The Yokogawa AQ1200A is a compact handheld Optical Time Domain Reflectometer (OTDR) for field installation, maintenance, and troubleshooting of single-mode fiber networks. Operating at 1310 nm and 1550 nm wavelengths, it delivers a dynamic range of 32 dB and 30 dB respectively, with exceptionally short event dead zone performance of ≤0.8 m. The instrument combines OTDR functionality with integrated light source and optical power meter capabilities, enabling comprehensive fiber characterization from 500 m to 200 km distance ranges with selectable pulse widths from 3 ns to 10 µs and sampling resolution down to 5 cm. Distance measurement accuracy is ±1 m plus 2×10⁻⁵ of measured distance, with loss measurement accuracy of ±0.05 dB under 1 dB conditions.
Technical Specifications
Optical Performance
• Wavelengths: 1310 nm and 1550 nm (±25 nm)
• Dynamic Range: 32 dB (1310 nm) / 30 dB (1550 nm)
• Event Dead Zone: ≤0.8 m
• Attenuation Dead Zone: 5 m typical
• Distance Range: 500 m to 200 km with nine selectable range modes
• Pulse Width: 3 ns to 10 µs (eight incremental selections)
• Sampling Resolution: 5 cm to 32 m (eight selectable increments)
• Maximum Data Points: Up to 128,000 (Firmware Rev 2.01 or later)
• Distance Accuracy: ±1 m + measurement distance × 2×10⁻⁵ ± sampling resolution
• Loss Accuracy: ±0.05 dB (for losses ≤1 dB)
• Loss Resolution: 0.001 dB (max 5 digits)
Integrated Instrumentation
• Light Source: 1310 nm and 1550 nm with automatic wavelength switching
• Optical Power Meter: Auto-switching capability synchronized with light source
• Return Loss Measurement: Common optical return loss (ORL) and total reflection between arbitrary trace points
– Key Features
• Full Auto and Manual (Expert) measurement modes
• PON measurement mode optimized for high-port-count splitter environments
• Single and multi-trace analysis: simultaneous display, two-way comparison, differential analysis
• Nonuniformities detection, auto pass/fail criteria, and splice loss quantification
• Fiber end-face inspection via external USB video probe
• Fault locator for rapid event identification
• Bright LCD display for field visibility
– Typical Applications
• PON network installation and commissioning
• Single-mode fiber plant acceptance testing
• Event localization and characterization
• Splice and connector loss analysis
• Fiber continuity and quality verification
– Compatibility & Integration
External USB video fiber inspection probe support for end-face documentation. Automatic wavelength synchronization between light source and optical power meter eliminates manual switching requirements.
