描述:
CISPR 22, 1197 Amendment #1 2000-08, radiated emissions testing of information technology equipment, requires that all cables leaving the EUT for connection to auxiliary equipment outside the test site shall be filtered with a ferrite decoupling clamp placed on the cables at the point where the cables exit the test site. F-201-DCN-32mm Test Setup shows a typical test set-up for table-top equipment taking particular detail to show the location of ferrite decoupling clamp.
The clamp-on types include the F-201-DCN-23mm and the F-201-DCN-32mm. Shown below is the attenuation versus frequency characteristics of each device calibrated in a 50Ω system The attenuation curve of each device is shown in relation to the minimum performance required by EN 55022.