Planning and implementation of EMC test system requires a lot of expertise and experience, well configured EMC test system can be the fastest way to the right measurements and can be adapted to the customer's special needs, for the task in hand to provide customers with the best solution.
5, EMC test methods
As mentioned earlier, since 1996, all electrical products can enter the European **** body market only after the CE marking, and the prerequisite for obtaining this mark of conformity is the fulfillment of the relevant EMC standards.
Depending on whether the device under test is a general device or a radio transmitting device, there are different EMC test methods, and in the first case it is important to have a full range of EMI and EMS standards. The simplest situation is: readily available with a full range of standards, the manufacturer or EEA importer authorized to conduct their own prescribed EMC test, and then affixed with the CE mark, if the standard is not complete, it is necessary to ask the ability to have the agency to test. If it is a radio device, it needs an authoritative third party to conduct a prototype test, qualified before affixing the CE mark.
In short, EMC authorities are giving manufacturers and importers more possibilities than before to obtain their own EMC conformity certificates, which are recognized throughout the European market.
In China, for mandatory programs, products must be tested and certified by a third party to obtain the CCC certification mark. For non-mandatory items, manufacturers can test their own products to see if they meet the EMC standard requirements
1. electromagnetic environment
Existing in a given place the sum of all electromagnetic phenomena.
2. electromagnetic noise electromagnetic noise
A time-varying electromagnetic phenomenon that apparently does not transmit information, which may be superimposed or combined with useful signals.
3. unwanted signal,undesired signal
A signal that may impair the reception of a useful signal.
4. interfering signal interfering signal
A signal that impairs the reception of a useful signal.
5. electromagnetic disturbance
Any electromagnetic phenomenon that may cause a reduction in the performance of a device, equipment or system, or that may have a detrimental effect on living or non-living material.
Note: Electromagnetic disturbance may be electromagnetic noise, unwanted signals, or changes in the propagation medium itself.
6. electromagnetic interference (EMI)
Degradation of the performance of equipment, transmission channels or systems caused by electromagnetic interference.
7. electromagnetic compatibility electromagnetic compatibility (EMC)
Equipment or system in its electromagnetic environment can work normally and does not constitute an intolerable electromagnetic harassment of anything in the environment.
8. (electromagnetic) emission
The phenomenon of emitting electromagnetic energy from a source.
9. emission (in radio communication )
The phenomenon of radio waves or signals being generated by a radio transmitter and emitted outward.
10.(electromagnetic)radiation
The phenomenon of energy being emitted from a source into space in the form of electromagnetic waves.
The propagation of energy through space in the form of electromagnetic waves.
Note: The meaning of the term "electromagnetic radiation" is sometimes extended to include the phenomenon of electromagnetic induction.
11. radio environment radio environment
Radio frequency range of the electromagnetic environment
In a given place all the radio transmitters are in the working state of the electromagnetic field produced by the sum.
12. radio (frequency) noise radio (frequency) noise
Electromagnetic noise with radio frequency components.
13. radio (frequency) disturbance radio (frequency) disturbance
Electromagnetic harassment with radio frequency component.
14. radio frequency interference (RFI)
Decrease in useful signal reception performance caused by radio interference.
15. inter-system interference inter-system interference
Electromagnetic interference caused by other systems of electromagnetic harassment of a system.
16. intra-system interference intra-system interference
Electromagnetic interference in the system caused by electromagnetic interference within the system.
17. natural noise natural noise
Originally from natural phenomena rather than artificial devices generated electromagnetic noise.
18. man-made noise man-made noise
Electromagnetic noise from artificial devices.
19. degradation (of performance)
An undesired deviation from normal performance of a device, equipment, or system.
20.(to a disturbance) immunity(to a disturbance)
The ability of a device, equipment or system to face electromagnetic disturbances without degradation of operational performance.
21. (Electromagnetic) susceptibility (electromagnetic) susceptibility
In the presence of electromagnetic harassment, the ability of a device, equipment or system to avoid degradation of performance.
Note: High sensitivity, low immunity.
22. electrostatic discharge electrostatic discharge (ESD)
The transfer of charge caused by the proximity of objects with different electrostatic potentials to each other or by direct contact.
