Save 50% of Your Testing Time with Loopback Test Method

Double your test efficiency by characterizing two fibers at once using iOLM’s loopback mode (iLOOP).

Loopback test methodology:

  • Loops two fibers together at one end to test both fibers at once from the other end
  • Software application will distinguish between the fibers in the reporting
  • Very useful in construction when fibers are deployed in pairs
  • Particularly efficient in short to medium-range fiber deployments and in any applications using Tx/Rx fiber (such as in data centers)
  • Allows to test both upstream and downstream links from a single port—ideal for Fiber-to-the-antenna (FTTA) or Distributed Antenna Systems (DAS) applications
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Loop Fiber

Key Benefits of Using Loopback Testing:

  • 50% less testing time as you characterize two fibers in one OTDR acquisition
  • Single-ended test: only one OTDR unit is required at one end of the link
  • Performing loopback testing with two technicians requires minimal expertise from the second technician, who simply needs to properly inspect the fiber connector with an inspection probe, clean it if required and then install the loop-fiber.
  • Distinct results for each fiber tested in loop (both OTDR and iOLM)
  • Intuitive link view (iOLM) or traditional graphical view (OTDR) to identify loop section easily

iOLM’s Loopback Testing Mode (iLOOP)

The iLOOP feature is an intelligent application that relies on the loopback single-ended measurement method to characterize two fibers at once using the iOLM. Once the measurement is completed, iLOOP splits the merged results into two individual links and applies pass/fail assessments to generate a report for each single fiber. By generating individual iOLM, OTDR (.sor) files and PDF reports automatically for all your fibers, iLOOP eliminates the need for post-processing so you can close your job immediately and directly from the field and move to the next fiber pair faster.



Data Post-Processing Software — FastReporter 2

The loopback mode in FastReporter 2 is a software option that processes field measurements taken in loopback and performs unidirectional or bidirectional measurement analysis. Just like with the iLOOP mode, the loopback mode in FastReporter 2 splits the merged results into two individual links and apply pass/fail assessments for each fiber. You can also use the FastReporter 2 loopback mode to re-process iLOOP measurements in case there's an error with the loop length definition or with the documentation. In addition to supporting iOLM measurements, the loopback mode also supports OTDR measurements.