The CMAD (Common Mode Absorption Device) is specified in CISPR 16-1-4 and its use is defined in CISPR 16-2-3 and CISPR 11 edition 6.0. It improves the asymmetrical line termination in the frequency range 30 MHz to 200 MHz and improves measurement reproducibility. The CMAD needs to be clipped on lines leaving the test area. No more than three CMADs should be used for one setup.