Fiber Optics Safety

Fiber Optic Safety
Fiber optics safety is a crucial part of successfully completing a fiber optic installation or repair. Safety can often be overlooked when working with fiber as it is an extremely safe working material. Although this is true, safety should still be a top priority when doing an installation or performing maintenance on a fiber system. In today’s blog post we will review some of the most important safety concerns when performing your job.

Today we… Continue Reading »

What is OTDR?

An OTDR is an extremely valuable tool when you are trying to characterize optical fibers. OTDR (optical time domain reflectometers) units are used to locate any events in your fiber cable and the amount of attenuation of the fiber. An OTDR uses the effects of Rayleigh Scattering and Fresnel Reflections to measure characteristics in your fiber. The OTDR will send a light pulse down your fiber and by measuring the time it takes for… Continue Reading »

Fiber Connector Types

Fiber Connector Types
Often times when installing a fiber, you find yourself trying to select the most efficient fiber connector types for the application you are dealing with. JM Test Systems is here to ensure that you select the connector that will perform best for your needs. This blog post will break down the most common fiber connector types and explain their pros/cons, so that you can properly determine your selection of which connector you would like… Continue Reading »

Fiber Optic Testing

Fiber Optic Test Equipment
Fiber optics is the core of today’s datacom networks. Optical fiber is the predominant media type for mission-critical datacenter links, backbone within buildings, and longer distances for campus networks. As network speeds and bandwidth demands increase, distance and loss limitations have decreased, making fiber optic testing more important than ever.

Inspecting Fiber Optic Cable for Light Loss

For decades, optics have been inspected and cleaned to ensure the proper passage of light. While… Continue Reading »

CALIBRATION TECH BRIEF: BK Precision 4010A – VCG Out of Tolerance


The Out of Tolerance Solution

We had two BK4010A generators in for calibration in the JM Test Alexandria Lab recently, and all parameters except one were well in tolerance.  The out of tolerance condition was the Voltage Controlled Generator(VCG) frequency section of the verification.

Briefly, the verification consists of the following:
Set the Frequency Range to 200 kHz, and the dial to 2 (setting the frequency to 200 kHz).  Apply a… Continue Reading »

Understanding Cable & Antenna Analysis Part 1

Cable and antenna system cell tower


The cable and antenna system plays a crucial role of the overall performance of a Base Sta­tion system. Degradations and failures in the antenna system may cause poor voice quality or dropped calls. From a carrier standpoint, this could eventually result in loss of revenue.

While a problematic base station can be replaced, a cable and antenna system is not so easy to replace. It is the role of the field technician to troubleshoot the… Continue Reading »

Choosing the Right Cable Test Tool

Guide to Choosing the Right Cable Test Tool to Meet Your Testing Needs

New cable test tools, designed to perform various tasks at various price ranges, are emerging at a rapid rate in today’s competitive market of cable test equipment. All cable test tools are useful for specific applications and users, but not all meet TIA/ISO performance standards and certification warranty requirements. It’s important to… Continue Reading »

The State of the Cabling Certification Industry

The New Normal: Multi-Everything

This white paper explores the state of the cabling industry – where it has been and where it is going. It evaluates what it takes to succeed in the face of an exponentially greater need for cabling contractors to manage multiple environments, media, standards, and technologies. In this new multi, multi, multi world – the new normal – what do cabling… Continue Reading »

Cable Testing Basics – Certification, Qualification and Verification

Cable Testing

Whether installing new cable, or troubleshooting existing cable, cable testing with a unit like a Fluke Networks DTX-1800 plays an important role in the process. Common tests for datacom cabling include length, wiremap, attenuation, NEXT, DC loop resistance, and return loss.

As networks evolve, so do the requirements of the cabling infrastructure to support them. New standards are continuously being developed to provide guidelines for cabling professionals when installing, testing,… Continue Reading »

What’s the #1 Cause of Fiber Network Failure?

What’s the problem?

Fiber basics

Fiber optic cabling carries pulses of light between transmitters and receivers. These pulses represent the data being sent across the cable.  In order for the data to be transmitted successfully, the light must arrive at the far end of the cable with enough power to be measured.  Light loss between the ends of a fiber link comes from multiple sources such… Continue Reading »