Otdr Testing Launch Cable Length

For very long haul 4000 m of cable may be used.

Otdr testing launch cable length.

The launch fiber cable helps to negate blind spots or the dead zones of an otdr which occures when there is high launch power or faults near the. The chosen launch test cable should therefore be longer than the pulse dead zone used for the tests. The length of the launch and receive cables depends on the link being tested generally between 300 m and 500 m for multimode testing and between 1000 m and 2000 m for single mode testing. For instance a 1 µs pulse is approximately 100 m long.

What is a launch cable used for. Available in 160m 525 length 50 µm or 62 5 µm multimode and 9 µm single mode fiber optic cable options. Typically the length of an otdr s dead zone is equivalent to that of the optical pulse plus a few meters. This help to avoid variations in loss and distance measurements when testing.

The otdr is also commonly used to create a picture of fiber optic cable when it is newly installed. Selecting a 150 m spsb or a 300 m ltc psb would therefore be appropriate. It can verify splice loss measure length and find faults. Otdr testing with launch cable.

Measurement using a launch cable launch cable launch cable otdr 1m patchcord bulkhead reflective event with loss fiber under test start of fut end of fut end of launch cable these reflections will be small if the connectors are clean in good condition clean protect the launch cable connectors 1m patchcord. Fiber ring otdr launch cable connects the otdr to the link under test and relays insertion loss and reflectance of the near end connection. The optical time domain reflectometer otdr is useful for testing the integrity of fiber optic cables. The optical time domain reflectometer otdr is an essential tool.