Conceptually, the interferometer is a relatively simple instrument that compares two distances typically differing only by a slight amount. Two waves, often coherent light waves, reflect from standard mirrors mounted at the object under investigation. The light from one mirror passes through a half-silvered mirror while the light from the other reflects from the back […]
Difference between measuring resistance and conductivity
Generally, an electrical conductor is a long solid rod, often insulated. It may be rectangular, like the electrician’s bus bar, irregular in cross section, or it may be merely a conductive path through the atmosphere, created by a process of ionization. Most electronics professionals have measured the resistance of conductors typically using a volt-ohm meter. […]
Are you sure you know what bandwidth means?
Bandwidth is a principal specification when choosing an oscilloscope or related instrument. What it means in this context is a displayed signal’s maximum frequency above which the scope attenuates the amplitude of the signal it sees. Problem is, this isn’t the only definition of bandwidth. The concept has slightly different meanings (and consequences) depending on […]
Subtleties of math functions in digital storage oscilloscopes
One of the great innovations in modern oscilloscopes is the Math mode. Even in many inexpensive scopes, it generally takes three forms: Dual Waveform Math, FFT, and Advanced Math. Dual Waveform Math requires two waveforms displayed in separate channels to function, but aside from that, it is quite simple. You just run a couple BNC […]
Working with oscilloscope probes, part two
The oscilloscope can be viewed as essentially a voltmeter that incorporates a dynamic display. But the oscilloscope can also make use of a current probe to convert current information into corresponding voltage potentials displayed in units of Amperes. The current-to-voltage conversion takes place within the current probe which operates like the electrician’s clamp-on ammeter. The […]
Basics of oscilloscope probes – Part one
Engineers know what an oscilloscope probe is. It basically permits the user to measure the voltage at any terminal or wire and display the waveform. It usually incorporates a needle point that is capable of getting into a tight place without shorting out to another pin, wire or grounded surface. And it can be equipped […]
USB power sensor characterizes Wi-Fi 6 devices
The Boonton RTP5008 Real-Time Peak USB Power Sensor enables characterization of Wi-Fi 6 devices in the newly allocated 6-GHz band (5.925 to 7.125 GHz). The RTP5008 offers industry-leading performance with wide video bandwidth, fast rise times, fine time resolution, narrow minimum pulse widths, high pulse repetition rates, and superior measurement reading rates. The RTP5008 can […]
High-speed camera excels at object tracking, flow visualization, microscopy
The Phantom T1340 is a high-resolution camera that captures images up to 13 Gpx/sec, doubling the capabilities of other four-megapixel cameras in its class. The 2048×1952 low-noise sensor, occupying a compact form factor, is a candidate for demanding measurement applications such as object tracking, flow visualization, microscopy and modern imaging techniques, like Digital Image Correlation […]
Cellular-V2X test plan advances AV, connected car development
Certification of a cellular vehicle-to-everything communications (C-V2X) test plan has been realized using Keysight Tehnology’s RF/RRM DVT & Conformance Toolset and the Qualcomm 9150 C-V2X Platform, a standalone C-V2X modem chipset with global navigation satellite system (GNSS). Test cases focused on radio frequency (RF) and radio resource management (RRM) performance verification of devices used for […]
Test and alignment software/hardware setup handles public-safety radios
An Auto-Test setup works with the L3Harris Technologies XG-25M, XG-25P, and XG-15P radios on the VIAVI 3920B Radio Test Platform and 8800SX Digital Radio Test Set. The development enables automated test and alignment of the best-in-class L3Harris XG-25M, XG-25P, and XG-15P two-way radios. These Auto-Test applications perform fast, repeatable, and accurate alignment and test matching […]
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