The EXFO BRT-320A is a specialized optical reflection test set engineered to measure optical return loss (ORL) in fiber optic networks at 1550 nm. This handheld instrument delivers precise ORL characterization and component reflectance verification across long-haul and DWDM systems, preventing Fresnel reflections and Rayleigh scattering from degrading performance or increasing bit error rates. The BRT-320A combines rapid laser stabilization, field-ready portability, and accurate reflection measurements in a single platform.
## Technical Specifications
• **Wavelength:** 1550 nm (±15 nm)
• **Measurement Range:** 0 dB to −70 dB
• **Resolution:** 0.01 dB or 0.05 dB
• **Linearity:** ±0.1 dB
• **Fiber Type:** Singlemode, 9/125 µm
• **Optical Interface:** FC/APC
• **Detector:** Internal InGaAs
• **Light Source:** Built-in TEC laser, thermoelectrically cooled with rapid stabilization
• **Data Storage:** 300 readings (non-volatile memory)
• **Display:** Large backlit LCD
• **Power Options:** Rechargeable NiCd battery, 9 V battery, AC adapter
• **Operating Temperature:** −10 °C to 40 °C
• **Reference Temperature:** 23 °C ± 2 °C
• **Dimensions:** 21 cm × 11 cm × 5 cm
• **Weight:** 0.8 kg
## Key Features
• Measures cumulative link return loss and individual component reflectance
• ORL zero function compensates for incidental backreflections upstream of measurement point, meeting Bellcore OCWR requirements
• User calibration mode allows zeroing to known reflection standards
• Dual functionality as stable continuous-wavelength light source for attenuation measurements
• Protective holster and shoulder strap included
• Designed for field deployment in demanding network environments
## Typical Applications
• Telecommunications and long-haul fiber networks
• DWDM system characterization and validation
• CATV and broadband infrastructure testing
• Fiber component and cable manufacturing QA
• Utility network fiber installations
• Transmission equipment manufacturing
## Compatibility & Integration
Designed for singlemode 9/125 µm fiber with FC/APC connectors. Single-wavelength configuration optimized for 1550 nm operation.
