Test & Measurement Featured Articles

Overcoming the challenges of testing PON products over multiple kilometers of fiber

According to the July/August 2010 Lightwave magazine article “Testing PON devices with multiple kilometers of optical fiber,” the use of burst-mode data CDRs (BCDRs) in the latest...

Solving mobile backhaul service verification challenges

Service verification for mobile wireless backhaul ensures a better customer experience for mobile users. The selection of the correct service verification tools plays a critical role in ensuring...

Smart grid offers test gear opportunities

JULY 7, 2010 By Stephen Hardy -- Electric utilities have deployed fiber-optic networks for decades. So it’s no wonder that many utilities have looked to fiber optics to help enable their...

New approach aids advanced 40/100-Gbps modulation format characterization

By Laura Martínez and Enrique Pellejer Overview Derived from stimulated Brillouin scattering, the Brillouin optical spectrum analysis technique enables phase and amplitude measurements...

Measuring complex optical modulation in fiber

By Daniel van der Weide Overview This article reviews both sampling and real-time techniques for signal conversion, compares many of the current instruments for measurement of complex...

Characterizing advanced modulation formats using optical sampling

By François Robitaille Overview The shift to more complex modulation formats for high-speed communications means a change in the way designers and network managers measure signal...

MSOs' metro, core test needs evolve

by Meghan Fuller Hanna Today's MSOs are taking advantage of access technologies like Switched Digital Video (SDV), DOCSIS 3.0, and RF over Glass (RFoG) to increase bandwidth to their subscribers...

Ethernet OAM test applications

by Reza Vaez-Ghaemi, Ph.D. Overview For Ethernet to become carrier grade, a number of improvements must be developed and deployed. This paper introduces operation, administration, and maintenance...

Get the most from 10-Gbps to 40/100-Gbps network migration

by Olivier Jerphagnon Overview Experience suggests that the next wave of network migration will bring its share of challenges and surprises. New breakthroughs such as in-service monitoring offer a...

Answers at hand for 100-Gbps test challenges

by Meghan Fuller Hanna Overview It's hard to test phase-modulated signal formats with instruments designed for amplitude modulation. Help for technology developers may finally be on the way,...