Based on what your saying it seems your getting a signal level that's appropriate for both units. You may consider adding a Zinwell switch for more sets later. This should be provided free to you for adding the additonal sets. The new AT-9 or Slimline will work on new HD receivers and legacy receivers.Rentadog said:I would like to run both a HD DVR & a Std Resolution DVR off the same satellite dish. I am currently running a Hughes HDVR2 & a Std Receiver using a signal splitter/switch with a signal strenght in the high 90's at both the primiary & secondary locations. This arrangement provides two cables to each unit. To accomodate the HR20 as well as the HDVR2 is there any special switching needed or will the current arrangement suffice?