Crônicas sobre cabeamento

Uma atualização sobre IEC 61280-4-1 Edição 3, Medição da atenuação multimodo da planta de cabeamento instalada

Introdução

IEC and other organizations, such as TIA, routinely reaffirm standards every few years. Reaffirmation is a way for subcommittees to decide if a standard is “dated” or still applicable to current times. Technology and market needs change often which drive standards to change.  IEC 61280-4-1 edition 2 was in such a cycle several years ago and it was decided an edition 3 was needed.

25 de junho de 2020

Testes de cabo 101: Understanding Near and Far End Crosstalk

If you're at all familiar with copper cable, you've probably heard about crosstalk--the phenomenon by which a signal transmitted on one pair or one channel creates an undesired affect on another pair or channel.

10 de junho de 2020

O mantra OM

Adopted by TIA, the nomenclature for multimode fiber found in the ISO/IEC 11801 standard includes the prefix “OM.”

Rather than the spiritual mantra you hear in yoga class, most sources in our industry state that the acronym OM comes from “optical multimode” which seems rather obvious. But when it comes to the various nuances of each type of OM, the differences aren’t quite as obvious.

Let’s take a closer look.

22 de maio de 2020

What are all those specialty cords you use?

I was recently asked by a customer, to whom I was demonstrating a Fluke Networks OptiFiber® Pro OTDR and CertiFiber® Pro OLTS, why do you need all those specialty test leads to make measurements?  Why can’t I use patch cords?  We often take the understanding of such things for granted, so let’s take an in-depth look at the various accessory cords you need to make measurements accurately with our testers.

7 de maio de 2020