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Fluke Networks Blog

  • Cabling Chronicles

    Copper and Fiber cabling industry news, standard changes/updates, customer insights and shared learnings.


Beware of Ghosts and Dead Zones!

It’s that time of year again with a chill in the air, falling leaves and all things spooky.

In the spirit of Halloween, we thought it apropos to take a look at two of the most confusing (and perhaps scariest) OTDR events--ghosts and dead zones.

When You See What Doesn't Exist


Wide Band Multimode Fiber – an Update

Recently, there has been some buzz about Wide Band Multimode Fiber (WBMMF). The 2016 edition of document TIA-492AAAE, released on June 1, is available. This document/standard is the detailed specification for 50 μm graded index multimode optical fiber with laser optimized bandwidth characteristics specified for wavelength division multiplexing. So, from an installed cabling testing perspective, what is the difference between WBMMF and other multimode fiber and how should you test it in the field?


Cable Testing 101: There's No Gain with "Gainers"

Akin to water flowing from a small pipe into a large pipe, gainers are essentially perceived increases in optical power that occur at splice points due to variations in fiber characteristics, including core diameter, numerical apertures, mode field diameters and backscatter coefficients.