EXFO LFD-300/TG-300 Live fiber detector/tone generator

The EXFO LFD-300/TG-300 is a handheld live fiber detector and tone generator for identifying active optical signals and locating individual fibers within cable bundles without service interruption. The instrument combines non-disruptive live fiber detection with audible tone injection, enabling technicians to safely troubleshoot and maintain active fiber optic infrastructure while preserving network continuity.

## Technical Specifications

**Live Fiber Detection**
• Detects optical signal presence across telecommunications wavelengths including 1310 nm and 1550 nm
• Minimal insertion loss to prevent signal degradation during detection
• Compatible with single-mode and multimode optical fibers
• Visual and audible indication of detected live fiber
• Directional signal propagation indication capability

**Tone Generator**
• Emits audible tones at 270 Hz, 1 kHz, and 2 kHz for fiber identification
• Modulation options: continuous or pulsed tone output
• Non-contact or low-insertion loss coupling method for tone injection

**Physical Design**
• Handheld form factor for field deployment
• Battery-powered operation with LED/LCD visual indicators
• Audible alert functionality via buzzer or speaker
• Operating temperature range specified for reliable field use
• Storage temperature range defined for safe equipment preservation

## Key Features

• Live traffic detection without fiber disconnection
• Precise fiber identification within multi-fiber assemblies
• Correlated tone injection and detection workflow
• Battery status monitoring via display indicators
• Operational status visibility for signal presence and tone confirmation

## Typical Applications

• Active fiber identification during maintenance and repairs
• Network expansion planning on energized infrastructure
• Cable bundle discrimination in crowded duct environments
• Troubleshooting without scheduled downtime
• Field verification of fiber routing and connectivity

## Compatibility & Integration

The LFD-300/TG-300 operates across standard telecommunications fiber types and wavelengths. Single-mode and multimode fiber support enables deployment across diverse network architectures. Non-disruptive detection and injection methods preserve signal integrity on live circuits.