The DPP LNB’s are also in the “Band Stacking” type catagory, but they use the +14 and +18 volt switching, this is because they use the standard lower band setup of 950 to 1450 MHz for all transponder polarities, and use the higher band at 1950 to 2450 for a second set of satellite transponder polarities.
This is for the “Dual” tuner receivers from Dish; tuner input # 2 uses the low band transponders, while tuner input #1 uses the upper band.
The DPP LNB also has an input for a second DP or DPP single satellite LNB.
Diseqc switch settings are the same as the DP type LNBs', port #1 = 119, port #2 = 110, and with the second LNB input port #3 can be used for a second DPP type LNB.
The band stacked LNB has a higher output frequency then the normal LNB, so it requires a better coax, one with a high end frequency response to 2.5 or 3 GHz.
Some FTA receivers have been reported to be having switching problems with this type of LNB, (DPP) if you are having problems with the satellite your watching missing some transponders, then check to see what type of LNB you have.
The photo below will give you an idea if you have this type of LNB or not.
DPP_LNB.gif
Note the two outputs on the left, these will run most receivers with out the requiermet for an external switch, the third connection to the right is for a second DP LNB input.
Diseqc settings are, port #1 = 119, port #2 = 110, port #3 can be for 129 or any other Dish or BEV satellite, but it has to be a DPP type LNB.