Zte ZXG10 BS21 User manual

ZXG10BS21
Compact Outdoor BTS for GSM
Maintenance Manual
Version 2.2
ZTE CORPORATION
ZTE Plaza, Keji Road South,
Hi-Tech Industrial Park,
Nanshan District, Shenzhen,
P. R. China
518057
Tel: [phone] 800-9830-9830
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Revision History
Date Revision No. Serial No. Description
05/17//2005 R1.0 sjzl20051442
05/19/2007 R1.1 sjzl20051442 Updated

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Document
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Contents
About this Maintenance Manual ...............................................................xi
Purpose of this Maintenance Manual........................................................................ xi
Typographical Conventions .....................................................................................xii
Mouse Operation Conventions................................................................................xiii
How to Get in Touch ............................................................................................. xiii
Customer Support .................................................................................................................xiii
Documentation Support.........................................................................................................xiii
Chapter 1........................................................................................ 1
Maintenance Security.................................................................................1
Overview ............................................................................................................... 2
Symbol Description ................................................................................................. 2
Toxic Substances .................................................................................................... 4
Beryllia ...................................................................................................................................4
Hydrochloride..........................................................................................................................4
Electrical Safety ...................................................................................................... 5
Tools ......................................................................................................................................5
High Voltage ...........................................................................................................................5
Power Cord .............................................................................................................................5
Drilling ....................................................................................................................................5
Thunder ..................................................................................................................................6
Antistatic ............................................................................................................... 6
Storage Battery ...................................................................................................... 7
Short Circuit............................................................................................................................8
Hazardous Gases ....................................................................................................................8
High Temperature ...................................................................................................................8
Acid Liquid ..............................................................................................................................8
Storage Battery Replacement ..................................................................................................9
Electromagnetic Radiation ....................................................................................... 9
Working at Heights ............................................................................................... 10
Hoisting Heavy Objects..........................................................................................................10
Using Ladders .......................................................................................................................10
Fans .................................................................................................................... 11

High Temperature ................................................................................................ 11
Board Plugging/Unplugging ................................................................................... 11
Do-Nots ............................................................................................................... 12
Chapter 2......................................................................................13
Maintenance Overview............................................................................ 13
Categories of Daily Maintenance............................................................................. 14
Common Maintenance Methods ............................................................................. 14
Precautions on Daily Maintenance .......................................................................... 16
Chapter 3......................................................................................19
Routine Maintenance .............................................................................. 19
Daily Routine Maintenance .................................................................................... 20
Viewing Current Alarms .........................................................................................................20
Viewing Alarms in Each Module .............................................................................................. 22
Viewing Current Notification Information ................................................................................ 25
Viewing Real-time Attributes of a Carrier ................................................................................29
Creating Daily Performance Report......................................................................................... 30
Creating a Daily Traffic Report................................................................................................35
Weekly Routine Maintenance ................................................................................. 39
Viewing History Alarms..........................................................................................................39
Collecting Alarm Frequency Statistics ..................................................................................... 44
Analyzing Performance Report ............................................................................................... 48
Monthly Routine Maintenance ................................................................................ 48
Creating Monthly Performance Report .................................................................................... 48
Collecting Statistics of Bad Cells .............................................................................................53
Analyzing and Processing Reports .......................................................................................... 57
Generating Monthly Operation Report..................................................................................... 58
Biannual Routine Maintenance ............................................................................... 58
Checking BS21 AC Power ...................................................................................................... 59
Checking Running Status of Heat Exchanger........................................................................... 60
Checking Dust-Proof Status ................................................................................................... 60
Checking Running Status of CMM Module ............................................................................... 61
Checking Running Status of ETRM Module .............................................................................. 64
Checking Running Status of ECDU Module .............................................................................. 67
Measuring Amplifier Output Power ......................................................................................... 69
Measuring SWR of Antenna Feeder ........................................................................................ 69
Calibrating Clock ...................................................................................................................71
Checking Fastness of Antennae and Towers............................................................................ 72
Checking Obliquity of Directional Antennae ............................................................................. 72
Checking whether Antenna Feeder Connectors and Lightning Protection Grounding Kit are
Waterproof............................................................................................................................74

