C/P a bandstacked LNB takes the horizontal polarity frequencies and puts them higher than the vertical (stacking them) and making it vertical
advantage....can use a satellite splitter to run multiple receivers off the dish disadvantage...some receivers dont work with them real well
Dish Network's DishPro system does use bandstacking. There are also C-Band and KU-Band LNB's that are stacked. As example the C-Band takes the horizontal and "shifts" the frequency 600 mhz lower. If you use the "normal" LNB frequency of 5150 all your horizontals will be 600 mhz lower than what they should be.
If your receiver cannot blind scan it properly just take the frequency and subtract it from 24600 and make it vertical. So 12000 H 30000 will become 12600 V 30000