2000m OTDR Fiber Ring Launch Cable Box – Dead Zone Eliminator, G652D, SC FC LC ST UPC APC

2000m OTDR Fiber Ring Launch Cable Box – Dead Zone Eliminator for Long-Haul Near-End Fiber Testing | G652D | SC / FC / LC / ST | UPC & APC The 2000m OTDR Fiber Ring Launch Cable Bo x is a field-ready fiber optic launch cable assembly containing 2,000 meters of G652D singlemode fiber wound on a compact fiber ring spool inside a ruggedized, IP54-rated hard-shell case. It connects between the OTDR and the fiber link under test to eliminate the OTDR’s near-end dead zone, enabling accurate measurement of insertion loss and reflectance at the first connector of the link — measurements that would otherwise be masked by the OTDR’s launch pulse recovery time. Available with SC, FC, LC, and ST connectors in both UPC and APC polish, the 2000m fiber ring launch cable box provides the maximum dead zone coverage in the OTDR launch cable range — recommended for OTDRs operating at long pulse widths (>1µs) for long-haul singlemode fiber testing, and for applications where the near-end connector of the link must be accurately characterized regardless of OTDR model or pulse width setting. What Is an OTDR Launch Cable Box and Why Is 2000m Needed? Every OTDR has a dead zone at the beginning of a trace — a blind region caused by the recovery time of the OTDR’s receiver after the high-power launch pulse. During this dead zone, the OTDR cannot accurately measure events (connectors, splices, faults) on the fiber. The dead zone has two components: Event Dead Zone (EDZ): The minimum distance after a reflective event before the OTDR can detect another event — typically 1–5 meters for modern OTDRs Attenuation Dead Zone (ADZ): The minimum distance after a reflective event before the OTDR can accurately measure loss — typically 10–100+ meters depending on OTDR model and pulse width setting By inserting a 2000m launch cable between the OTDR and the link under test, the OTDR’s dead zone is pushed 2,000 meters into the launch cable — well before the first connector of the actual link. A 2000m launch cable is the recommended choice for OTDRs using long pulse widths (>1µs) where the ADZ can extend to several hundred meters. Key Features 2,000m G652D Singlemode Fiber: ITU-T G652.D compliant singlemode fiber — low attenuation ( Show more