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ALD Alarm Solutions
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2013-3-25
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Contents 1
RF Unit ALD Current Out of Range.........................................................................................3
2
ALD Maintenance Link Failure................................................................................................3
3
RET Antenna Not Calibrated RET Antenna Motor Fault......................................................6
4
RET Antenna Running Data and Configuration Mismatch ......................................................7
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The solutions in the document are the operation method for particular alarm. Actually, sometimes the different alarms will rise in a site or sector. One alarm may be caused by another. Hence, we need to distinguish the priority of these alarms when handle them. The structure of the document follows the priority (like the contents).
1 RF Unit ALD Current Out of Range Alarm Reason: The ALD current alarm thresholds is setting properly; Installation or
connection problem. Solution: When the alarm is rising without any operation, the firs the first thing is to
check the configuration of current alarm threshold. If the threshold is right, that means there is some mistake existing in physical line. Hence, the installation and connection should be checked on site and check is there any arrester or attenuator used in the ALD line. Operation:
turn off M2000(LMT) DSP ANTCON SET ALDPWRSW
turn on with the properly threshold
DSP ANTCON
SET ALDPWRSW
SCN ALD ADD ALD
LST ALD DSP ALDVER-check alarm On-site Check the installation and connection of ALD line. Detail information can be found in the document .
2 ALD Maintenance Link Failure Alarm Reason: 2013-3-25
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1 There is no device installed in the ALD line; 2 Incorrect configuration; 3 Connection problem of the AISG cable(the blue line in the figure below), when the connection between RCU and TMA is wrong, the current will lower about 60mA than other sector, and the RCU can not be scanned. A example is shown in the attachment “Example”
Antenna R R C C
U
ANT0
Feeder & Jumper
ANT1
TMA NodeB0
N0B
N0A
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RET
AISG cable
NodeB1
N1B
RFU
N1A
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The confused connection of feeders or jumpers. As the figure below, the jumper
of sector3 has be connected to the TMA of sector1. So, even there is no the alarm of “RF Unit ALD Current Out of Range”, the problem is caused by wrong installation. To judge this situation, we can turn off the dc supply in the alarm port ,then if the current of another port in other sectors increase, that means the two ports in different sectors are connected to one TMA. (See attachment “Example2”)
Solution:
1 Conform the ALD network and installation status, avoid to add the device which do not exist; 2013-3-25
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2 Configure the device in right way; 3 Check the AISG connection between RCU and TMA. 4 Check the tag of jumpers, clear up all the jumpers and their mark. Confirm the each jumpers is installed in the right ports (may need to check the jumper’s actual connection with hand from end to end.) Operation:
Conform the ALD network and installation status
2 Configure the device following the < NodeB-R12-ALD System Configuration Guide > and < NodeB-R13-ALD System Configuration Guide >. Remark Sometimes the situation “Execution timed out” is also caused by Incorrect configuration, so, re-configure following the guide will solve the problem. 3 If the sector’s current is lower about 60mA than other sector’s, and the RCU can not be scanned. Re-connect the AISG cable between RCU and TMA. 4 Check the tag of jumpers, clear up all the jumpers and their mark. Confirm the each jumper is installed in the right ports (may need to check the jumper’s actual connection with hand from end to end).If still not work, remake all tags of jumpers.
3 RET Antenna Not Calibrated
RET Antenna Motor
Fault Alarm Reason:
The wrong configuration data file; Connection or Installation problem Solution:
Re-load the configuration data file to match the antenna model and then calibrate; if 2013-3-25
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not work, check the installation of RCU. Operation:
1
Confirm the antenna model and frequency band;
2
M2000(LMT)
DSP ALDVER DLD ALDCFG
configuration data file
Re-load the
CLB ANT SET ANTTITL DSP ANTTITL
check alarm 3
On-site
a Check if the installation of RCU is loose or distorted. b Remove the RCU and install again, then calibrate; c Swap the RCUs in faulty sector and normal sector,
calibrate the both sectors.
4 RET Antenna Running Data and Configuration Mismatch Alarm Reason:
RCU configured tilt is different with the current tilt. %%DSP ANTTILT: OPMODE=NAME;%% RETCODE = 0
Succeed.
Antenna Tilt -----------evice Name
=
HJZ843-N2A
Site No.
=
0
Sector No.
=
1
Cabinet No.
=
0
Subrack No.
=
4
=
N2A
Antenna Connector No. Device Type
=
SINGLE_RET
Configured Tilt(0.1 degree)
=
40
Current Tilt(0.1 degree)
=
20
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Solution:
Operate the command to calibrate RET and then set the tilt as the configured tilt. Operation:
DSP ANTTILT DSP ANTCON CLB ANT SET ANTTITL Check alarm
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