i am using just one of the two nessiedvb tuners which is directly connected to one of four 2 in 1 diseqc switches. To the diseqc switches there are two quad LNBs (with integrated switching) connected. The two LNBs are from different vendors (Fuba and Sharp). I don't use loop trough mode - only one cable is connected to tuner 2. Input 1 is Astra 23,5 and Input 2 is Astra 19,2. In DLNA mode scanning channels on both satellites works correctly.