site No. Alarm Description and Troubleshooting Remarks
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
36 Confidential and Proprietary Information of ZTE CORPORATION
Daily Maintenance Record Form
History Notification Message Records of the BTS
Site No. Notification Message Description and Troubleshooting
Remarks
Real time Status Abnormality Records of Cells
Site No. Abnormalities and Troubleshooting Remarks
Customer Complaints
Site No. Complaint Description and Troubleshooting
Remarks
Shift Description:
Shift Leader:
Verification:
Chapter 7 - Routine Maintenance Data Record Forms
Confidential and Proprietary Information of ZTE CORPORATION 37
Weekly Maintenance Record Form T AB L E 5 – W E E K L Y M AI N T E N AN C E R E C O R D FO R M
Weekly Maintenance Record Form
Maintenance Time: Maintenance Staff:
Check Item Analysis and Conclusion
Exception Handling Remarks
History alarms
History notification messages
Alarm frequency
Performance data
Shift Leader:
Verification:
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
38 Confidential and Proprietary Information of ZTE CORPORATION
Quarterly Maintenance Record Form T AB L E 6 – QU AR T E R L Y M AI N T E N AN C E R E C O R D FO R M
Quarterly Maintenance Record Form
Maintenance Time: Maintenance Staff:
Category Check Item Check Result Remarks
The coverage test result is normal
Yes No
The conversation test result is normal
Yes No
Conversation, coverage and handover tests
The handover test result is normal
Yes No
The burglar nets, doors and windows are intact
Yes No
Equipment room temperature
Temperature:
Equipment room humidity
Humidity:
The air conditioners in the equipment room are running normally
Yes No
The equipment room is clean
Yes No
The equipment room lighting is normal
Yes No
The sockets in the equipment room are normal
Yes No
The safety facilities in the equipment room are complete
Yes No
Equipment room maintenance
The environment alarm collection devices are normal
Yes No
The power supply of cabinets is normal
Yes No
The fans run normally Yes No
Checking the principal equipment
The boards run normally
Yes No
Shift Leader:
Verification:
Chapter 7 - Routine Maintenance Data Record Forms
Confidential and Proprietary Information of ZTE CORPORATION 39
Yearly Maintenance Record Form T AB L E 7 – Y E AR L Y M AI N T E N AN C E R E C O R D FO R M
Yearly Maintenance Record Form
Maintenance Time:
Maintenance Staff:
Category Check Item Check Result Remarks
Measuring the output power of amplifiers
Output power:
Measuring the VSWR VSWR:
The clock calibration is completed
Yes No
Checking the principal equipment
The air filters of each cabinet are clean
Yes No
The lightning arresters are normal
Yes No
The grounding cables are reliably connected
Yes No
Checking the grounding and lightning protection status
Measuring the grounding resistance
Grounding resistance:
The antenna feeder interfaces are normal
Yes No
The TTAs are fixed firmly
Yes No
The tilt of the directional antennas satisfies the requirements
Yes No
Checking the antenna feeder system
The antenna feeder interfaces and the lightning protection grounding clips are normal
Yes No
The iron towers are normal
Yes No
The masts are normal Yes No
The transmission equipment runs normally
Yes No
Checking others
The storage batteries are normal
Yes No
Shift Leader:
Verification:
ZXG10-BTS Base Transceiver Station Maintenance Manual (Routine Maintenance)
40 Confidential and Proprietary Information of ZTE CORPORATION
Emergency Troubleshooting Record Form T AB L E 8 – EM E R G E N C Y TR O U B L E S H O O T I N G R E C O R D FO R M
Emergency Troubleshooting Record Form
Site Name: Handled by:
Time of Occurrence: Solved Time:
Fault Source: Subscriber complaints Alarm system
___ Detected in daily maintenance Others
Fault Type:
Fault Symptom:
Troubleshooting:
Result:
Leader’s comments:
Chapter 7 - Routine Maintenance Data Record Forms
Confidential and Proprietary Information of ZTE CORPORATION 41
Board Replacement Data Record Form T AB L E 9 – B O AR D R E P L AC E M E N T D AT A R E C O R D FO R M
Board Replacement Data Record Form
BTS No.: Maintenance Staff:
Board Type
Board Slot
Time of Fault
Replace-ment Time
SN of the Faulty Board
SN of the Replacing Board
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A p p e n d i x A
Normal and Abnormal Status of Boards
Normal Status of Boards
Table 10 lists the normal status of LEDs on CMM panel.
T AB L E 10 – NO R M AL S T AT U S O F T H E LEDS O N CMM P AN E L
Name Description Color Normal Status
RUN Running LED Green Green LED is on
SYN System synchronization LED
Green/red Green LED flashes at 4 Hz: Boot is running
Green LED flashes at 1 Hz: Application is running
CLK Clock LED Green/red Green LED is on: Network synchronization clock at the Abis interface
Green LED flashes at 1 Hz: SDH network synchronization clock
Off: Free running
MST Active/standby status LED
Green Green LED is on: Network synchronizing
Green LED flashes at 1 Hz: Phase is locked
Off: Free running
STA Status LED Green/red Off: Normal
CMM
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44 Confidential and Proprietary Information of ZTE CORPORATION
Name Description Color Normal Status
Green LED flashes at 1 Hz: System is being initialized
Green LED flashes at 4 Hz: Software loading in progress
Table 11 lists the normal status of the LEDs on TRM panel.
