IC693MDL740
IC693MDL740IC693MDL740
OTDR測試與誤差分析
OTDR是光纜工程施工和光纜線路維護工作中最重要的測試儀器,它能將長100多公里光纖的完好情況和故障狀態(tài),以一定斜率直線(曲線)的形式清晰的顯示在幾英寸的液晶屏上。根據(jù)事件表的數(shù)據(jù),能迅速的查找確定故障點的位置和判斷障礙的性質及類別,對分析光纖的主要特性參數(shù)能提供準確的數(shù)據(jù)。OTDR主要是根據(jù)光學原理以及瑞利散射和菲涅爾反射理論制成的。儀表的激光源發(fā)出一定強度和波長的光束至被測光纖,由于光纖本身的缺陷,制作工藝和石英玻璃材料組分的不均勻性,使光在光纖中傳輸將產生瑞利散射;由于機械連接和斷裂等原因將造成光在光纖中產生菲涅爾反射,由光纖沿線各點反射回的微弱的光信號經光定向耦合器到儀器的接收端,通過光電轉換器,低噪聲放大器,數(shù)字圖象信號處理等過程,實現(xiàn)圖表、曲線掃跡在屏幕上顯現(xiàn)。目前OTDR型號種類繁多,操作方式也各不相同,但其工作原理是一致的。在光纖線路的測試中,應盡量保持使用同一塊儀表進行某條線路的測試,各次測試時主要參數(shù)值的設置也應保持一致,這樣可以減少測試誤差,便于和上次的測試結果比較。即使使用不同型號的儀表進行測試,只要其動態(tài)范圍能達到要求,折射率、波長、脈寬、距離、均化時間等參數(shù)的設置亦和上一次的相同,這樣測試數(shù)據(jù)一般不會有大的差別。
【公 司】: 廈門泰尼電氣有限公司
【主 營】: AB、GE、施耐德等各類PLC產品
【價 格】: 電議
【發(fā)布人】: 張亮
【電 話】: 18030028083
【所在地】: 福建 - 廈門
【座 機】: 0592-6809819
【來 源】: 供應信息 > 電工、電氣 > PLC
【Q Q】: 2314094943
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ABB DSQC-239 I/O BOARD REMOTE, tested, warranty
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ABB DSQC315 / 3HAB2214-1/2 CARD
ABB DSQC224 YB560103BE SERVO ROBOT I/O YB560103BE /2
ABB DSQC 2498 3HAA3562-ANA/1 POWER SUPPLY - AXIS DRIVES
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ABB DSQC230 YB560103-BN/2 YB560103BN/2 ROBOT
ABB DSQC 252 Safety Board ABB3HAA 3563-ALG/2 DSQC252
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ABB MODEL YB560103-BD/4 DIGITAL I/O BOARD DSQC223 NEW
ABB DSQC-239 YB560103-CH/10 REMOTE I/O BOARD DSQC239
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ABB AB DSQC 325 DSQC325 3HAB2241-1 3BSC980006R165 MV-1
ABB YB560103-BD S3/S4 DSQC223 DIGITAL I/O BOARD
ABB AB DSQC 325 DSQC325 3HAB2241-1 MV-1 Plastic Chipped
ABB Robot DSQC 325 Main Computer Board 3 HAB 2241-1 S4
ABB DSQC 236G YB560103-CD/26 AXIS DRIVE BOARD REMANNED
ABB DSQC 266G 3HAB8801-1/2B ROBOT CONTROL BOARD NEW
ABB DSQC 253 PLC Board 3HNE 01695-1 3E 042808
ABB / Finlandia DSQC 258 P/N: 3HAAA3563-AUA/1
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ABB DSQC 236C System Control Drive Unit DSQC236C