CISPR 17 Equipment

CISPR 17 describes Methods of measurement of the suppression characteristics of passive EMC filtering devices. The following three methods are mainly applied:

• • Insertion Loss Measurement
• • Impedance Measurement
• • S-Parameter Measurement

Since EMC Suppression Filters do not come with coaxial connections there is a need for suitable measurement equipment to obtain reliable measurements. The international standard CISPR 17 includes several methods and measuring equipment which is useful to compare EMI suppression parts among each other and allows an efficient selection of appropriate EMI suppressor devices. The MIL-STD-220 includes also methods to measure the insertion loss of passive EMI filters.

The following equipment to measure filters and other passive components are available:

• • Transformers 50 Ω
• • Transformers 0.1 Ω / 100 Ω
• • Test Fixtures for wired components in series or shunt connection
• • Test Fixtures for SMD in series or shunt connection
• • Test Adapter for Ferrites
• • Test Boxes for general purpose filters