Hello Andreas, thanks for your help ! It works after i reimplemented the functions for setup the TUA6100 in my current kernel stv0299.c . But some modifications to parameters must be done to get it stable and the BER down. Up to now i have good stability and low BER only with high symbolrates ( i live in Southamerica an receive mostly in C-Band DW-TV) some problems with low symbolrates exist. If i have solution for this i will inform you. Thanks for helping regards Harald