IC693MDL732
IC693MDL732
IC693MDL732
OTDR常見(jiàn)測(cè)試曲線
1、正常曲線
一般為正常曲線圖, A 為盲區(qū), B 為測(cè)試末端反射峰。測(cè)試曲線為傾斜的,隨著距離的曾長(zhǎng),總損耗會(huì)越來(lái)越大。用總損耗( dB )除以總距離( Km )就是該段纖芯的平均損耗( dB/Km )。
2 、光纖存在跳接點(diǎn)
中間多了一個(gè)反射峰,因?yàn)楹苡锌赡苤虚g是一個(gè)跳接點(diǎn)。例如:海豐至博美的 ECI 纖芯,因?yàn)椴┟罌](méi)有ECI 設(shè)備, ECI 的在用纖芯要從博美站跳接過(guò)去到普寧,所以在博美用根尾纖把海豐、普寧方向連接起來(lái),所以在測(cè)試這樣的纖芯時(shí),就會(huì)出現(xiàn)像圖中這樣的曲線圖。當(dāng)然也會(huì)有例外的情況,總之,能夠出現(xiàn)反射峰,很多情況是因?yàn)槟┒说墓饫w端面是平整光滑的。端面越平整,反射峰越高。例如在一次中斷割接當(dāng)中,當(dāng)光纜砍斷以后,測(cè)試的曲線應(yīng)該如光路存在斷點(diǎn)圖所示,但當(dāng)你再測(cè)試時(shí),在原來(lái)的斷點(diǎn)位置出現(xiàn)反射峰的話,那說(shuō)明現(xiàn)場(chǎng)的搶修人員很有可能已經(jīng)把該纖芯的端面做好了。
【公 司】: 廈門泰尼電氣有限公司
【主 營(yíng)】: AB、GE、施耐德等各類PLC產(chǎn)品
【價(jià) 格】: 電議
【發(fā)布人】: 張亮
【電 話】: 18030028083
【所在地】: 福建 - 廈門
【座 機(jī)】: 0592-6809819
【來(lái) 源】: 供應(yīng)信息 > 電工、電氣 > PLC
【Q Q】: 2314094943
3 、異常情況
出現(xiàn)圖中這種情況,有可能是儀表的尾纖沒(méi)有插好,或者光脈沖根本打不出去,再有就是斷點(diǎn)位置比較進(jìn),所使用的距離、脈沖設(shè)置又比較大,看起來(lái)就像光沒(méi)有打出去一樣。出現(xiàn)這種情況, 1 要檢查尾纖連接情況, 2 就是把 OTDR 的設(shè)置改一下,把距離、脈沖調(diào)到最小,如果還是這種情況的話,可以判斷
1 尾纖有問(wèn)題, 2 OTDR 上的識(shí)配器問(wèn)題, 3 斷點(diǎn)十分近, OTDR 不足以測(cè)試出距離來(lái)。如果是尾纖問(wèn)題,只要換一根尾纖就知道,不行的話就要試著擦洗識(shí)配器,或就近查看纖芯了。ABB 3HAB6182-1 CPU BOARD DSQC-335 3HAB61821 NEW
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