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absorbtion
Absorption attenuation with and without silicone seal, base data
Some basic data of the diagram aboce:
Average attenuation:
19 dB without EMC seal
41 dB with EMC seal
The average attenuation is a measurement of the enclosure's average attenuation of electromagnetic radiation in the measured frequency range (here 30 MHz up to 1 GHz)
A high value indicates a generally good attenuation for all frequencies, a low value indicates that the attenuation generally poor, or that an efficient attenuation is achieved only for frequency ranges.
Average tolerance:
10 dB without EMC seal
7 dB with EMC seal
The average tolerance is a measurement of the average fluctuation between the "average attenuation" and the absolute value for the measured frequency range. The higher the value the fluctuation. A higher value indicates a discontinuous attenuation behaviour, a low value an continuous attenuation nehaviour.
Maximum attenuation:
35 dB without EMC seal
53 dB with EMC seal
Maximum attenuation of electromagnetic radiation for a frequency.
Minimum attenuation:
0 dB without EMC seal
23 dB with EMC seal
The minimum attenuation indicates worst-case attenuation behaviour of an enclosure.
The minimum attenuation can also be described as "garanteed attenuation".
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