ALM-2278 CDU Diversity RX LNA Alarm

Description

This alarm is triggered when the CDU detects that the bias current of the low noise amplifier (LNA) configured for the diversity receive path is beyond the normal range.

Attribute

Alarm ID Alarm Severity Alarm Type
2278 Minor Fault

Parameters

ID Name Meaning
1 Site No.

Number of the site where the faulty board or module is located

Value range: 0-2047

2 Board Type

Number of the type which the faulty board belongs to.

C7:P-CDU

C9:D-CDU

3 Board No.

Number of the fault board

0:CDU 0

1:CDU 1

4 PassNo

Number of the passage where the faulty board is located.

5 SubLink No.

Alarm sub-category number

255:None

6 Cell Index

Index of the cell where the board or module is located

0-2047: Cell index of the faulty cell in the data configuration

65535: None

7 Site Type

Type of the site where the faulty board or module is located

3: BTS30

5: BTS312

10: BTS3012A

11: BTS3006A

8 RackNo

Number of the rack where the faulty board is located.

9 BoxNo

Number of the subrack where the faulty board is located.

10 SlotNo

Number of the slot where the faulty board is located.

11 Site Name

Site Name

12 Alarm Attribute

Alarm Character

0:Normal

1:Transient Count

Impact on the System

This alarm shows that the LNA configured for the diversity receive path of the CDU cannot work normally. This will deteriorate the quality of the received signals on the diversity receive path of the BTS and lower the receive flexibility. Because the BTS is configured with a main receive path, the BTS can still work normally except that the receive flexibility of the BTS slightly decreases.

System Actions

None.

Possible Causes

  • The LNA configured for the diversity receive path of the CDU cannot work normally.
  • The CDU alarm circuit is faulty (false alarm).

Procedure

  1. Replace the CDU and check whether the alarm is cleared.

    Y=> The alarm handling ends.

    N=> Huawei Customer Service Center.


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