Checking E1 Interfaces ..........................................................................................................75
Checking Antenna Feeder Interfaces ...................................................................................... 76
Checking Whether Lightning Protection Arrester is in Good Condition ....................................... 76
Checking whether Grounding Cable is Reliable ........................................................................78
Grounding Resistance Test..................................................................................................... 78
Checking Running Status of Transmission Equipment.............................................................. 79
Checking Running Status of UPS ............................................................................................ 79
Chapter 4......................................................................................81
Notification and Handling ....................................................................... 81
Summary of Notification Information...................................................................... 82
No Traffic Notification in BS Cell ............................................................................. 82
Chapter 5......................................................................................85
Alarms and Handling............................................................................... 85
Summary of Alarms.............................................................................................. 86
CMM Alarms......................................................................................................... 90
CMM Power Failure ................................................................................................................90
LAPD Long-Time Link Disconnection ....................................................................................... 91
CMM's FLASH Programming Failure ........................................................................................ 92
HW Long Time Link Disconnection.......................................................................................... 92
Power Over/Under-Voltage Alarms ......................................................................................... 93
Clock Exceptions (13M, FCLK, SYNCLK).................................................................................. 93
Software Accumulative Frame Number Inconsistent with Hardware Accumulative Frame Number
............................................................................................................................................94
Alarms of Communication Link to Main Rack........................................................................... 95
Alarm with Communication Link between Master Rack and Left/Right Slave Rack.....................95
E1 Carrier Wave Receiving Alarm (A, D and E interfaces) ........................................................ 96
Out-of-Frame Alarm at Receiving End of E1 interfaces (A, D and E interfaces).......................... 97
Forward Slip Code Indication at Transmitting End of E1 Interfaces (A, D and E interfaces) ........ 97
Backward Slip Code Indication at Transmitting End of E1 Interfaces (A, D and E Interfaces) .....98
Forward Slip Code Indication at Receiving End of E1 Interfaces (A, D and E Interfaces) ............99
Backward Slip Code Indication at Receiving End of E1 Interfaces (A, D and E Interfaces) ........ 100
ETRM Alarm ....................................................................................................... 101
Dry Contact Alarm............................................................................................................... 101
LNA (Low Noise Amplifier) Alarm.......................................................................................... 102
Power Alarm for Tower Mounted Amplifier ............................................................................ 102
AEM SWR Minor Alarm ........................................................................................................ 103
AEM SWR Major Alarm ........................................................................................................ 103
AEM Power Alarm ................................................................................................................ 104
AEM Type Alarm.................................................................................................................. 104
AEM Not-in-Position Alarm ................................................................................................... 105
TPU’s CHP DSP0 Initialization Failure .................................................................................... 105

TPU’s CHP DSP1~3 Initialization Failure................................................................................ 106
RFAD6620 Initialization Failure............................................................................................. 107
RFAD6620 Resource Unavailable.......................................................................................... 107
CIP Resource Unavailable .................................................................................................... 108
TPU’s FLASH MEMORY Error................................................................................................. 109
WATCHDOG Overflow in TPU’s CHP DSP0............................................................................. 109
WATCHDOG Overflow in TPU’s CHP DSP1~3 ........................................................................ 110
WATCHDOG Overflow in FUC ............................................................................................... 111
Parameter Configuration Error in TPU’s Channel 0~7 ............................................................ 111
Inconsistent Cell Parameter Configuration............................................................................. 112
Inconsistent FUC Software Versions ..................................................................................... 112
Inconsistent CHP Software Versions ..................................................................................... 113
Temporary No Response from FUC’s L3 Software.................................................................. 113
Disconnected LAPD Link between FUC and BSC .................................................................... 114
Interrupted Communication between CMM and FUC ............................................................. 115
TPU’s CIP Initialization Failure .............................................................................................. 116
CIP Parameter Configuration Error ....................................................................................... 116
WATCHDOG Overflow in TPU’s CIP....................................................................................... 117
Inconsistent CIP Software Versions ...................................................................................... 117
Alarm with Clock between TPU and CMM .............................................................................. 118
TPU Power Alarm ................................................................................................................ 119
TPU Frame Number Alarm ................................................................................................... 119
Receiving RF Local Oscillator PLL1~2 out of Lock .................................................................. 120
Transmitting RF Local Oscillator PLL1~2 out of Lock .............................................................. 121
52 M Reference Clock PLL Out of Lock .................................................................................. 121
Transmitting IF Local Oscillator PLL Out of Lock..................................................................... 122
PA Voltage SWR Alarm ........................................................................................................ 123
PA Overheat Minor Alarm..................................................................................................... 123
PA Overheat Major Alarm .................................................................................................... 124
PA Output Power Alarm ....................................................................................................... 124
PAS Power Amplifier Power Supply Over-voltage Alarm......................................................... 125
PAS Power Amplifier Power Supply Under-voltage Alarm ....................................................... 125
DLRC_AL Downward Link Check Error .................................................................................. 126
Chapter 6....................................................................................127
Troubleshooting .................................................................................... 127
Summary of Common Problems .......................................................................... 128
List of Major Faults.............................................................................................. 129
Troubleshooting Procedure of Components Failures ............................................... 129
Troubleshooting at BS Commissioning Stage......................................................... 130
BS Works Normally but Mobile Phone Has no Signals or Cannot Access Network .................... 130
Handling of SWR Major Alarms............................................................................................. 132

