We checked whether use of the common mode choke coil has any effect on signal quality.
A Thunderbolt 3 test pattern was output from the DUT, and the signal quality after passing through the CMCC was checked.
Even if a common mode choke coil is used, the signal waveform quality is identical to that before the filter was inserted, and the Thunderbolt 3 compliance test was passed.
Because USB4 also uses the same signal speed (Max. 20 Gbps), the waveform test is expected to be passed.