IEC 61000-4-3-2020 pdf free.Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement techniques – Radiated, radio-frequency electromagnetic field immunity test.
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60050-161, International Electrotechnical Vocabulary (1EV) — Part 161: Electromagnetic compatibility (available at www.electropedia.org)
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-161 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://wwwelectropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1 amplitude modulation AM modulation in which the amplitude of a periodic carrier is a given function, generally linear, of the instantaneous values of the modulating signal
(SOURCE: IEC 60050-702:2016, 702-06-1 7J
3.1.2 anechoic chamber shielded enclosure which is lined with radio-frequency absorbers to reduce reflections from the internal surfaces
3.1.3 fuIy anechoic chamber shielded enclosure whose internal surfaces are totally lined with anechoic material
3.1.4 semi-anechoic chamber shielded enclosure in which all surfaces except the metal floor are covered with material that absorbs electromagnetic energy (Le. RF absorber) in the frequency range of interest
3.1.5 modified semi-anechoic chamber semi-anechoic chamber which has additional absorbers installed on the ground plane
3.1.6 antenna that part of a radio transmitting or receiving system which is designed to provide the required coupling between a transmitter or a receiver and the medium in which the radio wave propagates.
Electronic equipment can, in some manner, be affected by electromagnetic radiation. This radiation is frequently generated by various sources, such as small hand-held radio transceivers, fixed-station radio and television transmitters, vehicle radio transmitters and industrial electromagnetic sources. Many of these services use modulation techniques with a non- constant envelope.
In addition to electromagnetic energy deliberately generated, there is also radiation caused by the operation of devices such as welders, thyristors. fluorescent lights, switches operating inductive loads, etc. Conducted electrical interference is dealt with in other parts of the IEC 61000-4 series. Methods employed to prevent effects from electromagnetic fields will normally also reduce the effects from these sources.
In this document, the electromagnetic environment is characterized by the strength of the electromagnetic field. The field strength is not easily measured without sophisticated instrumentation nor is it easily calculated by classical equations and formulas because of the effect of surrounding structures or the proximity of other equipment that will distort and/or reflect the electromagnetic waves.
5 Test levels and frequency ranges
5.1 Selection of test level
The test levels are given in Table 1.
This document does not suggest that a single test level is applicable over the entire frequency range. The product committees shall select the frequency range(s) to be tested as well as the appropriate test level(s). See Annex E giving guidance for product committees on the selection of test levels.
The test field strength column in Table 1 gives values of the unmodulated carrier signal. For testing of equipment, this carrier signal is amplitude modulated with a 1 kHz sine wave to simulate actual threats (see Figure 1 and Table 2). Details of how the test is performed are given in Clause 8.IEC 61000-4-3 pdf download.