Otdr Launch Cable Purpose

Using a shorter fiber launch cable may hide the first event within the fiber quickmap s dead zone.

Otdr launch cable purpose.

It is essential for testing optical fiber links in premises networks. The afl fr1 sm 150 sc alc fiber ring otdr launch cable features 150 meters of single mode fiber optic cable with sc and angled lc connectors in a portable and lightweight ring. Its purpose is to detect locate and measure elements at any location on a fiber optic link. Without a launch box it is difficult to measure the relative loss at the near end and far end of the patch panel connections.

Both a launch and receive cable are needed to measure complete link loss of a fiber with an otdr. Otdrs are always used with a launch cable and may use a receive cable. During a test the launch box is placed between the otdr and the near end of a patch panel. When testing fiber optic cable with an optical time domain reflectometer otdr these launch boxes eliminate the dead zone.

Otdr testing requires launch and receive test cables to measure the end. Attenuation and event deadzones explained make sure that the otdr launch fiber used is of the same core diameter and connector type as the fiber link under test. Otdr launch box is like fiber optic cables it has different types. This launch cable connects otdr to ftth or any network using apc connections.

However the handling of them should be careful. If you don t use a launch cable otdr bulkhead event not seen fiber under test end of fut reflective event with loss can t see end of fut using a 5ns pw using a 1us pw wider pulse width used but this results in the deadzone getting longer. Noyes fiber rings from afl are a necessity when testing with an otdr. Measurement using a launch cable launch cable launch cable otdr 1m patchcord.

Dead zones can be overcome by connecting a long launch cable to the otdr. Because very long test cables are impractical to transport and use noyes designed coiled lengths of 50 µm multimode 62 5 µm multimode or single mode fiber conveniently packaged in compact rings. The using of otdr launch boxes seems really easy. It functions by launching pulses of light into the optical fiber and measuring the back reflections created by the faults splices and bends.

Ftb ltc psb spsb launch test cable pulse suppressor box. An optical time domain reflectometer otdr is an optical measurement instrument designed to detect faults splices and bends in optical fiber cables. Used in conjunction with an otdr the ftb ltc psb spsb covers the otdr s dead zone enabling loss measurement on the first and last connections of a fiber under test.