Chapter 6 - Troubleshooting
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5.
The fault locating flow is as shown in Figure 83.
F
I G U R E
8 3
F
A U L T
L
O C A T I N G
F
L O W O F
S
U D D E N
R
I S I N G
C
A L L
D
R O P
R
A T E I N A
C
E L L
Start
Whether there exists
co-frequency
interference
End
Adjust the
frequency point
data
YES
YES
NO
YES
Whether the antenna
feeder system is
changed
Whether transmission
is normal
Adjust the antenna
direction angle and
the elevation angle
Whether there are
new obstacles in the
surrounding
Adjust the antenna
direction angle and
the elevation angle
YES
NO
NO
NO
YES
Remove the
transmission
fault
Block the TCH
channel
of other carriers
Whether the carrier
can be occupied for
a short time
Whether divider-TRM RF
cable connection is reliable
Remove the
divider-TRM
connection
problem
NO
Remotely reset
the TRM and
replace it
YES
NO
Whether the SWR
level-1 alarm indicator
on the AEM module
panel is on
Remove the fault of
the antenna feeder
system
YES
NO
YES
Whether network
parameters are changed
Adjust the
network parameters
NO
