The Yokogawa AQ7283H is a modular Optical Time Domain Reflectometer (OTDR) engineered for single-mode fiber characterization and network diagnostics across three wavelengths: 1310 nm ±25 nm, 1550 nm ±25 nm, and 1625 nm ±25 nm. The unit delivers dynamic range performance of 42 dB at 1310 nm, 40 dB at 1550 nm, and 39 dB at 1625 nm, with event dead zone of 0.6 m and attenuation dead zones ranging from 3.5 m to 4 m depending on wavelength. Measurement capabilities extend to 512 km with 2 cm minimum sampling resolution. The 8.4-inch color TFT LCD display (800 × 600 resolution) with multi-touch interface enables dual-mode operation via touchscreen and hard-key controls. Battery runtime reaches 15 hours under Telcordia standards or 10 hours during continuous measurement.
Technical Specifications
• Wavelengths: 1310 nm ±25 nm, 1550 nm ±25 nm, 1625 nm ±25 nm
• Dynamic Range (typical): 1310 nm = 42 dB | 1550 nm = 40 dB | 1625 nm = 39 dB
• Event Dead Zone: 0.6 m
• Attenuation Dead Zone: 3.5 m (1310 nm), 4 m (1550 nm), 4 m (1625 nm)
• Maximum Distance Range: 512 km
• Minimum Sampling Resolution: 2 cm
• Display: 8.4-inch color TFT LCD, 800 × 600, multi-touch capacitive
• Startup Time: <10 seconds
• Battery Life: Up to 15 hours (Telcordia standard) or 10 hours (continuous measurement)
• Measurement Update Rate: Up to 5 times per second
• Connectivity: USB (2 × Type-A, 1 × Mini-B), SD card slot, Ethernet (optional), wireless
– Key Features
• Fault location with 0.6 m event resolution
• Fiber length, attenuation, and splice loss measurement
• Smart Mapper Function with automatic PASS/FAIL judgment
• Macro bend detection for CWDM transmission validation
• PON characterization supporting splitter configurations up to 1×128
• Live-line maintenance capability via dedicated 1625 nm or 1650 nm port with integrated cut filter
• Schedule Measurement function for periodic fiber core monitoring
• Multi-tasking architecture enabling simultaneous OTDR and power-level operations
– Typical Applications
• Single-mode fiber network installation and commissioning
• Fault isolation and span characterization in operational systems
• PON deployment validation and troubleshooting
• CWDM system path verification
• Long-haul terrestrial and submarine fiber diagnostics
– Compatibility & Integration
Data storage via internal memory, USB, and SD card. Optional Ethernet and wireless connectivity support field-based data acquisition and remote monitoring workflows.
