i had dish installed last week and didn't get any of my local hd channels with the voom ota winegard sensar II. The installer did not understand why i wasn't rec'ing my locals. What he did was he diplexed the cable at the both ends: one at the receiver side of the 811 and the other at the dish & antenna side. This will not work!!!!!!!!!!!!!!!!!! YOU NEED TO RUN A SEPARATE COAX CABLE FROM THE ANTENNA STRAIGHT INTO THE RECEIVER AND ALSO U NEED TO BUY WINEGARD PS-9370 TO POWER THE ANTENNA B/C THE VOOM MOTOROLA DSR550 RECEIVER HAD A BUILT-IN AMP OR PS THAT SUPPLY THE POWER TO THE ANTENNA. Now I receiving all my locals in hd; it's coming between 90-100% signal strength. THIS WILL WORK.....I GUARANTEED IT!!!!!!!!!!!