常见告警处理流程

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1

DECEMBER

2004常见报警信息及处理MOTOROLACONFIDENTIALPROPRIETARY,

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2002.DRI

ALARM73/7886，87，9192150234，23524321，29，37，74192，193AlarmBTSCOECHINA

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2002.

Motorola的基站系统有一套完善的报警机制，充分利用报警信息，可有效地提高系统维护效率。

检查实时Alarm:通过在H2SC上执行disp_act_alarm

<site

#>发现该site此时正在发生的Alarm信息。Sample自动显示实时alarm信息

alarm_mode<site#>on

检查某个载频的alarm历史信息。通过在H2SC上执行如下命令进入Emon模式（Ctrl+N）Rlogin

<subsystem#><CPU#>TCU_Alarm_Read

All返回H2SC

emon

(Ctrl+D)返回H2SC

MMI（Ctrl+N）Sample1

Sample2DRI

73

&

DRI

78及其产生机理VSWR及其衡量标准BTS发射通路连接图告警处理流程BTSCOECHINA

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2002.DRI

73

&

DRI

78及其产生机理BTSCOECHINA

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2002.

DRI

78发射天线驻波比过高：DUP内置电路检测7/16”射频头处的发射/反射功率，没有信号发射时不检测，接收天线不检测。过高的VSWR将导致小区覆盖半径缩小、掉话率过高。

DRI

73反射功率过高：发射通路发生严重故障将导致此告警。过长时间的高反射将不可避免地损坏CTU，所以它的检测周期比DRI

78短。告警产生几秒钟后CTU将自动复位，所以处理故障时需要适当降低输出功率。VSWR及其衡量标准

驻波:当天线和CTU的阻抗完全匹配时，信号将最大化地被天线发射出去。通常是不可能做到完全匹配的，就产生了前向波和反向波，它们组合在一起就形成了驻波。

VSWR驻波比定义：驻波的最大电平和最小电平的比值，它的大小是从1：1到∞:1反射系数Γ

=

回波损耗

RL

=

,通常以dB表示，也可以作为衡量标准BTSCOECHINA

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2002.VSWR及其衡量标准1.13-1.38是VSWR衡量标准16-24dB是相应的RL衡量标准告警产生的判定标准是2.61的VSWR或7dB(+/-1dB)的RLBTSCOECHINA

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2002.DUP7/16”SMACTU2Horizon

II

BTS机柜N-型ANTRXTX天线馈线避雷器及阻抗变换机柜外射频通路天线射频尾线7/16”BTSCOECHINA

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2002.发射通路连接图故障处理流程BTSCOECHINA

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2002.必备工具：VSWR测量仪表合适的扭矩扳手笔记本及串口线50欧姆/50w的假负载故障处理流程BTSCOECHINA

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2002.误告警：由现场维护引起的告警，告警仅出现一次，出现时有

Door

Alarm告警。

短暂出现的告警，可能是由于遮挡物或遮挡信号引起的。

由于相邻的天线耦合过来过大的反射功率，这是由于天线安装不正确引起的，要保证1米的间隔。不要轻易更换CTU,通常VSWR告警并不是由它引起的。故障处理流程有DRI

78或DRI

73告警串接VSWR测量仪表在天馈线系统之前，反射功率是否过高？反射功率是否过高是直接将假负载连在DUP上，检查告警否更换

DUPVSWR告警检查SMA射频线、CTU2以及DUP的SMA连接头，必要时需更换无VSWR告警使用50欧姆的假负载代替天馈线是替换前一级部件否有VSWR或DRI

73告警检查天馈线系统及其连接，必要时需更换没有告警检查DUP的VSWR

DRI

78或DRI

73告警是否依然存在完成是否反射功率是否过高否检查天馈线系统及其连接，必要时需更换是把假负载连到前一级输出BTSCOECHINA

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2002.BTSCOECHINA

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2002.BTSCOECHINA

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2002.故障处理流程BTSCOECHINA

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2002.检查告警CTU2的反射功率：退服CTU2

串接VSWR测量仪表在DUP和天馈线系统之间，确保连接牢固CTU2以最大功率发射(ts

a

txp

00)读发射/反射功率，用alarm_card

cab察看告警

如果VSWR超出容限，alarm_card

cab命令显示tx

vswr为全1，按照定位VSWR故障步骤定位故障

如果VSWR没有超出容限，alarm_card

cab命令显示全1，检查DUP故障

如果VSWR没有超出容限，alarm_card

cab命令显示全0，但有DRI

73告警，可能是由其它原因导致的告警。alarm

card

cabBTSCOECHINA

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2002.故障处理流程BTSCOECHINA

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2002.定位VSWR故障：关闭CTU2的射频输出(ts

a

txp

0xff)断开户外天馈线系统，用假负载代替CTU2以最大功率发射(ts

a

txp

00)

