So you are saying if I don't have a quad LNB then I can take 2 duals and 2 DP Splitters and run them to say....4 311's? and they will all work fine and pass DNS QA's?......... They are the same as a 21 switch?
No. The splitter will work with only a single orbital location. The reason is with multiple orbital slots, there are diseqc commands for LNB control and since a splitter won't process those, you will only see LNB A. The only circumstance this will work is single orbital, multiple tuner/receivers. I do these quite often when we have a Middle Easterner with a 625 and only a 61.5 dish.