Jul
25

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Triggering options in the Tektronix MDO3104 oscilloscope

In oscilloscope development, triggered sweep was a major innovation. It emerged as part of the great electronics boom in the post-World War II period. It came in handy…

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Jul
22

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VIDEO: Using the Tektronix MDO3104 Oscilloscope to Perform Noise Abatement

Two methods, bandwidth limiting and repetitive waveform averaging, are used to mitigate noise that is added to a sine wave.

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Jul
19

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How to test motors with an oscilloscope

The three-phase induction motor is ubiquitous in industrial applications because of its reliability and need for infrequent maintenance. Without brushes and externally commutated by the utility-supplied waveform, there…

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Jul
13

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VIDEO: We connect two sine waves, first in-phase, then 90 degrees out of phase, to channels 1 and 2 in a BK2516 oscilloscope and display the Lissajous patterns

We connect two sine waves, first in-phase, then 90 degrees out of phase, to channels 1 and 2 in a BK2516 oscilloscope and display the Lissajous patterns.

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Jul
12

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Noise featured

Using a scope to read signals obscured by noise

Noise in electronic circuits can be defined in a variety of ways, but it is almost always undesirable. The principal types of noise are thermal noise, shot noise,…

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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…

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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…