ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual
148
Confidential and Proprietary Information of ZTE CORPORATION
5.
The fault locating flow is as shown in Figure 75.
F
I G U R E
7 5
F
A U L T
L
O C A T I N G
F
L O W F O R A
N
O R M A L
B S
B U T W I T H
A
B N O R M A L
B S
H
A N D O V E R
Start
YES
NO
YES
End
Change the clock
synchronization mode
NO
Adjust the handover
parameter
Whether there are clock alarms
Remake adjacent
cell data
Use LMT to check the
13M clock and calibrate it
Reset the CMM
Whether handover is normal
NO
NO
YES
Whether the handover
parameter is proper
Whether performance indices
are normal
Handle them properly
according to
the abnormal indices
NO
YES
6.
Troubleshooting
i.
Check whether the performance indexes of the current cell are
normal.
ii.
Check whether the handover data of the current cell with the
adjacent cells are correct. If yes, delete the data of the adjacent
cells and configure it again. If the fault remains, go on to the next
step.
