De-skew correction enhances power measurements
15 September 2010
Test & Measurement
High-frequency power measurements can now be carried out with 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 and is particularly suitable for measuring high-frequency switching losses in switched-mode power supplies. It also provides 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 d.c./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.
For more information contact Trevor Grundlingh, Protea Electronics, +27 (0)11 719 5700, [email protected], www.protea.co.za
Further reading:
Rapid IoT prototyping simplified
Future Electronics
Test & Measurement
The STEVAL-MKBOXPRO from STMicroelectronics is a compact, ready-to-use wireless development kit designed to accelerate the creation of intelligent IoT and wearable applications.
Read more...
High speed precision digital multimeters
Vepac Electronics
Test & Measurement
Siglent Technologies has expanded its precision measurement portfolio with the SDM4000A Series digital multimeters, delivering a powerful combination of speed, accuracy, and usability for modern automated test environments.
Read more...
Non-contact linear position sensor
Electrocomp
Test & Measurement
The Vishay 40 LHE Linear Position Sensor, designed for industrial motion control and automation, delivers robust, non-contact measurement performance using Hall effect technology.
Read more...
Real-time monitoring for smart power distribution
CST Electronics
Test & Measurement
By leveraging high-precision measurement, high-speed wave-recording, and AI-enabled analytics, the InHand Wireless Overhead-lines System empowers power utilities to accurately identify line faults and perform comprehensive load analysis.
Read more...
Compact vector network analyser
Vepac Electronics
Test & Measurement
Siglent Technologies has introduced the SNA5000X-E Vector Network Analyzer, a compact, cost-effective solution engineered to meet essential RF testing needs, while maintaining dependable performance.
Read more...
Smart digital fibre sensor
Avnet Abacus
Test & Measurement
Panasonic Industry Europe has introduced the new FX-250 digital fibre sensor designed to support users in their daily working routines as effectively as possible.
Read more...
Compact USB spectrum analyser solution
Vepac Electronics
Test & Measurement
The HAROGIC SAN Series USB Spectrum Analyser is a compact USB-based spectrum analyser and receiver that covers a broad frequency range from 9 kHz up to 9 GHz.
Read more...
B&K Precision’s Series 1820B frequency counter
Comtest
Test & Measurement
These compact and versatile instruments are designed for a wide range of frequency measurement applications, from telecommunications to verification and validation of oscillators.
Read more...
How transition-edge sensors detect microwave radiation
Test & Measurement
The elegant interplay of superconductivity, thermal physics, and precision electronics makes TES technology a cornerstone of modern low-energy photon detection.
Read more...
Compact high precision magnetometer
Future Electronics
Test & Measurement
Bosch Sensortec has introduced the BMM350, a compact 16-bit, 3-axis magnetometer engineered to deliver high accuracy, low noise, and exceptional energy efficiency in space constrained designs.
Read more...
printer friendly version