The Yokogawa AQ1205E is a handheld Optical Time Domain Reflectometer (OTDR) designed for installation, commissioning, and maintenance of single-mode fiber networks. Operating across three wavelengths—1310 nm, 1550 nm, and 1625 nm—this compact instrument delivers dynamic range up to 40 dB and 0.75 m event resolution, enabling precise fault location and attenuation measurements on both dark fiber and live PON systems. The 1625 nm port includes a built-in cutoff filter, permitting non-disruptive testing on in-service networks. Weighing approximately 1 kg with A5-size form factor, the AQ1205E integrates OTDR measurement with optional light source, power meter, fault locator, and fiber inspection capabilities. Field measurements can be logged to internal or USB storage and exported as CSV reports.
Technical Specifications
• Wavelengths: 1310 nm (±25 nm), 1550 nm (±25 nm), 1625 nm (±10 nm or ±25 nm)
• Fiber Type: Single-mode (ITU-T G.652)
• Dynamic Range: 40 dB typical at 1310 nm; 38 dB typical at 1550 nm; 33–36 dB at 1625 nm (guaranteed)
• Event Dead Zone: 0.75 m typical
• Attenuation Dead Zone: 4–5 m typical
• Spatial Resolution: 0.75 m
• 1625 nm Cutoff Filter: Integrated for live-network operation
• PON Measurement Mode: Optimized for splitter networks with controlled undershoot
– Key Features
• Tri-wavelength capability for installation and maintenance workflows
• High-resolution measurement distinguishing closely-spaced connectors
• Wide dynamic range accommodating long spans and high-loss PON architectures
• Built-in 1625 nm filter enabling testing on active signals
• Compact, portable design approximately A5 size, ~1 kg
• Optional modules: light source, optical power meter (standard/PON/high-power variants), automatic loss measurement, multi-fiber loss measurement, visible light source, fault locator, IP test, fiber inspection probe
• USB Type B and optional Ethernet connectivity
• CSV data export
– Typical Applications
• Single-mode fiber installation and acceptance testing
• PON network commissioning and troubleshooting
• Live-network maintenance via 1625 nm wavelength
• Fault localization and splice-loss characterization
• Long-distance span verification
– Compatibility & Integration
• Conforms to ITU-T G.652 single-mode fiber specifications
• USB and optional Ethernet interfaces for data transfer and remote operation