T AB L E 11 – NO R M AL S T AT U S O F T H E LEDS O N TRM P AN E L
Name Description Color Normal Status
PWR Power LED Green/red Green LED is on: Normal
RUN Running LED Green Green LED flashes at 4 Hz: Boot is running
Green LED flashes at 1 Hz: Application is running
MOD Channel mode LED
Green/red Green LED is on: BCCH indication. See the Note below the table.
Green LED flashes at 1 Hz: BCCH indication; System Info broadcast
Off: No BCCH indication
ACT Channel activation LED
Green Green LED flashes: Channel activation indication (SDCCH, TCH)
Off: No traffic in all the channels and the channels are deactivated.
See the Note below the table.
STA Status LED Green/red Off: Normal
Green LED flashes at 1 Hz: System is being initialized
Green LED flashes at 4 Hz: Software loading in progress
TRM
Appendix A - Normal and Abnormal Status of Boards
Confidential and Proprietary Information of ZTE CORPORATION 45
Note:
The green MOD LED represents a temporary status. It is abnormal if the green LED is on and does not flash, indicating that the TRM has not received any System Info message.
The channel activation LED (ACT) shows the number of activated channels. According to the number of channels activated, the TRM adjust the LED control pulse width to display the number of channels activated. For the details, refer to Table 12.
T AB L E 12 – D I S P L AY O F T H E C H AN N E L AC T I V AT I O N LED ( ACT)
Number of Activated Timeslots LED Display
0 00000000,00000000
1 10000000,00000000
2 10100000,00000000
3 10101000,00000000
4 10101010,00000000
5 10101010,10000000
6 10101010,10100000
7 10101010,10101000
8 10101010,10101010
Note:
0 indicates off and 1 indicates on.
Each bit display time is Td and temporarily defined as 4 Hz (0.25 s) while the entire status display period is 16 * Td = 4 s.
For combined channels such as TCH/F, SDCCH/8, and SDCCH/4, Td can be regarded as activated, as long as one logical sub-channel (such as an SDCCH sub-channel) in this channel combination is activated.
When some timeslots are allocated as common control channels and private control channels (such as mainBCCH channel combination and extBCCH channel combination), the status of these timeslots is defined as inactivated and not included in the display statistics of ACT.
If extBCCH channel combination is used, the green LED flashes only when all configured BCCH channels are normal and system messages are being sent. If one or several extBCCH channels are blocked or defective, the red LED will flash according to the number of channels blocked or
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46 Confidential and Proprietary Information of ZTE CORPORATION
defective. The flashing time is the same as described above. If all the allocated extBCCHs are blocked or defective, the red LED will be solid on.
Table 13 lists the normal status of the LEDs on Combiner Distribution Unit (CDU) panel.
T AB L E 13 – NO R M AL S T AT U S O F T H E LEDS O N CDU P AN E L
Name Description Color Normal Status
FPO Forward power output Green On: Normal
SWR1 VSWR level-1 alarm Red Off: No alarm
SWR2 VSWR level-2 alarm Red Off: No alarm
PWR LNA power supply Green On: Normal
LNA LNA alarm Red Off: No alarm
Table 14 lists the normal status of the LEDs on Radio Distribution Unit (RDU) panel.
T AB L E 14 – NO R M AL S T AT U S O F T H E LEDS O N RDU P AN E L
Name Description Color Normal Status
PWR LNA power supply Green On: Normal
LNA LNA alarm Red Off: No alarm
Abnormal Status of Boards
Table 15 lists the abnormal status of the LEDs on CMM panel.
T AB L E 15 – AB N O R M AL S T A T U S O F T H E LED S O N CMM P AN E L
Name Description Color Abnormal Status
PWR Power LED Green/Red Red LED is on: Alarm
Off: Power off or other reasons
RUN Running LED Green Red LED is on or flashes: The system is abnormal
SYN System synchronization mode LED
Green/Red Red LED flashes at 4 Hz: The E1 out-
CDU
RDU
CMM
Appendix A - Normal and Abnormal Status of Boards
Confidential and Proprietary Information of ZTE CORPORATION 47
Name Description Color Abnormal Status
of-frame alarm
Red LED is on: The E1 line is broken or not connected
CLK Clock LED Green/Red Red LED is on: Clock fault
STA Status LED Green/Red Red LED flashes at 1 Hz: LAPD link disconnection
Red LED flashes at 4 Hz: HDLC link disconnection
Red LED is on: Other alarms such as temperature, clock or frame number alarms
Table 16 lists the abnormal status of the LEDs on TRM panel.
T AB L E 16 – AB N O R M AL S T A T U S O F T H E LED S O N TRM P AN E L
Name Description Color Abnormal Status
PWR Power LED Green/red Red LED is on: Alarm
Off: Power off or other reasons
RUN Running LED Green Red LED is on or flashes: The system is abnormal
MOD Channel mode LED
Green/red The red LED is on: BCCH blocked (including blocking of any extBCCH
ACT Channel activation LED
Green The red LED flashes: Channel blocking indication (SDCCH, TCH…)
The red LED is on: The CU is prohibited
STA Status LED Green/red Red LED flashes at 1 Hz: LAPD link
TRM
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Name Description Color Abnormal Status
disconnection
Red LED flashes at 4 Hz: HDLC link disconnection
Red LED is on: Other alarms such as temperature, clock or frame number alarms
Table 17 lists the abnormal status of the LEDs on CDU panel.
