MICROTEST Will Showcase Power Measurement Solutions at Source India 2026

｜ February 10–11

MICROTEST (E&H) will participate in Source India 2026 – Electronics Supply Chain Portal from February 10 to 11, 2026. The exhibition will be held at Chennai Trade Centre, Chennai, India, and MICROTEST will be exhibiting at Booth C-34A.

This exhibition will focus on power measurement solutions, covering applications from inductors and magnetic components to SMPS power modules. The solutions help engineers, during the design and component selection stages, to verify inductor performance under actual operating current conditions, avoiding efficiency degradation or reliability issues caused by magnetic saturation or excessive temperature rise.
On the power module/system side, the MICROTEST 7140 Power Analyzer uniquely supports high-pass and band-pass filter functions, enabling engineers to accurately evaluate filtering effectiveness at an early stage of power supply design, serving as a first-line auxiliary tool for EMI pre-compliance considerations.

MICROTEST 7140 Power Analyzer Uniquely Supports High-Pass Filter (HPF)

｜Precisely defining measurement bandwidth—HPF assists engineers in making correct efficiency and power factor (PF) judgments

In switching power supply (SMPS) circuits, the Switch Node is the connection point between the main power switch and the energy storage element. It is the node where voltage and current change most aggressively throughout the energy conversion path. The Switch Node is not only the core of energy transfer but also the primary source of electromagnetic interference (EMI) and measurement challenges.

In practical systems, the high-speed switching energy generated at the Switch Node is not confined to a single node. Instead, it propagates through multiple coupling paths—such as DC bus loops, transformer parasitic capacitance, heat sinks, and chassis structures—where it is converted into differential-mode and common-mode noise currents that spread through the power and ground networks. These high-frequency currents eventually flow back to the AC input, superimposing high-frequency noise currents generated by switching actions onto the Line and Neutral conductors that originally carry only 50/60 Hz mains energy.

Such noise currents exhibit characteristics of high di/dt, non-sinusoidal waveforms, pulsed behavior, and wideband frequency spectra. However, most conventional power analyzers / power meters employ only low-pass filters at the front end, with cutoff frequencies and measurement bandwidths mainly covering the fundamental frequency and low-order harmonics. As a result, high-frequency noise and higher-order harmonics generated by fast switching devices are suppressed or attenuated by the front-end filter and do not enter A/D sampling and subsequent calculations. This leads to incomplete spectral information for key parameters such as RMS values and power factor, ultimately causing deviations in input power and other critical measurement results.

Removing Fundamental Interference and Capturing High-Frequency Energy
｜MICROTEST 7140 Power Analyzer – High-Pass Filter

A high-pass filter effectively isolates low-frequency and DC components during measurement, allowing engineers to focus on the high-frequency signal components after filtering. The MICROTEST 7140 Power Analyzer High-Pass Filter allows high-frequency components above selectable cutoff frequencies of 500 Hz / 5 kHz / 100 kHz to pass through, filtering out the fundamental frequency components. This helps engineers more intuitively and quantitatively analyze which high-frequency interference components are superimposed on the input voltage and current.

After removing the 50/60 Hz fundamental and DC components using an appropriate cutoff frequency, the high-pass filter enables:
_  Direct quantification of high-frequency current ripple and voltage spikes caused by PWM switching
_  Analysis of high-frequency energy distribution and EMI generation mechanisms
_  Reduction of measurement distortion caused by large-amplitude low-frequency components

From components to systems, MICROTEST (E&H) delivers complete power measurement solutions. With long-term expertise in electronic measurement, MICROTEST integrates power analyzers and DC Bias current measurement systems for inductors, providing a complete test chain from magnetic components to full power modules. Whether in R&D validation, process introduction, or mass production testing, MICROTEST empowers customers with highly repeatable and reliable measurement data to support sound engineering decisions.

We sincerely invite you to visit the MICROTEST booth and look forward to discussing advanced measurement solutions together as we embrace the future of intelligent and electrified technologies.

MICROTEST Booth No.: C-34A