You can't have an HR24 with a Genie 2, assuming you mean the HS17. To answer your question, the system detects both voltages but only uses one. I'm not sure how it actually does it.Thanks Theattguy, here we go!
I've got a system with two receivers, both HR24s with OTA sidecars. The Living Room HR24 has the power inserter. The question is...can I switch out the BEDROOM HR24 with a Genie 2? My concern is that both boxes will be trying to send voltage back to the dish to power the switch and LNBs. FWIW, the two boxes come off a splitter and there is a line on the splitter indicating (to me, at least) that power should pass only from the living room.