T AB L E 17 – AB N O R M AL S T A T U S O F T H E LED S O N CDU P AN E L
Name Description Color Abnormal Status
FPO Forward power output Green Off: Abnormal
SWR1 VSWR level-1 alarm Red On: Alarm
SWR2 VSWR level-2 alarm Red On: Alarm
PWR LNA power supply Green Off: Abnormal
LNA LNA alarm Red On: Alarm
Table 18 lists the abnormal status of the LEDs on RDU panel.
T AB L E 18 – AB N O R M AL S T A T U S O F T H E LED S O N RDU P AN E L
Name Description Color Abnormal Status
PWR LNA power supply Green Off: Abnormal
LNA LNA alarm Red On: Alarm
CDU
RDU
Confidential and Proprietary Information of ZTE CORPORATION 49
A p p e n d i x B
Replacing Modules and Parts
Precautions
The replacement defective modules and parts is a common and very important method used during routine maintenance. During module replacement, it is recommended to contact the relevant technicians or ZTE local maintenance staff for technical support and guidance.
The following principles should be considered necessary during the replacement of modules and parts:
Store undamaged spare parts in antistatic bags (moisture-proof bags are recommended). Sort the spare parts in cartons and label the cartons for easy identification.
Wear an antistatic wrist strap plugging/unplugging any module. Connect the antistatic wrist strap to the grounding terminal of the rack. Do not touch the grounding terminal after the connection.
Note: There is 1 MΩ resistor connected in series between the antistatic wrist strap and the grounding terminal, and any touch with the grounding terminal may bypass this resistor.
While holding a module, do not touch the circuits, components or wiring slots on the module. Do not plug/unplug the module with extra force. The right steps are as follows:
i. Hold the handles of the panel and slightly uplift the module.
ii. Align the module with the backplane and then insert the module slightly to avoid bending the pins or slots on the backplane or module.
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iii. Tighten the fixing screws on the module after inserting the module.
Use a torque spanner to plug/unplug the RF cable on the front panel of the rack. Do not use force to avoid destroying the RF cable connector.
While installing the feeder jumper, insert the connector of the feeder jumper into the socket of the AEM and tighten the connector by hand.
Indicate the cause of the fault in the modules and keep the defective modules in antistatic bags. Sort the modules and store them as suitable.
Install a standard dummy panel in the empty slot to protect against dust.
Make sure that the module is properly inserted in the slot.
Avoid hot plugging/unplugging during module replacement.
Ground the test instrument while using.
CMM Replacement
Antistatic wrist strap
Phillips screwdriver
1. Determine the necessity to replace the module through fault observation and analysis.
2. Prepare a new module of the same model as of the defective module.
3. Prepare an antistatic bag, a moisture-proof bag, a carton and labels for identification.
1. Turn off the power switch of CMM. See Appendix C for the location of the power switch.
2. Wear an antistatic wrist strap.
3. Perform the active/standby changeover before replacing the active CMM to make the standby module become active.
4. Loosen the fixing screws on the CMM panel and pull the handles on the defective module outwards with one hand. When the module leaves the slot and springs outwards, hold the lower edge of the module with the other hand, and then pull out the module slightly. During this operation, avoid touching the components and circuits on the module.
5. Keep the defective board in an antistatic bag, containing a moisture-proof bag. Label it indicating the module model, defective slot number, program version and fault. Store the defective module properly in a carton. Label the carton for easy identification in the future.
Tools
Preliminary Setup
Procedure
Appendix B - 错误!未定义样式。
Confidential and Proprietary Information of ZTE CORPORATION 51
6. According to the slot specified on the plug-in box, insert the spare CMM into the plug-in box. Push the module with proper force until it is in the proper location and then fasten the fixing screws.
7. Power-on the CMM again.
1. Self-test process starts on powering-on the CMM. Upon successful self-test, LEDs show normal state and the module recovers services, indicating the successful replacement.
2. If the module fails the self-test, it performs the self-test again and then shows the abnormity of the relevant unit, with the services not recovered, indicating replacement failure.
3. Analyze the fault through the foreground and background to make sure that the fault is caused by the module.
TRM/ETRM Replacement
Antistatic wrist strap
Phillips screwdriver
1. Determine the necessity to replace the module through fault observation and analysis.
2. Prepare a new module of the same model as of the defective module.
3. Prepare an antistatic bag, a moisture-proof bag, a carton and labels for identification.
4. Record the locations of RF cables on the front panel of the defective module, so as for easy restore of the cables after module replacement.
1. Turn off the power switch of TRM/ETRM. See Appendix C for the location of the power switch.
2. Wear an antistatic wrist strap.
3. Unplug the RF cables on the TRM/ETRM front panel.
4. Loosen the fixing screws on the TRM/ETRM panel and pull the handles on the defective module outwards with one hand. When the module leaves the slot and springs outwards, hold the lower edge of the module with the other hand, and then pull out the module slightly. During this operation, avoid touching the components and circuits on the module.
5. Keep the defective board in an antistatic bag, containing a moisture-proof bag. Label it indicating the module model, defective slot number, program version and fault. Store the defective module properly in a carton. Label the carton for easy identification in the future.
Confirmation
Tools
Preliminary Setup
Procedure
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6. According to the slot specified on the plug-in box, insert the spare TRM/ETRM into the plug-in box. Push the module with proper force until it is in the proper location and then fasten the fixing screws.
7. Power-on the TRM/ETRM again.
1. Self-test process starts on powering-on the CMM. Upon successful self-test, LEDs show normal state, and the module recovers services, indicating the successful replacement.
