This is from the Aldi/Medion forum regarding the SAA7131.

ProgDVB:
choose the '(BDA) 713x BDA DVBS Tuner' from the Device List
I set up MiniDiseqc and for LNB chose Eurobird1 and Astra 2A/2B/2D
I am connected to a communal Sky connection and this gives me a load of BBC and ITV regional varieties ...