EXFO FiberFinder LFD-300B/TG-300B Live Fiber Identifier/Tone Generator Spec Sheet

EXFO spec sheet for the FiberFinder LFD-300B live fiber identifier and TG-300B tone generator, covering features, applications and specifications.


EXFO FiberFinder LFD-300B/TG-300B Live Fiber Identifier/Tone Generator Spec Sheet - cover page
Brand
EXFO
Category
fiber optic
Document type
Product Leaflet
Language
English
Pages
4
File format
PDF
File size
1.1 MB
Published
06 November, 2026
Updated
06 November, 2026
MD5 checksum
148AA30CC65E616A89EB3E3E54EEBD64

About this manual

This four-page spec sheet from EXFO describes the FiberFinder LFD-300B/TG-300B, presented as a triple test tool combining a live fiber identifier, a live fiber detector and a dark fiber identifier. The document lists key features such as pinpointing a specific live fiber with EXFO's FiberFinder functionality, an induced loss of 1 dB or less, dark fiber location through tone recognition at 270 Hz, 1 kHz and 2 kHz, and a test cycle of under 6 seconds.

The sheet explains the live and dark fiber identification problem and how the LFD-300B and the TG-300B tone generator address it, including automatic angle optimization to limit insertion loss, ambient light offset, and a clip-on arm for single-person use. General specifications, fiber and loss specifications, ordering information for the LFD-300B, TG-300B and TK-FF kit, and FCC and WEEE compliance notes complete the document.

What's inside

  • Key features
  • Applications
  • Pinpointing live and dark fibers
  • Ambient light offset
  • FiberFinder functionality
  • General specifications
  • Specifications
  • Ordering information

Specifications

Size (H x W x D)245 mm x 45 mm x 55 mm (9 5/8 in x 1 ¾ in x 2 ¼ in)
Weight (without batteries)0.35 kg (0.8 lb)
Operating temperature0 °C to 50 °C (32 °F to 122 °F)
Storage temperature–40 °C to 70 °C (–40 °F to 158 °F)
Relative humidity0 % to 93 % non-condensing
Fiber type3 mm, 1.6 mm, 900 µm
Insertion loss≤1 dB (maximum guaranteed)
Power range25 to –35 dBm
Power measurement repeatability±1 dB
Test time<6 s
Tone frequencies for dark fiber identification270 Hz, 1 kHz, 2 kHz

Frequently asked questions

What is the maximum insertion loss of the LFD-300B?

A maximum loss of 1 dB is guaranteed for most singlemode telecom fibers and any wavelength.

How fast is the test cycle?

The test cycle takes less than 6 seconds.

Which fiber jacket sizes is the LFD-300B optimized for?

It is optimized for 900 µm, 1.6 mm and 3 mm jackets, with no need to replace the headpiece.

What tone frequencies are used to locate a dark fiber?

Dark fibers are located using tone recognition at 270 Hz, 1 kHz and 2 kHz.

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