You need to replace your dish with the 5-LNB dish. This is larger, and can be a challenge to align, especially if you don't have a signal meter.
If you ordered the HR20 from DirecTV, they would provide the dish and send an installer. You might call and see if you can arrange the dish upgrade and installation anyway.
To your last question, yes, you can continue to use the existing dish and get the SD programming you were getting before.
Carl
If you ordered the HR20 from DirecTV, they would provide the dish and send an installer. You might call and see if you can arrange the dish upgrade and installation anyway.
To your last question, yes, you can continue to use the existing dish and get the SD programming you were getting before.
Carl