检查VSWR,如果没有超出容限，可以断定是天馈线系统故障，通常是天线进水或密封不好如果超出容限，将假负载向前移一级

检查VSWR,如果超出容限，逐级向前移假负载直至定位出故障部件更换故障部件，做工不好的射频电缆是经常出故障部件。故障处理流程BTSCOECHINA

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2002.检查DCF/DDF的故障：关闭CTU2的射频输出(ts

a

txp

0xff)将假负载直接连在DUP输出端CTU2以最大功率发射(ts

a

txp

00)用alarm_card

cab命令检查告警

如果告警依然存在，更换DUP,否则可能是由其它原因引起的故障处理流程BTSCOECHINA

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2002.其他故障原因：关闭CTU2的射频输出(ts

a

txp

0xff)卸下SMA连接电缆，看是否有物理损坏CTU2或DUP的SMA接头是否有物理损坏输出端将假负载直接连在CTU2的射频输出端口CTU2以最大功率发射(ts

a

txp

00)由于DRI

73导致CTU2频繁重启，请更换CTUDRI

74

报警BTSCOECHINA

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2002.74报警：Cell

Tx

Pwr

Unachievable报警原因：BSC数据库参数max_tx_bts与收发器的TX

offset校准值不匹配。现象BTSCOECHINA

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2002.当出现74报警时，会导致DRI无法进入服务状态（B-U)：DRI

5

0

0DRI

5

1

0D-U

Cell

Tx

Pwr

Unachievable

22/07

16:17:08

NoneD-U

Cell

Tx

Pwr

Unachievable

22/07

16:17:11

None背景原因BTSCOECHINA

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2002.CTU2的发射功率由max_tx_bts与TX

offset值共同决定。CTU2的最大发射功率在single

mode下比doublemode要高。如果CTU2配置为double

mode,而TX

offset为在

single

mode下校准并保存的，就有可能出现所期望的发射功率大于CTU2在double

mode下所能达到的最大功率，因此产生报警。解决方案BTSCOECHINA

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2002.将max_tx_bts从0改变到2INS

DRI并在Double模式下重新校准根据小区规划，可将mat_tx_bts恢复到0DRI

86

,87,91

报警BTSCOECHINA

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2002.DRI

86报警：输出功率低DRI

87报警：输出功率过高当以上两个报警出现时，会导致DRI复位。如果在十分钟内连续出现三次，系统会使DRI退出服务。DRI

91报警：输出功率偏低，但可继续使用。现象当连续出现三次86，87告警时会导致DRI“Inhibit”BTSCOECHINA

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2002.DRI

0

0

0D-UINHIBITED20/03

07:09:19

NoneDRI

0

1

0B-UNO

REASON20/03

01:10:39

RTF

0

0

0解决方法BTSCOECHINA

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2002.请使用3.2Nm的螺丝刀拧紧PA底部的螺钉，以消除以上报警。确认系统所使软件为1670.20或之后版本。如以上措施不能消除该告警，则返修该CTU2DRI

92

AlarmBTSCOECHINA

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2002.

Power

Amplifier

Temperature

High

But

Functioning功放过热，但还可以工作。DRI

2

0

0

92

FMIC

Untagged

06-14-2022Power

Amplifier

Temperature14:55:08

High

But105

FMIC

Untagged

06-14-2022

Fan(CTU)FunctioningIAS

15

0

0Tray

2

Failure•14:56:28DRI

150BTSCOECHINA

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2002.

DRI

150告警为SURF告警，说明接收通路有问题。产生的原因可能为：CTU2RX接头与背板连接出现问题

SURF本身出现问题DRI

243

AlarmBTSCOECHINA

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2002.

所有转换到D-U：Inhibited状态的DRI都会使系统产生一个DRI

243告警，而不会产生其他相关的告警。

任何一个没有产生告警，而且不提供服务的DRI都会导致系统产生243告警。

CTU2中，如果其中一个DRI出现243告警，那么另一个DRI也将会受到影响。DRI

234/235

Alarm234.

DRI:

Active

Link

Connection

Failure235.

DRI:

Standby

Link

Connection

FailureBTSCOECHINA

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2004MOTOROLACONFIDENTIALPROPRIETARY,

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