I'm using a new DST3000 with NO dish. With the UHF antenna into ANTENNA IN and Cablevision cable into SAT IN, a channel scan yields OTA digital stations but NO cable digital stations. Reversing the inputs (Cablevision cable into ANTENNA IN and UHF into SAT IN), a channel scan yields the Cablevision digital stations (MSG, FOX sports, and HBO "HD") but NO UHF OTA digital stations. Why aren't all of the digital stations from both connected inputs detected regardless of which line goes to either input? Am I doing something wrong or is my unit defective? Help! Thanks.