Exfo FTB-7503B OTDR Module 1550nM

The Exfo FTB-7503B is a 1550 nm OTDR module engineered for long-haul fiber optic network characterization and fault detection. Operating as an interchangeable component within EXFO’s FTB test platforms, it delivers ultra-long-range measurements to 260 km with fast acquisition and precise event localization. The module combines high dynamic range performance with field-portable deployment capability, making it ideal for long-distance link commissioning and troubleshooting across carrier and enterprise networks. ## Technical Specifications • **Wavelength:** 1550 nm
• **Maximum Range:** 260 km
• **Dynamic Range:** Up to 45 dB (44 dB at 10 µs pulse width, 45.5 dB at 20 µs pulse width for FTB-7503B-B-ER configuration)
• **Maximum Pulse Width:** 20 µs
• **Event Dead Zone:** 3 m
• **Attenuation Dead Zone:** 15 m
• **Sampling Resolution:** 4 cm minimum; up to 256,000 sampling points
• **Linearity:** ±0.03 dB/dB
• **Acquisition Time:** 7 seconds startup; 90% maximum dynamic range achieved in under 30 seconds
• **Fiber Type:** Single-mode (9/125 µm)
• **Connector:** EXFO Universal Interface (EUI); compatible with UPC and APC connectors ## Key Features • Ultra-long-haul testing optimized for links exceeding 200 km
• High-resolution event detection and characterization of splices, connectors, splitters, and breaks
• Fast trace acquisition for field efficiency
• Field-interchangeable module design
• Visual Fault Locator (VFL) option available
• ToolBox OTDR software for data acquisition and reporting
• Automatic and advanced measurement modes ## Typical Applications • Long-haul terrestrial fiber link testing and commissioning
• Fault location and cable break detection
• Splice and connector loss characterization
• LAN/WAN and metro network troubleshooting ## Compatibility & Integration The FTB-7503B integrates with EXFO FTB series platforms including the FTB-400 Universal Test System, FTB-100B Mini-OTDR, FTB-200 Compact Platform, and FTB-500 Platform.