23. (time-varying) level (of time varying quantity)
The average or weighted value of a time-varying quantity, such as a power or field parameter, obtained in a specified manner and at specified intervals.
24. limit of disturbance
The maximum permissible level of electromagnetic disturbance corresponding to a specified measurement method.
25. limit of interference
Electromagnetic harassment that reduces the maximum permissible performance of a device, equipment or system.
26. (Electromagnetic) compatibility level (electromagnetic) compatibility level
Maximum level of electromagnetic interference expected to be added to a device, equipment or system operating under specified conditions.
27. emission level (of a disturbance source)
The level of a given electromagnetic disturbance emitted by a given device, equipment, or system measured by a specified method.
28. emission limit (from a disturbance source)
The maximum emission level of a given source of electromagnetic disturbance.
29. immunity level immunity level
The maximum level at which a given electromagnetic nuisance is applied to a device, equipment, or system while it is still functioning properly and maintaining the required level of performance.
30. immunity limit immunity limit
Specified minimum immunity level.
31. immunity margin immunity margin
Difference between the immunity limit of the device, equipment or system and the electromagnetic compatibility level.
32. (Electromagnetic) compatibility margin
The difference between the immunity limit of a device, equipment or system and the emission limit of a nuisance source.
33. disturbance suppression
Measures to weaken or eliminate harassment.
34. interference suppression interference suppression
Weakening or elimination of interference measures.
35.emission margin emission margin
Difference between the electromagnetic compatibility level of the device, equipment or system and the emission limit.
36. transient (adjective and noun)
Physical quantities and physical phenomena that change between two adjacent stable states for a period of time less than the time scale of interest.
37. pulse
A physical quantity that changes abruptly for a short period of time and then quickly returns to its initial value.
38. impulse impulse
An impulse that approximates a unit pulse or Dirac function for a given purpose.
39. spike
A unidirectional pulse of short duration.
40. rise time (of a pulse)
The time it takes for the instantaneous value of a pulse to rise for the first time from a given lower value to a given upper value.
41. rate of rise
The average rate of change of a quantity over time within a specified range of values, i.e., from 10% to 90% of the peak value.
42. burst (of pulses or oscillations)
A limited number of clear pulses or an oscillation of limited duration.
43. impulsive noise
Noise that appears as a series of distinct pulses or transients on a particular device.
44. impulsive disturbance impulsive disturbance
Electromagnetic disturbance that occurs in a particular device or equipment and manifests itself as a series of clear pulses or transients.
45. continuous noise
Noise in which the effects of a particular device cannot be broken down into a clearly identifiable sequence of effects.
46. continuous disturbance continuous disturbance
Electromagnetic disturbance in which the effects of a particular device cannot be broken down into a series of clearly identifiable pulses.
47. mains-borne disturbance
Electromagnetic disturbance transmitted to a device via the power supply line.
48. mains immunity mains immunity
The immunity to power disturbances.
49. mains decoupling factor mains decoupling factor
Applied to the power supply in a specified position of the voltage applied to the specified input of the device and the same nuisance effect on the device of the ratio of the voltage value.
50. cabinet radiation
Radiation generated by the enclosure of a device, excluding radiation from connected antennas or cables.
51. internal immunity internal immunity
Device, equipment or system in the presence of electromagnetic harassment of its conventional inputs or antennas can work normally without performance degradation.
52. coupling factor coupling factor
Given a circuit, electromagnetic quantities (usually voltage or current) from a specified position coupled to another specified position, the target position and the source position of the corresponding electromagnetic quantities of the ratio is the coupling factor.
53. coupling path
Part or all of the electromagnetic energy from a specified transmission to another circuit or device through the path.
54. shield screen
Measure used to minimize the penetration of a field into a specified area.
55.electromagnetic screen
Shielding that reduces the penetration of alternating electromagnetic fields into a specified area using conductive materials.
56. reference impedance reference impedance
Used to calculate or measure the electromagnetic interference generated by the equipment, with a specified value of the impedance.
57.ISM (approved) equipment ISM (qualified equipment)