500m OTDR Fiber Ring Dead Zone Eliminator – OTDR Launch Cable Box, G652D, SC FC LC ST UPC APC

500m OTDR Fiber Ring Dead Zone Eliminator – OTDR Launch Cable Box | G652D | SC / FC / LC / ST | UPC & APC The 500m OTDR Fiber Ring Dead Zone Eliminator is a compact fiber optic lau nch cable assembly — also known as an OTDR pulse suppressor, OTDR delay line box, or OTDR launch cable box — containing 500 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. The fiber ring format winds the fiber in a compact ring configuration inside the case, minimizing the overall footprint while maintaining the full 500m of launch fiber needed to push the OTDR’s dead zone away from the beginning of the link under test. Available with SC, FC, LC, and ST connectors in both UPC and APC polish. What Is an OTDR Dead Zone Eliminator? An OTDR dead zone eliminator (also called an OTDR launch cable box, OTDR pulse suppressor, or OTDR delay line) solves one of the most fundamental limitations of OTDR testing: the near-end dead zone. Every OTDR has a blind region at the beginning of its trace caused by the recovery time of the receiver after the high-power launch pulse. During this dead zone, the OTDR cannot accurately measure events 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 10–80 meters at short pulse widths By inserting this 500m fiber ring between the OTDR and the link under test, the dead zone is pushed 500 meters into the launch fiber — well before the first connector of the actual link — allowing the OTDR to accurately measure near-end connector loss, first splice loss, and faults near the launch end of the fiber. Key Features 500m G652D Singlemode Fiber: ITU-T G652.D compliant singlemode fiber — the standard fiber type for FTTH, telecom OSP, and long-haul applications Compact Fiber Ring Design: Fiber is wound in a compact ring configuration inside the case — minimizes footprint while accommodating 500m of launch fiber. More portable than traditional drum-wound launch cables Non-Metal Construction: SR Polypropylene case will not dent, corrode, or conduct electricity — safe for use in all field environments including near energized equipment IP54 Ruggedized Hard-Shell Case: Water and dust resistant — suitable for indoor and outdoor use across a wide temperature range (-40°C to +85°C) Compound Latch with Locking Feature: Positive seal for secure closure in field environments, with easy one-hand opening Auto-Purge Valve: Prevents pressure buildup inside the sealed case during altitude and temperature changes — maintains case integrity in outdoor and aerial environments Robust Carabiner Clip: Clip to a belt, ladder, or equipment rack during testing — keeps both hands free SC / FC / LC / ST Connectors, UPC & APC: Available in the most common singlemode connector types and polish types 2-Meter Lead Cables: 3mm buffer lead cables on both ends for strain relief and easy connection Multi-Purpose: Functions as OTDR pulse suppressor, launch box, delay line, and receive cable for installation, testing, training, and calibration applications Fiber & Connector Specifications Parameter Specification Fiber Types G652D, G657A, OM1, OM3, OM4 Fiber Length 500m Lead Length 2 meters, 3mm buffer Typical Loss Show more