Avitec AB FD-3100A ユーザーズマニュアル

 

 
Alarms Probable 

Action*

 

Node Function 

1.    Remote Transceiver Downlink Tx 

amplifier chain failure 

2.    Pilot tone oscillator malfunction 
3.  Pilot tone detector malfunction 

1.  If Remote Transceiver Rcvd 

Opt Pwr LED is OFF, this 
indicates downlink amplifier 
chain failure: replace Remote 
Transceiver. 

2.    Repair/replace failed Plug-In 
3.  Repair/replace failed Plug-In 

1.  Node Function 
2.  Received Opt Pwr 
Low (Remote 
Transceiver) 

1.  Problem in downlink fiber path: 

optical loss too high: fiber run is 
too long, connector not seated 
properly, damaged or in need of 
cleaning, damaged splice 

2.  Remote Transceiver photodiode 

failure 

1.  Check Rcvd Optical 

Power LED at Remote 
Transceiver. If active 
(Yellow), disconnect 
downlink fiber and 
check optical output 
with light sensitive card. 
If no light detected, 
inspect fiber path, esp. 
any connector recently 
disconnected. Inspect for 
proper seating. Clean 
connectors. If necessary, 
disconnect fiber from 
FiberDASand check 
fiber path with OTDR to 
locate problem.  

2.  If fiber is OK, indicates 

Remote Transceiver 
photodiode failure: 
replace Remote 
Transceiver. 

 
 

1.  Node Function 
2.  Received Opt Pwr 
Low (Plug-In) 

1.  Remote Transceiver laser failure 
2.  Problem in uplink fiber path: 

optical loss too high: fiber run is 
too long, connector not seated 
properly, damaged or in need of 
cleaning, damaged splice 

3.  Plug-In photodiode failure 

1.  Check Laser Alarm in 

Remote Transceiver. If 
active (Red), replace 
Remote Power Supply.  

2.  If not, inspect fiber path, 

esp. any connector 
recently disconnected. 
Inspect for proper 
seating. Clean 
connectors. If necessary, 
disconnect fiber from 
FiberDASand check 
fiber path with OTDR to 
locate problem. 

3. Replace 

Plug-In 

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