I designed this small assembly so that an old LNB (9.75/10.75 -14/18V) + mechanical polarotor can be recognized by the sf8008 as a universal LNB with OL 9.75/10.75 instead of 9.75/10.6.
It works very well, you have to adjust the two polar values at each satellite position.
here is the schematic
if someone can gives me advice about L2 L3 C7 values .
i dont have active splitter or opened devices to see similar values .
when sf8008 send 22k (high band) , 22k is detect in posi and send 18V to L3 .
when there is no 22k signal posi send 13V to L3.
sf8008 send also 14/18v ,posi use this to manage polarotor (no change to L3).