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User Manual
Airbridge cBTS3612-450 12-carrier CDMA Base Station
IV. Other faults
To other faults and those which cannot be eliminated after the above procedures,
please first reset the corresponding BCPM. If the equipment still cannot work normally,
the fault may be located to this BCPM and this board needs replacing.
6.6 BTS Resource Distribution Module (BRDM)
6.6.1 Description of Fault
FPGA status fault.
l
The low layer communication link between BRDM and BTRM is faulty.
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Abnormal clock signal.
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Board hardware fault.
l
6.6.2 Fault Analysis and Location
I. FPGA status fault
To the FPGA status error, it is necessary to reload the software of FPGA firstly. If the
fault still exists, it is a board hardware fault and the board needs replacing.
II. The low layer communication link between BRDM and BTRM is faulty
The low layer communication link fault between BRDM and BTRM is usually caused
by an excessively high communication link error code rate or abnormal running of the
board. You may plug/unplug the optical fiber or replace the BTRM. If this fault exists
for a long time, please reset or replace this BRDM.
III. Abnormal clock signal
The clock used for the switching of BRDM control services comes from the BCKM. If
the BCKM works normally(abnormally), this fault may be occurred. First check
whether BCKM board phase-lock is normal. If it is normally, try to load FPGA logic. If
the fault still exists after the above, procedures, it means that some faults may occur
to the hardware and this BRDM needs replacing.
IV. BRDM boad hardware fault
The BRDM board hardware fault usually is due to components being damaged or
wrong logic being loaded and the board needs replacing.
6.7 BTS Transceiver Module (BTRM)
6.7.1 Description of Fault
Overexcited receiving channel
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Software phase-lock lost
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Abnormal forward link power
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Abnormal reverse signal strength indication
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RS485 link fault alarm
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03Q-0112-20020720-120
6 Part Module Fault
6-7
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