All Things Measured

- September 26, 2013

Chris Grachanen covers the technologies and techniques used to make quality measurements. His focus is high frequency applications, calibration methodologies, and industry trends that reflect today's measurement challenges in research projects and the developing, debugging and maintaining of commercial products.


IEEE Working Group to cover high-speed PCB measurements

  • 07.28.2015

IEEE Working Group P370 is investigating ways to standardize S-Parameter measurements for signal integrity using VNAs.Read More...

Compare measurement data with Youden plots

  • 06.26.2015

These useful plots let you see how the measurements from two or more labs compare to each other, making outliers easy to identify.Read More...

Calibration means different things in different professions

  • 05.21.2015

Because the term "calibration" isn't listed in official government job listings, educators and job councilors might not guide people into the field.Read More...


TDR response tells a story

  • 12.12.2014

Inductance and capacitance in connectors and PCB vias affects TDR response, which lets you characterize signal transmissions.Read More...

Measuring a signal's flight time

  • 04.25.2014

High-frequency signals take time to travel through circuit-board traces. You need to know how much time.Read More...

Measure Q-Factor With a VNA

  • 02.21.2014

Even if your vector-network analyzer doesn’t have Smith Chart capability or Q-Factor measurements, you're not out of luck. Free software is available that can make the calculations from S-parameter measurements.Read More...


The telegrapher’s galvanometer

  • 01.21.2014

While we now have better equipment for measuring current and characterizing transmission lines, it all started with a galvanometer.Read More...


Measurement Sensors: For a Calculator?

  • 12.06.2013

In a followup to "Not Your father's Calculator," Christopher L. Grachanen looks at the measurement capabilities in the TI-Nspire calculator.Read More...

Not Your Father's Calculator

  • 11.22.2013

Besides solving algebra problems, today's calculators can become data-collection devices with attached sensors.Read More...

Most versatile test equipment

  • 10.21.2013

They don't make them like they used to. Some tools do it all, so you keep them around as long as possible and then look for used ones.Read More...


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