The calibration of an EMI analyzer happens to be one of the most significant processes in electromagnetic compatibility laboratories and particularly, high sensitivity EMC, where even the slightest error in measurements influences the compliance determination. Engineers use accurate measurements to determine the level of interference, source of emission and to determine the performance of a produ...
1 Introduction In power transmission and electronic equipment applications, the flame retardancy of wires and cables is a key barrier to preventing fire accidents. If the flame retardancy of cables is not up to standard, once a short circuit, overload, or aging occurs, it is likely to cause flame spread, release toxic smoke and high-temperature droplets, resulting in serious casualties and propert...
The need to obtain an electromagnetic compatibility has now become a fundamental need in virtually all electronic devices, and such need has also made the need to have an accurate EMI test receiver system very pertinent. The current EMC testing systems use special receivers to identify, measure and process undesired electromagnetic disturbances. These are disturbances which are not always noticeab...
1. Introduction With the rapid iteration of the electronic information industry, the complexity and integration of electronic products continue to improve, placing more stringent requirements on core indicators such as accuracy, bandwidth, and sampling rate of electrical signal measurement instruments. As a key device that converts analog electrical signals into digital signals for processing and ...
1. Introduction In scenarios such as electronic equipment R&D, military classified system testing, and precision instrument calibration, low-frequency magnetic field interference (typically referring to magnetic fields below 30Hz) can seriously affect equipment performance and test accuracy. For example, when an oscilloscope measures weak electrical signals, external low-frequency magnetic fie...
The modern electronic devices use the environment abundant in the electromagnetic energy, and the reaction to such fields is somehow observed in each circuit, cable or component. It is against this reason that the manufacturers must make sure that their designs do not produce an adverse interference and are robust enough to confront external inhibitions. This EMI compliance testing guide gives a f...
1. Introduction Throughout the entire life cycle of electrical equipment, leakage current is a key indicator for measuring insulation performance and safety level. In accordance with national and international standards such as GB 4706.1 “Safety of household and similar electrical appliances – Part 1: General requirements” and IEC 60335-1, the leakage current of various electrica...
I. Introduction With the increasing popularity of electronic devices, electromagnetic disturbance has become a critical factor affecting the operational stability and safety of equipment. Among them, disturbance voltages generated by wired network interfaces (such as Ethernet interfaces, USB interfaces) and ELV (Extra Low Voltage) lamp interfaces (such as LED strip control interfaces) are directly...
Modern wireless equipment relies on a high level of performance of the antenna to ensure constant communications, precise data transmission, and general durability of the equipment. Since products are incorporating Bluetooth, WiFi, GPS, 5G modules and many RF systems in compact formulations, engineers must still make sure that the antennas are effective and are not emitting unnecessary noise. In t...
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