最近處理故障小區(qū)時發(fā)現(xiàn)一小區(qū)的載波起不來，用RXASP查看有LOOP TEST FAILED,如下：
MO SCGRSC RSITEALARM SITUATION
RXOTG-234 DC3941
RXOCF-234 DC3941 BTS INT UNAFFECTED
RXOTS-234-4-7 DC3941 LOOP TEST FAILED
RXOTS-234-5-0 DC3941 LOOP TEST FAILED
RXOTS-234-5-1 DC3941 LOOP TEST FAILED
RXOTS-234-5-2 DC3941 LOOP TEST FAILED
RXOTS-234-5-3 DC3941 LOOP TEST FAILED
RXOTS-234-5-4 DC3941 LOOP TEST FAILED
RXOTS-234-5-5 DC3941 LOOP TEST FAILED
RXOTS-234-5-6 DC3941 LOOP TEST FAILED
RXOTS-234-5-7 DC3941 LOOP TEST FAILED
用RXMFP查看無告警，傳輸無閃斷誤碼，用RXAPP查看傳輸時隙如下：
DEVDCPAPUSAGEAPSTATE64KTEI
RBLT2-7489 1UNCONCSPEECH/DATA YES
RBLT2-7490 2UNCONCSPEECH/DATA YES
RBLT2-7491 3UNCONCSPEECH/DATA YES
RBLT2-7492 4UNCONCSPEECH/DATA YES
RBLT2-7493 5UNCONCSPEECH/DATA YES
RBLT2-7494 6UNCONCSPEECH/DATA YES
RBLT2-7495 7UNDEF IDLENO
RBLT2-7496 8UNCONCSPEECH/DATA YES
RBLT2-7497 9UNCONCSPEECH/DATA YES
RBLT2-749810UNCONCSPEECH/DATA YES
RBLT2-749911UNCONCSPEECH/DATA YES
RBLT2-750012UNCONCSPEECH/DATA YES
RBLT2-750113UNCONCCF/TRXC SIGNAL NO620
RBLT2-750214UNCONCSPEECH/DATA YES
RBLT2-750315MPLEX16SPEECH/DATA NO
MPLEX16SPEECH/DATA NO
MPLEX16SPEECH/DATA NO
MPLEX16SPEECH/DATA NO
RBLT2-750416UNCONCTRXC SIGNAL NO 2
RBLT2-750517UNCONCTRXC SIGNAL NO 5
RBLT2-750618UNCONCTRXC SIGNAL NO 4
RBLT2-751319UNDEF IDLENO
RBLT2-751420UNDEF IDLENO
RBLT2-751521UNDEF IDLENO
RBLT2-751622UNDEF IDLENO
RBLT2-751723UNDEF IDLENO
RBLT2-751824UNDEF IDLENO
RBLT2-751925UNDEF IDLENO
請問各位高手是什么原因？