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Editorial Team - EMC Directory
What is Open Area Test Site?The Open Area Test Site (OATS) is a flat piece of land, free of obstructions, away from any and all external signals, with a perfectly reflective surface. OATS is used for EMC and emissions testing for large machines. If EMC measurement are done in a room or an enclosed area, it is possible that reflections or scattered signals from walls, floor and ceiling can tamper t...read more
Editorial Team - EMC Directory
What is Magnetic Field Testing?Magnetic field testing determines whether a system is immune and able to operate as intended when subjected to a magnetic field. All electric currents have magnetic fields. In AC, when the magnitude or direction of the current changes (both likely to happen every time), its magnetic field also changes, and a changing magnetic field can induce unwanted currents in nea...read more
Editorial Team - EMC Directory
ESD testing is conducted to check the quality of the operation of an Equipment Under Test (EUT) when subjected to an electrostatic discharge. This testing is used to check the performance of the EUT for personnel static charges as well as indirect charges i.e. static charge from personnel to EUT through some other object in its proximity. Personnel handling the devices carry static charges of some...read more
Editorial Team - EMC Directory
Voltage drop testing is a method of diagnosis to locate high resistance problems in a circuit. This testing helps ensure that the equipment can function properly (as expected and safely) even during power supply fluctuations. Sudden voltage dropouts or dips can result in rise in temperature, vibrations, or even shocks to the equipment under test (EUT). Along with voltage drops, this type of testin...read more
Editorial Team - EMC Directory
The IEC 61000-3-2 is an EMC standard by the International Electrotechnical Commission on limits for harmonic current emissions applicable to electrical and electronic equipment having an input current up to and including 16 A per phase and intended to be connected to public low-voltage distribution systems. This standard specifies the test procedures, limits, and requirements for emissions caused ...read more
Editorial Team - EMC Directory
Conducted immunity refers to the device’s ability to resist unwanted RF voltages and currents that get coupled to the external wires and cables. These coupled RF voltages and currents are nothing but unwanted noise that could hamper the intended functions of the device.What is Conducted Immunity Testing?Conducted immunity testing is used to determine whether the Equipment Under Test (EUT) ha...read more
Editorial Team - EMC Directory
EFT Immunity is the ability of an electronic/electrical device to withstand the interference of electrical fast transients (EFTs). EFTs are generally high-frequency pulses caused by sparking or arcing. The sparks occur during circuit connection or disconnection from a power supply, switchgear operation, or when lines touch each other. The EFT pulse can be filtered easily but it becomes rather diff...read more
Editorial Team - EMC Directory
What is Surge Immunity?The ability of electronic/electrical devices to withstand the sudden current and/or voltage surge from power lines is surge immunity. Indirect lightning strikes, routine power switching events, insulation faults, switching of reactive loads, etc. cause a sudden surge in the AC power lines. These sudden surges cause electrical, thermal, and/or energy overstress. The surges oc...read more
Editorial Team - EMC Directory
Radiated Immunity:Radiated Immunity is a characteristic of a device to withstand external electromagnetic interference and continue to operate normally as intended. A device can malfunction when subjected to Stray EMI radiations generated by nearby devices thus it must remain immune to such radiations to function normally. For example, a laptop connected to a local Wi-Fi should function smoothly i...read more
Editorial Team - EMC Directory
Conducted emissions are the electromagnetic radiations generated by a device that gets transferred to its subcircuit or another device via cabling, PCB traces, power/ground planes, or parasitic capacitance. The conducted emission appearing on the interface and power cables must be kept low or they can propagate through cables and reach other devices causing problems in their intended operations. C...read more
Editorial Team - EMC Directory
The IEC 61000-3-3 is an EMC standard by the International Electrotechnical Commission on the limitations of voltage fluctuations and flicker impressed on the public low-voltage system. It specifies conditions, procedures, and limits of voltage changes that may be produced by equipment under test (EUT). This standard applies to electrical and electronic equipment having an input current up to and i...read more
Editorial Team - EMC Directory
Radiated emissions testing is the measurement of the electromagnetic emissions that are intentionally and unintentionally generated by the equipment under test (EUT). This test is one of the EMC family's most common and essential tests. Not all but most electronic devices emit electromagnetic radiations unintentionally. These radiations often create hindrance in the operations of other devices...read more
Editorial Team - EMC Directory
The CISPR 32 is an EMC standard for Multimedia Equipment (MME) in the supply range from 0 to 600 V AC/DC. This standard focuses to establish requirements that protect the radio spectrum from the interference of MME, allowing radio services to operate as intended in the frequency range from 9 kHz to 400 GHz. CISPR 32 also specifies procedures to ensure the reproducibility of measurements and consis...read more
Editorial Team - EMC Directory
The IEC 61000-4-6 is an EMC standard by the International Electrotechnical Commission for induced disturbances caused by electromagnetic fields coming from intentional radio frequency (RF) transmitters in the frequency range of 150 kHz to 80 MHz. This conducted RF is nothing but the unwanted noise in the form of voltages and currents carried by its external wires and cables. The main aim of this s...read more
Editorial Team - EMC Directory
The IEC 61000-4-4 is an EMC standard by the International Electrotechnical Commission for the immunity requirements of electrical and electronic equipment to repetitive electrical fast transients. This standard specifies the limits, requirements, and procedures to evaluate the performance of the Equipment Under Test (EUT) when exposed to repetitive fast transients (bursts) on supply, signal, and c...read more
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