EXFO LTS-3900 Loss Test Set

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.