MIL-STD-285 - MEASURING THE ELECTROMAGNETIC SHIELDING ATTENUATION
The standard does not give any limits for pass/fail, leaving to the owner of the shielding enclosure to provide these limits.
In addition, although the standard suggests a range of test frequencies that can provide confidence in the effectiveness of the shield, it is clearly stated that the actual test frequencies must be chosen according to a test planapproved by the shield owner, the tester, and the shielding provider/vendor.
The measurement range in this method is divided into three subranges and in each subregion, some subgroups of testing frequencies are suggested:- A low-frequency range, from 9 kHz (50 Hz) to 20 MHz (a single frequency is suggested within 9–16 kHz, 140–160 kHz, and 14–16 MHz) where the SE is defined in terms of magnetic-field performance.
- A resonant range, from 20 to 300 MHz, where the SE is expressed in terms of either electric field or power.
- A high-frequency range from 300 MHz to 18 GHz (100 GHz) (a single frequency is suggested within 300–600 MHz, 600–1000 MHz, 1–2 GHz, 2–4 GHz, 4–8 GHz, and 8–18 GHz) where the shielding performance of the enclosure is expressed in power terms.
Emctest Technologies is a laboratory that performs shielding effectiveness tests on site, directly
to the customer, in Italy and in Europe, or at its headquarters in Rimini - Italy.
We perform shielding effectiveness tests for several sectors:
- private
- industrial
- medical
- nautical
- aviation
- military
Read more about it going back to the home page. Or if you are looking for a lab in order to test your product contact us via email or by phone simply clicking here.
Measurements are made according to customer specifications or in accordance with the main standards currently in use or:
