The Yokogawa AQ1205A is a compact, handheld Optical Time Domain Reflectometer (OTDR) engineered for field installation, maintenance, and troubleshooting of single-mode fiber networks. Operating at 1310 nm and 1550 nm, this instrument delivers high dynamic range performance suitable for Passive Optical Network (PON) systems with up to 64-port splitter configurations. The AQ1205A combines core OTDR functionality with optional integrated optical power meter and light source modules, enabling multi-parameter fiber characterization without switching between separate instruments.
Technical Specifications
OTDR Measurements
• Wavelengths: 1310 nm and 1550 nm
• Event dead zone: ≤0.8 m
• Pulse width: 100 ns
• Loss measurement accuracy: ±0.05 dB/dB (for losses ≤1 dB)
• Readout resolution: 0.001 dB (minimum)
• Return loss measurement: Return loss and total return loss capable
• Vertical scale options: 0.2, 0.5, 1, 2, 5, 7.5 dB/div
• Data storage: 10 to 1000 points
• Logging interval: 0.5, 1, 2, 5, or 10 seconds
• Fiber type: Single-mode fiber (ITU-T G.652)
Optional Optical Power Meter
• Measurement types: Optical power, CW, CHOP (270 Hz/1 kHz/2 kHz)
• Power units: dBm, mW, µW, nW, and relative power (dB)
• Dual-wavelength capability: Simultaneous 1490 nm and 1550 nm measurement with wavelength separation for PON applications
Optional Light Source
• Independent operation from OTDR
• Automatic wavelength switching between 1310 nm and 1550 nm
• High output level stability
• Wavelength information transmission to paired power meter
– Key Features
• High dynamic range for demanding PON measurements
• Compact, lightweight design for field portability
• Modular architecture—OTDR, optical power meter, and light source operate independently or integrated
– Typical Applications
• Single-mode fiber cable installation and commissioning
• PON system testing and characterization
• Optical network maintenance and fault location
• Return loss and attenuation measurement
– Compatibility & Integration
Auto-switching light source and optical power meter coordinate wavelength selection across 1310 nm and 1550 nm bands, streamlining PON field workflows.
