ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual
138
Confidential and Proprietary Information of ZTE CORPORATION
5.
Fault locating flow is as shown in Figure 70.
F
I G U R E
7 0
F
A U L T
L
O C A T I N G
F
L O W
C
H A R T O F
S
H R I N K A G E O F
B S
C
O V E R A G E
Start
YES
NO
Whether the antenna is
damaged
YES
Replace the antenna
Whether there are changes to
the wireless parameters
Adjust wireless
parameters
YES
NO
Whether there exist strong
interference sources in the
surrounding
Reduce the
influence
of external
interference
YES
Check whether the TRM-AEM
RF cable connection is reliable
Remove the
TRM-AEM cable
connection problems
NO
End
NO
Check whether the SWR
level-1 alarm indicator on the
AEM module panel is on
Remove the fault
of the antenna
feeder system
NO
YES
YES
Whether the output power
of the PA is normal
YES
Adjust power
control and
replace the TRM
NO
Check whether there
are obstacles in
the surrounding
Whether the antenna
direction angle and the elevation
angle are changed
Adjust the antenna
direction angle and
its mounting height
NO
YES
NO
Adjust the antenna
direction angle and
the elevation angle
