Aug
24

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Tek Noise Spectrogram

Displaying spectrograms on modern-day oscilloscopes

A valuable feature in the Tektronix MDO 3000 Series oscilloscopes is the spectrogram, which lets users view in an unusual way aspects of high-frequency signals that may not…

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Aug
16

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Sine Eye featured

Basics of eye diagrams

An eye diagram is used in electrical engineering to get a good idea of signal quality in the digital domain. To generate a waveform analogous to an eye…

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Aug
11

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lissajous

Using a scope to display Lissajous patterns

The most common use of an oscilloscope is to display one or more signals in the time domain. A variation is the display of signals in the frequency…

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Aug
11

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calibration services

Calibration Services handle PXI gear from multiple vendors

Instrument maker Keysight Technologies, Inc. says it will now handle equipment from other instrument vendors at its One-Stop Calibration Services. Keysight says the reason for the move is…

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Aug
9

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swept spectrum analyzer

The difference between real-time and swept spectrum analyzers

Spectrum analyzers fall into two basic categories, real-time and swept. Real-time spectrum analyzer technology is derived from that of the oscilloscope. The instrument first gathers data in the…

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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…