To calculate the mixed mode S-parameters of a four-port network, add a Mixed Mode S-parameters global feature and specify port names for each balanced pair. The mixed mode S-parameter calculation requires to perform a parametric sweep with four ports to obtain a full 4 by 4 S-parameter matrix.

Specify Port name for port a in balanced pair 1, Port name for port b in balanced pair 1, Port name for port c in balanced pair 2, and Port name for port d in balanced pair 2. These must be matched to the port names specified in the (lumped) port features of the four-port system.