Error
MTS base station BRs report RX1 path alarm in Full Vision
No RX2 or RX3 path alarms being reported
RX1 path alarm continues to be reported when duplexer 01 connected to another antenna
When RX cables swapped over (RX1 to RX2) on the BR the alarm followed the cable so RX2 path alarms occurred
Environment
Dimetra
IP Compact
MTS
Root Cause
Duplexer connected to RX1 antenna port was faulty
Workaround/Fix
Workaround:
Disable RX1 path on each BR using BRC MMI command 'set nvm_param rx1 rx_fru_config x' where x = value of RX branches to be enabled apart from RX1.
x =
● 1 – Receiver branch 1 enabled
● 2 – Receiver branch 2 enabled
● 3 – Receiver branches 1, and 2 enabled
● 4 – Receiver branch 3 enabled
● 5 – Receiver branches 1, and 3 enabled
● 6 – Receiver branches 2, and 3 enabled
● 7 – Receiver branches 1, 2, and 3 enabled
Fix:
Replace duplexer