2. If the module fails the self-test, it performs the self-test again and then shows the abnormity of the relevant unit, with the services not recovered, indicating replacement failure.
3. Analyze the fault through the foreground and background to make sure that the fault is caused by the module.
AEM Replacement
Antistatic wrist strap
Phillips screwdriver
1. Determine the necessity to replace the module through fault observation and analysis.
2. Prepare a new module of the same model as of the defective module.
3. Prepare an antistatic bag, a moisture-proof bag, a carton and labels for identification.
4. Record the locations of RF cables (such as RF cables and feeder jumpers) on the front panel of the defective module, so as for easy restore of the cables after module replacement.
1. Turn off the power supply of AEM. The AEM is powered through the TRM/ETRM. Therefore, all the TRMs/ETRMs should be turned off. See Appendix C for the location of the power switch.
2. Wear an antistatic wrist strap.
3. Unplug the RF cables (such as RF cables and feeder jumpers) from the front panel.
4. Loosen the fixing screws on the AEM panel and pull the handles on the defective module outwards with one hand. When the module leaves the slot and springs outwards, hold the lower edge of the module with the other hand, and then pull out the module slightly. During this operation, avoid touching the components and circuits on the module.
5. Keep the defective board in an antistatic bag, containing a moisture-proof bag. Label it indicating the module model, defective slot number, program version and fault. Store the
Confirmation
Tools
Preliminary Setup
Procedure
Appendix B - 错误!未定义样式。
Confidential and Proprietary Information of ZTE CORPORATION 53
defective module properly in a carton. Label the carton for easy identification in the future.
6. According to the slot specified on the plug-in box, insert the spare AEM into the plug-in box. Push the module with proper force until it is in the proper location and then fasten the fixing screws.
7. Power-on the AEM again.
Self-test process starts on powering-on the CMM. Upon successful self-test, LEDs show normal state, and the module recovers services, indicating the successful replacement.
If the module fails the self-test, it performs the self-test again and then shows the abnormity of the relevant unit, with the services not recovered, indicating replacement failure.
Analyze the fault through the foreground and background to make sure that the fault is caused by the module.
PDM Replacement
Antistatic wrist strap
Phillips screwdriver
1. Determine the necessity to replace the module through fault observation and analysis.
2. Prepare a new module of the same model as of the defective module.
3. Prepare an antistatic bag, a moisture-proof bag, a carton and labels for identification.
1. Turn off the BTS main switch (ON/OFF) at the top of the cabinet, as shown in Figure 5.
Confirmation
Tools
Preliminary Setup
Procedure
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F I G U R E 5 – BTS M AI N S W I T C H
2. Wear an antistatic wrist strap.
3. Loosen the fixing screws on the PDM panel and pull the handles on the defective module outwards with one hand. When the module leaves the slot and springs outwards, hold the lower edge of the module with the other hand, and then pull out the module slightly. During this operation, avoid touching the components and circuits on the module.
4. Keep the defective board in an antistatic bag, containing a moisture-proof bag. Label it indicating the module model, defective slot number, program version and fault. Store the defective module properly in a carton. Label the carton for easy identification in the future.
5. According to the slot specified on the plug-in box, insert the spare PDM into the plug-in box. Push the module with proper force until it is in the proper location and then fasten the fixing screws.
6. Power-on the BTS main switch again.
1. Self-test process starts on powering-on the other modules (such as CMM and TRM). Upon successful self-test, LEDs show normal state, and the module recovers services, indicating the successful replacement.
2. If the module fails the self-test, it performs the self-test again and then shows the abnormity of the relevant unit, with the services not recovered, indicating replacement failure.
3. Analyze the fault through the foreground and background to make sure that the fault is caused by the module.
Confirmation
Appendix B - 错误!未定义样式。
Confidential and Proprietary Information of ZTE CORPORATION 55
MCMM Backplane Replacement
The MCMM backplane is replaced from the front side of the rack. The customer and relevant technical personnel must approve the backplane replacement, since the backplane replacement may influence the communication in a cell.
Antistatic wrist strap
Phillips screwdriver
1. Determine the necessity to replace the backplane through fault observation and analysis.
2. Prepare a new backplane of the same model as of the defective backplane.
3. Prepare an antistatic bag, a moisture-proof bag, a carton and labels for identification.
4. Record the slots for the modules on the defective backplane, so as for easy restore of the modules in their original slots after backplane replacement.
1. Turn off the power supply.
2. Wear an antistatic wrist strap.
3. Remove all the modules in the layer. Loosen the fixing screws on the modules and pull the handles on the module outwards with one hand. When the module leaves the slot and springs outwards, hold the lower edge of the module with the other hand, and then pull out the module slightly. During this operation, avoid touching the components and circuits on the module.
4. Loosen the screws fixing the backplane by using a cross screwdriver and remove the backplane.
5. Record the cable locations that are at the inner side of the backplane, so as for easy restore of the cables after backplane replacement.
6. Slightly pull cables outward to prevent them from dropping outside the shelf.
7. Fix the new backplane with screws.
8. Insert modules correctly into their original slots. Push the modules with proper force until it is in the proper location and then fasten the fixing screws.
9. Power-on the shelf of this layer and start the system again.
Self-test process starts on powering-on the shelf and then loads the module versions. Upon successful self-test, LEDs show normal state, and the module recovers services, indicating the successful replacement.
Tools
Preliminary Setup
Procedure
Confirmation
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If the module fails the self-test, it performs the self-test again and then shows the abnormity of the relevant unit, with the services not recovered, indicating replacement failure.
