Sep
21

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How To Measure Power Factor With An Oscilloscope

By definition, power factor is a dimensionless quantity ranging from -1 to 1. It is the ratio between real power dissipated in the load and apparent power, which…

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Sep
15

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How Not To Destroy an Oscilloscope

In an electronics lab, a recently-built advanced oscilloscope is one of the more costly test instruments. To protect this investment from instant destruction or long-range degradation, engineers and…

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Sep
7

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modulation display

Displaying radio frequencies on oscilloscopes

Radio Frequency (RF) generally refers to electrical signals at frequencies between 3 kHz and 300 GHz. Within the electromagnetic spectrum, this comprises a broad range of oscillating energy,…

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Sep
1

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Understanding oscilloscope display modes

Oscilloscopes vary in form factor, capabilities and purpose but there are elements they have in common, most notably a display where waveforms are made visible. The defining characteristic…

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Aug
30

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labview

End of an era at National Instruments: Dr. James Truchard, CEO and co-founder, to step down

National Instruments, best known for its LabVIEW program and platform-based instrumentation systems, says Alex Davern, age 49, will serve as Chief Executive Officer and President, effective January 1,…

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Featured

waveguide featured

Basics of waveguides

Monday, March 23, 2015

There is something almost comical about a waveguide – the notion that electromagnetic signals or usable power could pass through a hollow pipe and that techniques appropriate to…

oliver heaviside

Oliver Heaviside and Maxwell’s equations

Friday, March 6, 2015

Oliver Heaviside’s life, spanning the years 1850 to 1925, began and ended in squalid surroundings. He was never entirely free of the dark melancholy that characterized his private…

keithley handbook

Answer this 5-question quiz, win a measurement handbook

Thursday, March 5, 2015

What’s your test IQ? Answer this five-question quiz and be entered to win one of 20 Low Level Measurement Handbooks graciously donated to us by Keithley Instruments, a…

VFD simple schematic

Variable Frequency Drives: Viewing the DC Bus

Thursday, September 25, 2014

By David Herres In the field of motion control it’s often necessary to vary the speed of an electric motor and even reverse its direction of rotation. When…