| DecascadeLeft2P2PT(SParamDataAndNoiseParamDataT, SParamDataAndNoiseParamDataT) | Decascades 2-Port a from the left side of 2-Port ab |
| DecascadeLeft2P2PT(SParamDataAndNoiseParamDataT, SParamDataAndNoiseParamDataT, SParamDataT) | Decascades 2-Port a from the left side of 2-Port ab using known S-Parameters of b |