Analyze the fault through the foreground and background to make sure that the fault is caused by the module.
MTRM Backplane Replacement
The MTRM backplane is replaced from the front side of the rack. The customer and relevant technical personnel must approve the backplane replacement, since the backplane replacement may influence the communication in a cell.
Antistatic wrist strap
Phillips screwdriver
1. Determine the necessity to replace the backplane through fault observation and analysis.
2. Prepare a new backplane of the same model as of the defective backplane.
3. Prepare an antistatic bag, a moisture-proof bag, a carton and labels for identification.
4. Record the slots for the modules on the defective backplane and cable locations (such as RF cables and feeder jumpers), so as for easy restore of the modules in their original slots after backplane replacement.
1. Turn off the power supply.
2. Wear an antistatic wrist strap.
3. Unplug cables on all the module front panels on the layer.
4. Remove all the modules in the layer. Loosen the fixing screws on the modules and pull the handles on the module outwards with one hand. When the module leaves the slot and springs outwards, hold the lower edge of the module with the other hand, and then pull out the module slightly. During this operation, avoid touching the components and circuits on the module.
5. Loosen the screws fixing the backplane by using a cross screwdriver and remove the backplane.
6. Record the cable locations that are at the inner side of the backplane, so as for easy restore of the cables after backplane replacement.
7. Slightly pull cables outward to prevent them from dropping outside the shelf.
8. Record the physical location of the shelf in the layer indicated by the DIP switch on the backplane.
Tools
Preliminary Setup
Procedure
Appendix B - 错误!未定义样式。
Confidential and Proprietary Information of ZTE CORPORATION 57
9. Insert the new backplane and push it into the empty shelf. Attach the cables back into the sockets on the backplane. Apply proper force to insert the cables.
10. Set the DIP switch to the position as on the original backplane.
11. Fix the new backplane with screws.
12. Insert modules correctly into their original slots. Push the modules with proper force until it is in the proper location and then fasten the fixing screws.
13. Power-on the shelf of this layer and start the system again.
1. Self-test process starts on powering-on the shelf and then loads the module versions. Upon successful self-test, LEDs show normal state, and the module recovers services, indicating the successful replacement.
2. If the module fails the self-test, it performs the self-test again and then shows the abnormity of the relevant unit, with the services not recovered, indicating replacement failure.
3. Analyze the fault through the foreground and background to make sure that the fault is caused by the module.
Fan Module Replacement
Antistatic wrist strap
Phillips screwdriver
1. Determine the necessity to replace the backplane through fault observation and analysis.
2. Prepare a new backplane of the same model as of the defective backplane.
3. Prepare an antistatic bag, a moisture-proof bag, a carton and labels for identification.
1. Turn off the power supply of the fan module by turning off the power supply of TRM/ETRM. See Appendix C for the location of the power switch of TRM/ETRM.
Note: The fans start working immediately if the TRM/ETRM on the corresponding carrier shelf is powered-on. The fan power is directly introduced from the cabinet-top filter via the busbar.
2. Loosen the six spring screws on the fan plug-in box panel by to remove the fan plug-in box panel. Figure 6 shows the locations of the spring screws.
Confirmation
Tools
Preliminary Setup
Procedure
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F I G U R E 6 – LO C AT I O N S O F S P R I N G S C R E W S
1-6: Spring Screws
Tip: Functions of the spring screws:
Spring screws 2 and 5 fixes the panel and the fan plug-in box
Spring screws 1, 3, 4, and 6 fix the panel and the rack.
3. Loosen the two bolts that fasten the fan module to the chassis with a Phillips screwdriver, as shown in Figure 7.
F I G U R E 7 – LO O S E N I N G T H E B O L T S O F T H E F AN M O D U L E
1-2: Spring bolts
Appendix B - 错误!未定义样式。
Confidential and Proprietary Information of ZTE CORPORATION 59
4. Pull out the fan module along the guide rail.
5. Keep the defective module in a moisture-proof bag. Label the bag, indicating its model and the fault information. Keep the module in a carton. Label the carton for easy identification in future.
6. Insert the new module into the slots. Push the module with proper force into the backplane along the guide rail until it is in the proper location.
7. Fasten the fan module to the fan chassis with two bolts.
8. Power-on the fan module.
Observe the fans for their normal operation. If they are working normal, fix the spring screws on the fan plug-in box panel.
Trunk Cable Replacement
Antistatic wrist strap
Phillips screwdriver
1. Determine the necessity to replace the backplane through fault observation and analysis.
2. Make sure that the model of the new trunk cable is the same as that of the BTS trunk cable.
Note: The trunk cables are all digital cables of two specifications: 75 Ω coaxial cables and 120 Ω twisted-pair cables.
3. Check the labels at both ends of the trunk cable. Make sure that they are in one-to-one correspondence. That is, one end connects the trunk interface at the top of the BTS cabinet and the other end connects the trunk equipment.
4. Test the new trunk cable with a multimeter and ensure the trunk cable is not shorted or disconnected.
5. Prepare a moisture-proof bag, a carton and labels for identification.
During the operation, take care of the insulation layer of the digital trunk cable. Negligence may damage the trunk cable.
Caution: Replacing a trunk cable will interrupt services of the BTS.
1. Cut the cable ties of the trunk cable to be replaced. Unplug the E1 PORT connector of the trunk cable from the top of the cabinet to remove the trunk cable. Figure 8 shows the location of the E1 PORT interface at the top of the cabinet.
