SGS-CSTC Guangzhou has built the first commercial 10m long semi-anechoic chamber in China to provide accurate and internationally recognised EMC testing services for ITE/RF/ISM manufacturers
Starting from September 2006, the newly built facility provides strong support for SGS's CE/EMC, CE/R+TTE, FCC, VCCI, Canadian IC and C-tick testing and SGS EMC certification services.
Radiated disturbance tests.
EMC field strength measurements of radiated disturbance caused by electrical products have to be conducted on sites that allow no reflection of radio waves except for those produced by the reference ground plane.
A semi-anechoic chamber is a test site with radio wave absorbing materials installed on the walls and ceiling in order to have the same effectiveness as an open air test site.
Because of high costs, most laboratories have only built 3m long semi-anechoic chambers, even though the standard distance for radiated disturbance measurements is 10m.
Measurements in 3m chambers are accepted as a substitute but in case of a dispute results obtained in a 10m chamber are more trusted when testing ITE/RF and ISM products.
