The EXFO LTS-3903-BR23BL-EA is a dual-function optical loss test set integrating a calibrated power meter and selectable light source for insertion loss and optical return loss (ORL) measurements across singlemode and multimode fiber networks. Purpose-built for component qualification and fiber assembly verification in laboratory and manufacturing environments, this instrument delivers fast, repeatable measurements with intuitive operation and data management capabilities.
## Technical Specifications
**Power Meter**
• Detector Type: InGaAs (1 mm)
• Wavelength Range: 850 nm to 1570 nm
• Measurement Range: +4 dBm to −75 dBm
• Uncertainty: ±5% (0 to −53 dBm)
• Output Units: dBm or Watts
**Light Source**
• Type: CW Source
• Wavelengths: 1310 nm and 1550 nm (selectable lasers)
• Integrated ORL measurement functionality
**Interfaces**
• Source Fiber Contact: APC
• Detector Fiber Contact: Freespace
• VFL Optical Connector: SC/PC (optional)
• Serial Port: RS-232 DTE
• Control Port: GPIB
**Power & Environment**
• Input: 100 V to 240 V AC, 50/60 Hz, max 2 A
• Dimensions: 11 cm × 22 cm × 28 cm
## Key Features
• Integrated ORL measurement option for reflectance testing
• Dual-wavelength operation (1310 nm and 1550 nm) with independent laser selection
• Manual data storage up to 512 readings; programmed acquisition supports 1024 data points
• Label printing utility for insertion loss and ORL test results
• Remote control via RS-232 and GPIB interfaces
• Optional Visual Fault Locator (VFL) installation capability
## Typical Applications
• Fiber optic component insertion loss characterization
• Cable assembly acceptance testing
• Manufacturing floor qualification of passive optical networks
• Laboratory insertion loss and return loss validation
## Compatibility & Integration
EXFO Universal Interface (EUI) Connector Adapters and EXFO FOA adapters for detector inputs are sold separately. The RS-232 and GPIB interfaces enable integration into automated test stations and remote operation from external control systems.