Confirmation
Tools
Preliminary Setup
Precautions
Procedure
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F I G U R E 8 – LO C AT I O N O F T H E E1 PORT AT T H E TO P O F T H E C AB I N E T
E1 PORT
Caution: Do not apply immense force while removing the old trunk cable.
2. Keep the defective trunk cable in a moisture-proof bag. Label the bag, indicating its model and the fault information. Keep the module in a carton. Label the carton for easy identification in future.
3. Connect the connector of the new trunk cable according to the labels at both ends of the new trunk cable to the E1 PORT interface at the top of the cabinet and to the trunk equipment.
1. Check if the RF connector of the trunk cable is reliable and is connected in the proper manner.
2. If everything is normal, bind the trunk cable with cable ties in accordance with the binding requirements of the trunk cable.
RF Cable Replacement
Antistatic wrist strap
Phillips screwdriver
1. Determine the RF cable to be replaced.
2. Different sites require different cable suites. Select the cable suites according to the requirements of new changed site type.
Confirmation
Tools
Preliminary Setup
Appendix B - 错误!未定义样式。
Confidential and Proprietary Information of ZTE CORPORATION 61
3. Check if the grounding core wire of the new cable is in good contact and if the pins of the core wire are normal. Make sure that the contacts of SMA or N connector are reliable.
4. Record all the connection positions of the RF cable to be replaced.
5. Prepare a moisture-proof bag, a carton and labels for identification.
1. Turn off the power of the corresponding TRMs/ETRMs (including PAs and TRUs) before replacing the transmitting RF cable. See Appendix C for the location of the power switch.
2. Loosen the SMA or N connectors at both ends of the RF cable to remove the cable.
3. Keep the defective RF cable in a moisture-proof bag. Label the bag, indicating cables model and fault information. Store it properly in a carton. Label the carton for easy identification in the future.
4. Connect the new RF cable according to the original connection mode of the old RF cable.
Caution: Apply even force during the operation. While tightening the SMA connector screws, apply proper force and shake it to align with the socket without damage.
5. Power-on the TRMs/ETRMs (including PAs and TRUs) again.
1. Observe the LEDs of each board. Upon successful replacement the LEDs shows the normal status.
2. Dial calls to check if the BTS runs normally after the replacement.
Cabinet-Top 1/2'' Soft Jumpers Replacement
LDF4 block cutter
LDF4 block installation tool
Two Adjustable wrenches
Hacksaw
Needle file
Paper knife
Adjustable hot air blower
Multimeter
Antenna feeder analyzer (SiteMaster)
1. Determine the necessity to replace the 1/2 inch soft jumper at the cabinet top through fault observation and analysis.
Procedure
Confirmation
Tools
Preliminary Setup
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2. Prepare a new spare part of the same model as of the defective part.
3. Prepare a moisture-proof bag, a carton and labels for identification.
1. Turn off the power switch of TRMs/ETRMs of the corresponding carrier shelf. See Appendix C for the location of the power switch.
2. Remove the jumper by an adjustable wrench. Remove the connectors at its two ends and check if the connectors are damaged. Replace the connectors if they are damaged.
3. Keep the defective jumper in a moisture-proof bag. Label it indicating the model and fault information. Store it in a carton and label the carton for easy identification in the future.
4. Test the new jumper, especially its connectivity with a multimeter.
Caution: Correctly dispose of the feeder residues. If sundries such as copper scraps enter the connector, it affects the performance of the antenna feeder system.
5. Connect the new jumper.
6. At the other end of the jumper, measure the performance indices of the antenna feeder by using an antenna feeder analyzer (SiteMaster).
7. If the indices are normal, connect the jumper to the antenna feeder interface at the top of the cabinet.
8. Power-on all the TRMs/ETRMs of the corresponding carrier shelf on the PDM panel.
1. Observe the running status of the TRMs/ETRMs and AEMs. Upon successful replacement the LEDs shows the normal status.
2. Dial calls to check if the BTS runs normally after the replacement.
Procedure
Confirmation
Confidential and Proprietary Information of ZTE CORPORATION 63
A p p e n d i x C
PDM Front Panel Power Switches
The TRM and CMM Power switches are on the PDM front panel, as shown in Figure 9.
F I G U R E 9 – PO W E R S W I T C H O F T H E TRM AN D CMM O N PDM FR O N T PAN E L
CMM2CMM1SLOT3-2 SLOT3-3 SLOT3-4SLOT3-1
SLOT2-1 SLOT2-4SLOT2-2 SLOT2-3SLOT1-4SLOT1-3SLOT1-2SLOT1-1
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFFOFF
ON ON
OFFOFF
ON ON
OFF
ON
OFF
ON
PDM
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Table 19 shows the physical correspondence between power switches and the controlled carriers of TRM.
T AB L E 19 – PH Y S I C AL C O R R E S P O N D E N C E B E T W E E N P O W E R S W I T C H E S AN D T H E C O N T R O L L E D C AR R I E R S O F TRM
Power Switch
Carrier Power Switch
Carrier
Slot 1-1 The first carrier module in the first-layer carrier shelf
Slot 2-3 The third carrier module in the second-layer carrier shelf
Slot 1-2 The second carrier module in the first-layer carrier shelf
Slot 2-4 The fourth carrier module in the second-layer carrier shelf
Slot 1-3 The third carrier module in the first-layer carrier shelf
Slot 3-1 The first carrier module in the third-layer carrier shelf
Slot 1-4 The fourth carrier module in the first-layer carrier shelf
Slot 3-2 The second carrier module in the third-layer carrier shelf
Slot 2-1 The first carrier module in the second-layer carrier shelf
Slot 3-3 The third carrier module in the third-layer carrier shelf
Slot 2-2 The second carrier module in the second-layer carrier shelf
Slot 3-4 The fourth carrier module in the third-layer carrier shelf
Note:
Definition of the carrier shelf layers: From bottom to top, there are, the first layer, the second layer, and the third layer in the cabinet.
