With a DPP33 switch? I think several folks missed the correction Matt added to his OP. He has a 1000.2 so he has 3 outputs already
as I stated above. Plus he's not asking for a 4th connection as yet.
All 3 1000.2 outputs must be used if connecting it up to a switch. As Ed said, there is no point in adding a DPP33, which has no more outputs than the 1000.2. A DPP44, on the other hand, would allow a 4th receiver
and additional cascaded switches. Is that what you (KAB) meant to say? I personally find the DPP44 entirely unaffordable and have a DP34 cascaded with a DPP33 instead. (That gives me 4 single-tuner outputs and 3 dual-tuner outputs for half the price of a DPP44.)