5M EMC Chamber

Performance requirements
1, shielding performance

2、Quiet Zone Normalized Site Attenuation (NSA):5m test distance, 3m dead zone (3m diameter, 2m high) and 3m test distance, 2m dead zone (2m diameter, 2m high) case test. From 30 MHz to 1 GHz in accordance with ANSI C63.4-2003 standard test, the actual NSA and the theoretical NSA compared to no more than ± 3.5 dB.
 3、Quiet zone transmission loss: 1GHz-18GHz using transmission loss (TL) test method to test, in the 3m test distance, 2m dead zone (2m diameter, 2m high) case test; TL value is not greater than ± 3.5dB.

4, the site voltage standing wave ratio: from 1GHz - 18 GHz in accordance with CISPR16-1-4 ED2 2006 and CISPR / A / 710 FDIS, diameter 3m, 2m high cylinder static zone, the test distance of 5m, two height, two Polarization direction field voltage standing wave ratio is better than 6dB.
  5, the field uniformity: in accordance with the latest version of IEC 61000-4-3 test, from 26MHz-18GHz frequency range of 16 test points in the 12 points of the uniformity of 0 ~ +6 dB, the standard field for the turntable 0.8m-2.3m in the range of 1.5mx 1.5m vertical plane.
  6, the background noise: dark room space environment background noise (dark room turntable, antenna lift tower, lights and TV monitors and other equipment to open the state) test level than in the 30MHz ~ 1GHz frequency range EN55022, GB9254 standard The prescribed limit.

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