Poor Conversation Quality at BS........................................................................................... 134
Troubleshooting in BS Maintenance Stage............................................................. 137
Shrinkage of BS Coverage ................................................................................................... 137
Cell Carrier not Occupied ..................................................................................................... 140
LAPD Broken-Link of BS Carrier............................................................................................ 142
BS in Normal Status but BS Handover Is Abnormal............................................................... 147
Handling Lightning-Stricken BS Faults .................................................................................. 149
MS Signal is not Stable in Idle State ..................................................................................... 151
Unstable MS Signal in Conversation...................................................................................... 153
TCH Assigned with Low Success Ratio and Calls Are Difficult to Get through ........................... 154
MS Echo during Conversation............................................................................................... 156
Troubleshooting in BS Cutover and Expansion Stages ............................................ 158
Unidirectional Mobile Phone Calls.......................................................................................... 158
SDCCH Occupied too Long................................................................................................... 160
Call Drop Rate in Cell Rises Suddenly ................................................................................... 163
Chapter 7....................................................................................167
Collection of Maintenance Experience.................................................. 167
Reference for Wireless Parameters Adjustment during Commissioning .................... 168
Adjusting List of Adjacent Cells and List of Carrier-Sense Frequencies .................................... 168
Adjusting Wireless Parameters ............................................................................................. 170
Others ................................................................................................................................ 171
Analysis of Bird928 Mobile Phone’s Failure to Access Network................................. 172
Configuration Method for Intra-Cell Handover ....................................................... 174
Appendix A .................................................................................175
Replacement of Modules and Parts ...................................................... 175
Overview ........................................................................................................... 175
CMM Replacement .............................................................................................. 176
ETRM Replacement............................................................................................. 177
AEM Replacement............................................................................................... 178
PSM Replacement............................................................................................... 179
Power Lightning Protection Module Replacement ................................................... 180
Backplane Replacement ...................................................................................... 181
Heat Exchanger Replacement .............................................................................. 182
Trunk Cable Replacement.................................................................................... 183
RF Cable Replacement ........................................................................................ 184
Antenna Feeder Lightning Arrester replacement .................................................... 185
Cabinet-Bottom 1/2 Soft Jumper Replacement...................................................... 187
Tower Top 1/2” Soft Jumper Replacement ............................................................ 188
Feeder Connectors Replacement .......................................................................... 190

Tower Amplifier Replacement .............................................................................. 191
Antenna Replacement ......................................................................................... 192
Appendix B .................................................................................195
Common Maintenance Tables............................................................... 195
Daily Maintenance Record Table........................................................................... 195
Weekly Maintenance Record Table ....................................................................... 196
Monthly Maintenance Record Table ...................................................................... 197
Biannual Maintenance Record Table ..................................................................... 198
Emergency Failure Record Table .......................................................................... 199
Appendix C .................................................................................201
Use of Common Instruments and Meters ............................................ 201
SAGEM (OT35) Test Mobile Phone........................................................................ 201
Basic Functions ................................................................................................................... 201
Operation Description .......................................................................................................... 202
Engineering Test Mode of ZTE289 Mobile Phone .................................................... 211
Key Description ................................................................................................................... 211
How to Enter Engineering Mode ........................................................................................... 211
How to Close Engineering Mode ........................................................................................... 211
Instructions of Engineering Mode Menu ................................................................................ 211
BIRD Power Meter .............................................................................................. 214
BIRD Power Meter Components ........................................................................................... 214
Usage ................................................................................................................................. 215
HP8954E Spectrum Analyzer ............................................................................... 217
Components ....................................................................................................................... 218
Usage ................................................................................................................................. 218
Antenna Feeder Tester (SITE MASTER S332B) ...................................................... 222
Procedure for Testing SWR .................................................................................................. 222
Test Procedure of DTF ......................................................................................................... 223
Appendix D.................................................................................225
Operation Maintenance Quality Indexes of Certain Telecom Network
(Wireless Part)...................................................................................... 225
Abbreviations .............................................................................227
Figures........................................................................................233
Tables .........................................................................................235