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New Articles

Is it possible to image an electron?

February 25, 2021 By David Herres Leave a Comment

The electron has close to zero mass, a negative charge, and revolves in an orbit around its atomic nucleus or, alternately, moves through space or through a conductor, in which it is a charge-carrying free electron. An electron is also a fermion, which means it follows the Pauli exclusion principle: No two electrons can occupy […]

Filed Under: FAQ, Featured, New Articles Tagged With: FAQ

Combo multi-channel, mixed-signal scope/DAQ captures high-speed transients, long-term trends

February 19, 2021 By Lee Teschler Leave a Comment

DL950 ScopeCorder

The DL950 ScopeCorder improves efficiency and effectiveness in design and evaluation of renewable and energy efficient technologies. The DL950 ScopeCorder is a combination of a multi-channel, mixed-signal oscilloscope and portable data acquisition recorder. It captures both high-speed transient events and long-term trends. Building on the capabilities of the well-established DL850E, the new DL950 ScopeCorder can […]

Filed Under: Mixed-signal Oscilloscope, New Articles, Oscilloscope Descriptions Tagged With: Yokogawa

Clamp meter optimized for photovoltaic system tests

February 18, 2021 By Lee Teschler Leave a Comment

megger

A solar clamp meter can measure up to 2,000 Vdc and 1,500 Vac (using PVHV leads) during installation, maintenance, monitoring and testing of photovoltaic systems and standard ac or dc electrical equipment. The DCM1500S can also measure ac and dc current up to 1,500 A and offers a true RMS reading on the ac range […]

Filed Under: Meters & Testers, New Articles, Test Equipment Tagged With: megger

Understanding decibels and decibel measurements

February 16, 2021 By David Herres Leave a Comment

Decibels, (derived from bels, old units which, like unwieldy farads, are rarely used) are convenient and user-friendly terms for expressing the ratio between two amounts of power on a logarithmic scale or the amount of change, amplification or attenuation, over time of a single amount of power. In power and sound ratios, the factor is […]

Filed Under: FAQ, Featured, New Articles Tagged With: FAQ

Source measurement units reliably gauge currents from nanoamps to amps in a single sweep

February 16, 2021 By Lee Teschler Leave a Comment

R&S SMU

The R&S NGU series of high-precision SMUs feature innovative current feedback amplifier technology that provides both maximum sensitivity and accuracy to reliably measure currents from nanoamps to amps in a single sweep. To handle rapidly changing load conditions typical of battery-powered communications devices switching between sleep and transmit modes, the R&S NGU features an optimized control loop […]

Filed Under: Meters & Testers, New Articles, Test Equipment Tagged With: rohdeschwarz

Measuring and specifying microphones

February 11, 2021 By David Herres Leave a Comment

microphones

One aspect of the work-at-home/stay-at-home environment of the past year has been an increased emphasis on podcasts, online meetings, and online video events. That’s why there’s more interest in microphone technology among those interested in producing a higher-quality experience. Here’s a short run-down on microphones and how they are typically measured and quantified. A microphone […]

Filed Under: FAQ, Featured, New Articles, Test and Measurement News, Test Equipment Tagged With: cuidevices, FAQ

Waveguide-to-coax adapters use European IEC standard flanges

February 4, 2021 By Lee Teschler Leave a Comment

adapters

A new line of euro-style flange, waveguide-to-coax adapters are candidates for radar, satellite and wireless communications, and test instrumentation applications. Fairview Microwave’s new waveguide-to-coax adapters cover a wide range of waveguide sizes that include European IEC standard flanges (including UBR square cover, UDR and PDR types), WR-22 to WR-430, right-angle and end-launch coaxial connector options, […]

Filed Under: Communication Test, New Articles, Test and Measurement News, Test Equipment, wireless, wireless test equipment Tagged With: fairviewmicrowave

Antennas and antenna measurements

February 1, 2021 By David Herres Leave a Comment

antennas

Most antenna designs operate via the resonance principle, which is based on the fact that electrons moving through a conductor reflect back toward the power source when encountering a discontinuity. When current, caused by a radio signal’s induced voltage, reaches the end of the antenna element, it is reflected, travels in the reverse direction, and […]

Filed Under: Communication Test, FAQ, Featured, New Articles, Test Equipment, wireless test equipment Tagged With: FAQ, rohdeschwarz

Measuring the behavior of electronic filters

January 8, 2021 By David Herres Leave a Comment

Passive electronic filters are composed of one or more passive components including resistors, inductors and capacitors. In contrast, active electronic filters also contain an amplifier composed of transistors or op-amps. The point of electronic filters is to pass some frequencies while blocking others. Depending upon the configuration, they selectively attenuate high frequencies (low pass), low […]

Filed Under: FAQ, Featured, New Articles, Test Equipment, vector network analyzer Tagged With: analog devices, FAQ

OpenVPX chassis platform supports speeds over 100 GbE, 2.5 kW of cooling

January 5, 2021 By Lee Teschler Leave a Comment

9U RiCool_14-slot_OpenVPX

The 9U RiCool chassis platform for 6U OpenVPX boards features dual hot-swappable 191 CFM fans for cooling up to 2,500 W. The design allows the use of Rear Transition Modules (RTMs) in all slots. Rear-pluggable PSUs provide power for the VPX and custom rails, available in various wattage and output options. The 14-slot design required […]

Filed Under: New Articles Tagged With: pixustechnologies

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