The EXFO LTS-3900 Loss Test Set integrates a stable light source, precision optical power meter, and optional optical return loss (ORL) meter into a single instrument for comprehensive optical network testing. It delivers insertion loss and optical return loss measurements across single-mode and multimode fiber, supporting up to 20 programmable wavelengths with selectable laser and LED source configurations. The unit automates ORL and insertion loss test procedures, stores up to 1024 data points per acquisition, and interfaces via GPIB and RS-232 for remote control and data logging.
## Technical Specifications
**Light Source**
• Programmable wavelengths: up to 20
• Laser options: dual-wavelength configurations (02BL, 03BL, 23BL)
• LED options: dual-wavelength configurations (12C, 12D, 23B)
**Power Meter**
• Display modes: dBm or watts
• Manual data storage: up to 512 readings
• Programmed data acquisition: up to 1024 data points per acquisition
• Offset nulling supported
**Optical Return Loss (ORL) Meter**
• Automated ORL and insertion loss test procedures
• Step-by-step guided measurement workflow
• Configuration option: BR23BL
**Visual Fault Locator (Optional)**
• Fault detection range: up to 5 km
• Output: bright red light (continuous or 1 Hz modulated)
• Compatible with yellow-jacketed fibers
**Data Management**
• Storable setups: up to 10 configurations for multi-user environments
• PC connectivity: label printing utility for test result documentation
**Interfaces**
• GPIB and RS-232 for remote control and data acquisition
**Physical and Environmental**
• Dimensions: 11 cm × 22 cm × 28 cm (4.5 in × 8.5 in × 11.25 in)
• Optional 19-inch rack mounting available
• Power input: 100 V to 240 V AC, single-phase, 50/60 Hz
• Maximum input current: 2 A
**Compliance**
• FCC Part 15 Class B digital device
• ISO 9001 certified manufacturer
## Key Features
• Modular architecture supports laser, LED, ORL meter, and VFL options
• Dual-wavelength capability reduces test time on multi-fiber systems
• Automated test procedures eliminate manual workflow errors
• Exceptional data capacity for high-volume certification campaigns
## Typical Applications
• Component qualification and fiber assembly testing
• R&D optical system development
• Manufacturing process control
• Field service diagnostics and commissioning
## Compatibility & Integration
Designed for single-mode and multimode fiber testing. Remote control and automated data acquisition via standard GPIB and RS-232 interfaces enable integration into test racks and automated certification workflows.
