USER MANUAL FOR MBDA-80
ENU STATUS : 1-0-0
Copyright - refer to title page
Page 48
6 MAINTENANCE
The mBDA is designed for trouble-free operation and generally does not need maintenance. Maintenance
activities should only be carried out by trained personnel.
The equipment operation status can be observed remotely through OMC.
Periodic inspection of the repeater equipment(s) is recommended, the recommended tasks includes:
Inspect and record operation status and output power of the repeater from OMC or OMT.
Verify the direction and position of antennas. Re-align if necessary.
Make sure the cable gland and sealing on the RF cable connectors are not damaged.
Verify lightning and grounding protection is in good condition.
6.1 ALARMS
Table 7: Monitoring Unit Alarm List
Alarm List
Alarm Condition
RF Unit Alarm
Alarm when any RF unit is alarm, otherwise normal;
Alarm judgment period: Immediately;
Ext Alarm
Alarm status when the external terminals have the same H/L level with alarm
level, otherwise normal;
Alarm period: 10s by default.
Fan Alarm
Alarm when the Fan has broken, otherwise normal;
Fan2 is close to MCU.
Another one is Fan1;
Alarm period: 10s by default.
Over-Temperature
Alarm
Alarm when equipment temperature is higher than the threshold, otherwise
normal;
Alarm judgment period: 3 minutes by default;
Alarm threshold : 80
℃
by default.
Table 8: RF Unit Alarm List
Alarm List
Alarm Condition
Over DL P_in
Alarm
Alarm when DL input power is higher than the threshold, otherwise normal;
Alarm judgment period: 3 minutes by default;
Alarm threshold: -30dBm by default.
PLL Alarm
Alarm when PLL circuit is broken, otherwise normal;
Alarm judgment period: 3 minutes by default;
LNA Alarm
Alarm When LNA is broken, otherwise normal;
Alarm judgment period: 3 minutes by default;
DL PA Alarm
Alarm when PA Over-temperature Alarm, PA DL output power overload
Alarm, Reflection Power Alarm happens, otherwise normal;
Alarm judgment period: 3 minutes by default.
VSWR Alarm
Alarm when the DL reflection power is higher than the threshold, otherwise
normal;
Alarm judgment period: 3 minutes by default;
Alarm threshold: 2.0 by default.
Protection Shut
Alarm
Alarm when the PA status is off itself, otherwise normal;
Alarm judgment period: 10s by default.