Definition of the numbers of carrier modules in a carrier shelf: From left to right, there are carrier modules 1, 2, 3, and 4.
Table 20 describes the physical correspondence between power switches and CMMs.
T AB L E 20 – PH Y S I C AL C O R R E S P O N D E N C E B E T W E E N P O W E R S W I T C H E S AN D CMM S
Power Switch
Description Power Switch
Description
CMM1 Controls the power supply of the CMM of the upper shelf
CMM2 Controls the power supply of the CMM of the lower shelf
Confidential and Proprietary Information of ZTE CORPORATION 65
A p p e n d i x D
RF Awareness and Control Information
FCC Statement
Before using this GSM Macro Base Transceiver Station, read this important RF energy awareness and control information and operational instructions to ensure compliance with the FCC RF exposure guidelines.
Working with the equipment while in operation, may expose the technician to RF electromagnetic fields that exceed FCC rules for human exposure. Visit the FCC website at www.fcc.gov/oet/rfsafety to learn more about the effects of exposure to RF electromagnetic fields.
Changes or modifications to this unit not expressly approved by the party responsible for compliance will void the user’s authority to operate the equipment. Any change to the equipment will void FCC grant.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to the FCC Rules. This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.
For OUTDOOR use, a Directional Antenna with a maximum gain of 17 dBi is authorized for use with this unit. Outdoor antennas must be positioned to observe minimum separation of 4 m (13.12 feet) for 850 MHz unit and 3 m (9.84 feet) for 1900 MHz unit from all users and bystanders. For the protection of personnel working in the vicinity of outdoor antennas, the following guidelines for minimum distances between the human body and the antenna must be observed.
The installation of an OUTDOOR antenna must be such that, under normal conditions, all personnel cannot come within 4 m
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(13.12 feet) for 850 MHz unit and 3 m (9.84 feet) for 1900 MHz unit from the outdoor antenna. Exceeding this minimum separation will ensure that the worker or bystander does not receive RF-exposure beyond the Maximum Permissible Exposure according to section 1.1310, Limits for Controlled Exposure.
CE Statement
Before using this GSM Macro Base Transceiver Station, read this important RF energy awareness and control information and operational instructions to ensure compliance with the CE RF exposure guidelines.
The assessment of compliance boundary is performed by calculation in accordance with EN50383:2002.
Changes or modifications to this unit not expressly approved by the party responsible for compliance will void the user’s authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to the CE Rules. This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.
For OUTDOOR use, a Directional Antenna with a maximum gain of 11 dBi is authorized for use with this unit. Outdoor antennas must be positioned to observe minimum separation of 4.2 m (13.78 feet) for 900 MHz unit and 3 m (9.84 feet) for 1800 MHz unit from all users and bystanders. For the protection of personnel working in the vicinity of outdoor antennas, the following guidelines for minimum distances between the human body and the antenna must be observed.
The installation of an OUTDOOR antenna must be such that, under normal conditions, all personnel cannot come within 4.2 m (13.78 feet) for 900 MHz unit and 3 m (9.84 feet) for 1800 MHz unit from the outdoor antenna. Exceeding this minimum separation will ensure that the worker or bystander does not receive RF-exposure beyond the Maximum Permissible Exposure according to section EN50383:2002, Limits for Controlled Exposure.
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A p p e n d i x E
Abbreviations
Abbreviation Full Name
A
Abis Abis Interface
AEM Antenna Equipment Module
B
BCCH Broadcast Control Channel
BER Bit Error Rate
BSC Base Station Controller
BSS Base Station Subsystem
BTS Base Transceiver Station
C
CDU Combiner Distribution Unit
CKU Clock Unit
CMM Controller & Maintenance Module
E
E1 European Standard for Digital Transmission
ETP External Test Port
ETRM Enhanced Transceiver Module
extBCCH Extended BCCH
F
FUC Frame Unit Controller
G
Gb Gb Interface
GSM Global System for Mobile communication
H
HW High Way
L
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Abbreviation Full Name
LAPD Link Access Protocol on D-Channel
LMT Local Management Terminal
LNA Low Noise Amplifier
M
MCMM Backplane of CMM
MS Mobile Station
MTRM Backplane of TRM
N
NE Network Element
O
OMC Operation & Maintenance Center
OMCR Operation & Maintenance Center Radio
P
PA Power Amplifier
PDM Power Distribution Module
R
RDU Radio Distribution Unit
RF Radio Frequency
RL Radio Link
S
SDCCH Standalone Dedicated Control Channel
SWR Standing Wave Ratio
T
TCH Traffic Channel
TRU Transceiver Unit
TRM Transceiver Module
TTA Tower Top Antenna
V
VSWR Voltage Standing Waver Ratio
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A p p e n d i x F
Figures
Figure 1 – Location of 13M Clock Testing Interface in the Cabinet..................................................................................... 24 Figure 2 – Angle Gauge ..................................................... 29 Figure 3 – Measuring the Object With an Angle Gauge (I)....... 30 Figure 4 – Object measurement with the Angle Gauge (II) ..... 31 Figure 5 – BTS Main Switch................................................ 34 Figure 6 – Locations of Spring Screws ................................. 34 Figure 7 – Loosening the Bolts of the Fan Module .................. 34 Figure 8 – Location of the E1 PORT at the Top of the Cabinet.. 34 Figure 9 – Power Switch of the TRM and CMM on PDM Front Panel .............................................................................. 34
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A p p e n d i x G
Tables
