ALM-13324 GPS Satellite Signals Lost Alarm

Description

When GPS receiver can not receive the GPS satellite signal, the alarm occurs.

Attribute

Alarm ID	Alarm Severity	Alarm Type
13324	Warning	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. 105:USCU
3	Board No.	Number of the fault board 0-4:USCU
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 is located. 17:DBS3900 GSM; 18:BTS3900 GSM; 19:BTS3900A GSM; 20:DBS3036; 21:BTS3036; 22:BTS3036A;
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

The GPS receiver cannot locate the satellite.

System Actions

None.

Possible Causes

The GPS signals may be temporarily lost due to environmental factors, such as barriers or weather conditions. Generally, the GPS signals can be restored after the environmental factors are eliminated.

Procedure

Check for ALM-13326 GPS Antenna Fault Alarm.
Y => ALM-13326 GPS Antenna Fault Alarm is generated. Clear the alarm according to related alarm handling suggestions.

N => ALM-13326 GPS Antenna Fault Alarm is not generated. Go to procedure 2.
Check the GPS antenna.
1. Check whether the GPS antenna is shielded by barriers.
  Y => The GPS antenna is shielded by barriers. Go to step b.
  
  N => The GPS antenna is not shielded by barriers. Go to procedure 3.
2. Remove the barriers. Check whether the alarm is cleared.
  Y => The alarm is cleared. No further action is required.
  
  N => The alarm is not cleared. Go to procedure 3.
Check the USCU.
Reset the USCU. Check whether the alarm is cleared.

Y => The alarm is cleared. No further action is required.

N => The alarm is not cleared. Go to procedure 4.
Replace the USCU. Check whether the alarm is cleared.
Y => The alarm is cleared. No further action is required.

N => The alarm is not cleared. Go to procedure 5.
Replace the GPS antenna. Check whether the alarm is cleared.
Y => The alarm is cleared. No further action is required.

N => The alarm is not cleared. Contact Huawei.