AbstractA generalized model for the satellite link that includes non‐linear effects is presented. The transponder is handled as a black box with nominal gaings. At a specific operating point each signal in the transponder has its own gain,gsci, that may be different fromgs. The parametergscidepends on the operating point of the transponder, the power of the signal and the distribution of the residual transponder power among the other carriers. The intermodulation between the carriers and between them and the up‐link noise is included in the model as well. The generalized model is represented by the conventional traditional equation, modified with correction factors which account for the nonlinear effects. Application of the model to typical transmission plans is given and comparison of the results to field experiments and transponder analysis program is included. Emphasis is placed on the use of the transponder with mixed TV and SCPC operat