Electrical and electronic

Bridging the gap between theoretical simulation and actual hardware implementation remains the greatest challenge in advanced engineering projects. In fields such as radar, 5G/6G, and quantum computing, a lack of synchronization between the design environment and operational hardware often prolongs development timelines

For many factories, downtime is often viewed as an unexpected event that strikes during a production shift. In reality, however, the situation is different. Before a motor fails, a variable frequency drive (VFD) reports an error, or a production line requires an emergency stop, the equipment typically emits multiple warning signals—such as abnormal temperature rises, excessive vibration, degraded power quality, or unstable communication performance. These indicators can persist for days or even months before an actual breakdown occurs

The widespread adoption of wideband semiconductor components such as SiC and GaN in photovoltaic inverters, motor drives, and automotive charging systems has driven the switching frequency and power density of three-phase inverters to unprecedented levels. However, this development has also brought with it severe measurement challenges: high voltages, intense electromagnetic interference, and the requirement for ultra-fast switching signal capture at the nanosecond scale

Is it dangerous to live near a BTS base station? Find out the assessments from the WHO, ICNIRP, Vietnamese regulations, and the actual electromagnetic radiation levels in residential areas.

Set up two multimeters at the same location and their displays may still differ by several volts or a few percentage points. The difference often comes from how each device processes the input signal before converting it into a displayed value.

When using a microscope, turning the focus knob is often considered the decisive step in image quality. If the image is not clear, increasing magnification, adjusting focus or increasing light is a very natural reaction. However, there are cases where images still lack detail and low contrast despite correct measurement operations.

A measured voltage of 220V does not necessarily mean the system is operating stably. When the multimeter display and actual equipment behavior begin to contradict each other, the inspection should be expanded to include load conditions, electrical contact quality, and waveform characteristics rather than repeatedly performing the same voltage measurement.

Understanding the difference between dBm and dB helps ensure optical measurement data is interpreted consistently and prevents incorrect conclusions during system acceptance testing or maintenance.

Optical power meter used together optical light source, can be applied to determine optical fiber link attenuation — a parameter that reflects the overall quality of the fiber optic cabling system

An optical power meter is used to measure the power level of optical signals at a specific point along a fiber optic transmission line. When combined with an optical light source, the optical power meter can also be used to evaluate fiber link loss, verify installation quality, and support troubleshooting activities. With fast measurement capability, ease of use, and reasonable investment costs, optical power meters are widely applied in various fields related to optical transmission systems