IEC 61000-4-21: Difference between revisions
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The [[EN]]/[[IEC]] 61000-4-21 standard describes how [[Immunity]] | The [[EN]]/[[IEC]] 61000-4-21 standard describes how [[Immunity]], [[Emission]] and other measurements are performed in a reverberation chamber. | ||
The exact title of this standard is: "IEC 61000-4-21: Electromagnetic compatibility (EMC) - Part 4-21: | The exact title of this standard is: "IEC 61000-4-21: Electromagnetic compatibility (EMC) - Part 4-21: | ||
| Line 9: | Line 9: | ||
Some random remarks and notes: | Some random remarks and notes: | ||
* | * Before a test a 'quick check' chamber performance measurement should be made to ensure that the loading of the chamber is less than the original chamber validation. | ||
* ... | * ... | ||
The field within the chamber is considered uniform if the standard deviation is lower than a predefined value. | |||
{|class="wikitable" | |||
!Frequency range | |||
|below 100 MHz | |||
|100 - 400 MHz | |||
|above 400 MHz | |||
|- | |||
!Accepted standard deviation | |||
|4 dB | |||
|3 dB increasing linearly to 4 dB | |||
|3 dB | |||
|} | |||
The specific measurements are described in several Annexes: | |||
* Annex A: Reverberation chamber overview | |||
* Annex B: Chamber validation for mode-tuned operation | |||
* Annex C: Chamber validation and testing for mode-stirred operation | |||
* Annex D: Radiated immunity tests | |||
* Annex E: Radiated emission measurements | |||
* Annex F: Shielding effectiveness measurements of cable assemblies, cables, connectors, waveguides and passive microwave components | |||
* Annex G: Shielding effectiveness measurements of gaskets and materials | |||
* Annex H: Shielding effectiveness measurements of enclosures | |||
* Annex I: Antenna efficiency measurements | |||
* Annex J: Direct evaluation of reverberation performance using field anisotropy and field inhomogeneity coefficients | |||
* Annex K: Measurement uncertainty for chamber validation - Emission and immunity testing | |||
Latest revision as of 14:59, 5 January 2023
The EN/IEC 61000-4-21 standard describes how Immunity, Emission and other measurements are performed in a reverberation chamber.
The exact title of this standard is: "IEC 61000-4-21: Electromagnetic compatibility (EMC) - Part 4-21: Testing and measurement techniques - Reverberation chamber test methods"
This review is based on the 2011 version.
Some random remarks and notes:
- Before a test a 'quick check' chamber performance measurement should be made to ensure that the loading of the chamber is less than the original chamber validation.
- ...
The field within the chamber is considered uniform if the standard deviation is lower than a predefined value.
| Frequency range | below 100 MHz | 100 - 400 MHz | above 400 MHz |
|---|---|---|---|
| Accepted standard deviation | 4 dB | 3 dB increasing linearly to 4 dB | 3 dB |
The specific measurements are described in several Annexes:
- Annex A: Reverberation chamber overview
- Annex B: Chamber validation for mode-tuned operation
- Annex C: Chamber validation and testing for mode-stirred operation
- Annex D: Radiated immunity tests
- Annex E: Radiated emission measurements
- Annex F: Shielding effectiveness measurements of cable assemblies, cables, connectors, waveguides and passive microwave components
- Annex G: Shielding effectiveness measurements of gaskets and materials
- Annex H: Shielding effectiveness measurements of enclosures
- Annex I: Antenna efficiency measurements
- Annex J: Direct evaluation of reverberation performance using field anisotropy and field inhomogeneity coefficients
- Annex K: Measurement uncertainty for chamber validation - Emission and immunity testing