Table 1 – Chapter Summary ................................................x Table 2 – Typographical Conventions.................................... xi Table 3 – Mouse Operation Conventions .............................. xii Table 4 – Daily Maintenance Record Form ............................ 34 Table 5 – Weekly Maintenance Record Form......................... 34 Table 6 – Quarterly Maintenance Record Form...................... 34 Table 7 – Yearly Maintenance Record Form .......................... 34 Table 8 – Emergency Troubleshooting Record Form............... 34 Table 9 – Board Replacement Data Record Form................... 34 Table 10 – Normal Status of the LEDs on CMM Panel ............. 34 Table 11 – Normal Status of the LEDs on TRM Panel .............. 34 Table 12 – Display of the Channel Activation LED (ACT) ......... 34 Table 13 – Normal Status of the LEDs on CDU Panel.............. 34 Table 14 – Normal Status of the LEDs on RDU Panel.............. 34 Table 15 – Abnormal Status of the LEDs on CMM Panel .......... 34 Table 16 – Abnormal Status of the LEDs on TRM Panel........... 34 Table 17 – Abnormal Status of the LEDs on CDU Panel........... 34 Table 18 – Abnormal Status of the LEDs on RDU Panel........... 34 Table 19 – Physical Correspondence between Power Switches and the Controlled Carriers of TRM...................................... 34 Table 20 – Physical Correspondence between Power Switches and CMMs ....................................................................... 34
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A p p e n d i x H
Index
Abnormal status..................52 CMM..............................51 RDU ..............................53
Air conditioner(s) ................20 Air filters ...........................29 Alarm messages ...................5 Alarms
Current alarms..................9 Environmental alarms ......21 Fan alarms .....................22 Frequency analysis ..........14 History alarms
24-Hour .......................9 Past week...................13
Angle gauge .......................33 Antenna.............................32 Antenna Equipment Module
(AEM) ...................... 22, 32 Antenna feeder ............. 32, 35 Antennas tilt................. 33, 34 BTS main switch .................59 Burglarproof Nets check .......19 Call loss.............................19 Cells status (real time).........10 Cleanliness.........................20 Clock calibration .................27 Code slip............................23 Communication link failure ...23 Controller & Maintenance
Module (CMM),.......... 22, 70 Conversation test ................19 Coverage ...........................19 Coverage test .....................19 DC voltage (nominal)...........22 Disaster protection ..............21 Doors check .......................19 Fans..................................22 Firefighting facilities ............21 Fluctuation range ................22 Front-end ..........................26 Grounding......7, 31, 35, 55, 67 Grounding cables ................31 Grounding clips check ..........35
Grounding down-lead .......... 32 Grounding resistance........... 31 GSM1800 .......................... 26 GSM900 ............................ 26 Handover .......................... 19 Handover test .................... 19 History Notification messages
24-Hour......................... 10 Past week ...................... 14
Humidity .................. 7, 20, 21 Long-term (operating) ..... 20 Short-term (operating) .... 20
Iron towers........................ 36 Isolation..............................6 LED status analysis ...............5 Lighting............................. 21 Lightning arresters.........30, 31 Lightning ground ..................7 Local Maintenance Terminal
(LMT) .......................27, 28 Mast ................................. 36 MCMM backplane ................ 61 MTRM backplane................. 62 Normal status
CDU .............................. 50 CMM.............................. 47 RDU .............................. 50 TRM .............................. 48
OMCR .................................6 OMCR version ......................2 Operation log .......................5 Output power................25, 26 Performance analysis ............6 Performance indices ... 6, 17, 68 Performance management
interfaces.........................6 Performance report ........15, 17
Daily ............................. 11 Monthly ......................... 17 Weekly .......................... 15
Plugging/unplugging..............6 Power amplifier common
problems ....................... 26
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Power Distribution Module (PDM)............................... 59, 69
Power supply ..................... 22 Power switches
CMM ............................. 69 TRM.............................. 69
Precautions ....................7, 55 Principle Equipment Check
Quarterly....................... 22 Yearly ........................... 25
Rear-end........................... 26 Replacing modules
AEM.............................. 58 Cabinet-Top 1/2'' Soft
Jumpers..................... 67 CMM ............................. 56 Fan module.................... 63 MCMM backplane ............ 61 MTRM backplane............. 62 PDM.............................. 59 RF cable ........................ 66 TRM.............................. 57 Trunk cable.................... 65
Safety Equipment room..............21
Self-test ..............................6 Signaling tracing interface ......6 SiteMaster .........26, 30, 67, 68 Sockets .............................21 Spare parts .................. 17, 55 Temperature ....... 7, 20, 21, 24
Long-term (operating)......20 Short-term (operating).....20
Towers ..............................32 Transceiver Module (TRM) ....22 Troubleshooting LEDs
ACT .................... 24, 49, 50 CLK ......................... 23, 28 MOD........................ 24, 49 PWR ........................ 23, 24 RUN ........................ 23, 24 STA ......................... 23, 24 SYN...............................23
VSWR..................... 26, 27, 32 Waterproof.........................35 Windows check ...................19