If I got the DECA set-up,I'd need 3 DECA adaptors. I'd also need to be sure that the SWM filter came with the packaging. From what I've read,the set up seems pretty straight forward. I'd have to move my SWM power adaptor to before my SWM 2-way splitter. The installer went cable from the Dish to the splitter & then the power adaptor before my HD DVR receiver(& that is after a flat cable through my window). It works,but I'm depending a lot on the flat cable to allow the power to flow from the adaptor back to the splitter & to my other HD DVR receiver.