Press Release
De-skew correction enhances accuracy of oscilloscope-based power measurements
High-frequency power measurements can now be carried out with greatly enhanced accuracy using a de-skew correction signal source, along with voltage and current probes, in conjunction with the /G4 power measurement option on the Yokogawa ranges of digital and mixed-signal oscilloscopes.
Even though power measurement using an oscilloscope is fundamentally less accurate than using a digital power meter, it offers much higher bandwidth. It is particularly suitable for measuring high-frequency switching losses in switched-mode power supplies. It also provides a power measurement capability using a general-purpose product which has other uses, an option that may be more acceptable to users who are not ready to invest in a true power meter or have limited budgets for test equipment.
The de-skew correction signal source is an accessory which is specifically designed to maximise the measurement accuracy of oscilloscopes when they are used for power measurements involving fast switching devices and high-frequency waveforms.
To correctly measure power-supply parameters such as power, impedance, power factor, watt-hours and ampere-hours from the voltage and current under analysis, the voltage and current signals must be applied to the signal input terminals of the oscilloscope with no difference in the transfer time. The signal source corrects the potential delays between voltage and current channels in combination with the auto de-skewing function provided as part of the /G4 option.
The unit produces an output voltage from 0 to 5 V and an output current of 0-100 mA (for low-current measurements) or 0-1 A (for high-current measurements). It has a fall time of approximately 25 ns (low current) or 250 ns (high current). The fixed time difference between voltage and current is 2.3 ± 0.5 ns (low current) or 14.5 ± 1.0 ns (high current). Its power supply of 5 V DC/100 mA is taken from the oscilloscope via a USB cable.
The de-skew correction signal source supports through-type current transformers and a variety of clamp-on current probes.
Yokogawa is the market leader in precision power measurement, and is the only test and measurement manufacturer to offer both a complete range of power meters/analysers and digital oscilloscopes with power measurement capabilities.
For further information about the de-skew correction signal source visit www.tmi.yokogawa.com/ea
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About Yokogawa Test & Measurement
Yokogawa Test & Measurement Division is a major worldwide force in the test & measurement market, with products that include oscilloscopes, power meters, wireless and optical communications test equipment, portable test instruments, recorders and data-acquisition systems, and semiconductor-related test systems.
For more information about Yokogawa Test & Measurement, please visit the company's web site at www.tmi.yokogawa.com/ea
About Yokogawa Electric Corporation
Yokogawa's global network of 25 manufacturing facilities and 80 companies spans 54 countries. Since its founding in 1915, the US$3 billion company has been engaged in cutting-edge research and innovation, securing more than 7,200 patents and registrations, including the world's first digital sensors for flow and pressure measurement. Industrial automation and control, test and measurement, information systems and industry support are the core businesses of Yokogawa. For more information about Yokogawa, please visit the company's web site at www.yokogawa.com
Download release as zip file (476k)Learn more about Yokogawa Europe - Test & Measurement- Terry Marrinan
- Yokogawa Europe - Test & Measurement
- European Test & Measurement Centre
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