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With an unbeatable combination of a small pocket-sized form factor, a high-resolution color LCD display, and some of the lowest pricing in the industry, the OWLTrek OTDR from OWL is the WISE choice for cost-conscious buyers who only need to perform basic troubleshooting or restoration tasks on singlemode optical fiber networks. All this from an OTDR that really is pocket-sized and fair priced, yet having comparable features and specifications to other OTDRs in its class.

Affordability. In a time when it is becoming increasingly difficult to justify equipping an entire technical staff with high-end equipment, companies are even more cost-conscious than before. These companies outfit a majority of their installation/repair personnel with OWLTrek OTDRs, and set aside a few high-end “expert” devices for high-priority jobs.

Key Specifications:

  • Singlemode
  • Output wavelength options: 1310 and 1550nm
  • Dynamic range: 25 dB (1310nm) / 23 dB (1550nm)
  • Event Dead Zone: 2 meters (typical)
  • Attenuation Dead Zone: 7 meters (typical)
  • User-selectable Pulse Width: 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000 meters
  • Distance Range: 128 km
  • OTDR port: SC/UPC
  • VFL port: 2.5mm universal


Automatic event location is an advanced feature normally found only in expensive, high-end OTDRs. The OWLTrek OTDR now brings this feature to the entry-level OTDR market.

The OWLTrek OTDR includes an event table showing the location, type, reflectance level, and loss of each event.  Users can select an event to view, and automatically zoom in on the event on the OTDR display.


The OWLTrek OTDR may be pocket-sized, but the large 2.8” high-resolution color LCD display can show even the longest traces with ease. And, for greater viewing flexibility and trace detail, OWL has implemented state-of-the-art MEMS technology which “flips” the high-resolution color LCD display between portrait and landscape mode automatically. In landscape mode, a wider viewing area means greater viewing detail when zooming in on events.


OWLView software allows the user to download stored traces from the OWLTrek OTDR to a PC.

Features include:

  • Event analysis
  • Data storage using Telcordia GR-196 2.0 file format
  • Printed reports for hard-copy record keeping
  • Help menu with links to manuals, quick reference guides, and videos


Live mode is another advanced feature normally found in high-end OTDRs.  Live mode continuously shoots OTDR traces every few seconds, allowing users to monitor changes in the optical fiber in real-time.

In addition, when the OWLTrek is attached to a PC, OWLView software includes a Live Viewer mode that takes the OTDR trace and expands it onto the PC display for easier viewing.

**- factors that limit OTDR distance range include splices, interconnections, fiber quality, fiber attenuation, and other loss inducing events such as micro-bends and macro-bends

Each unit includes:

  • OWLTrek Singlemode OTDR
  • Integrated Visual Fault Locator (VFL) port
  • Hard-shell carrying case
  • USB download cable
  • Battery charger (US only)
  • USB flash drive with OWLView trace software, USB driver, product manuals, and product videos
SKU Description Fiber Type Wavelength Dynamic Range (Distance) *

Integrated VFL

T-WTO-S13 OWLTrek 1310 Singlemode 1310nm 25dB (80 miles)* Yes
T-WTO-S15 OWLTrek 1550 Singlemode 1550nm 23dB (80 miles)* Yes 00
T-WTO-S35 OWLTrek 1310/1550 Singlemode 1310/1550nm 25/23dB (80 miles)* Yes 00


Locate breaks and other faults in singlemode fibers within six feet up to 80 miles away! **

* Dynamic Range / Distance: OWLTrek singlemode OTDRs are capable of finding breaks in singlemode optical fibers up to 80 miles to within +/- 6 feet. Additional splices and other loss producing events will limit end distance estimates.  This is true for all OTDRs.  However, passive singlemode Telco links are almost always less than 12 miles long.  At this distance, OWLTrek OTDRs have break finding capability of about +/- 1 meter!  In fact, increased dynamic range is actually a disadvantage in almost all cases because of the increased OTDR cost (usually thousands of dollars more).




SKU # Length Fiber Type Connector Type
DZB-SM-1100 1100 meters singlemode SC/UPC