Assuming the Dish receiver you're getting is DP compatible, that's it.
One question - why not just go buy a Dish 500? It'll be just about as easy to install and makes 2 satellites available.
OR, if this is for a 3rd satellite being added to a Dish 500 system, then you'll need to get a switch - either DP21(s) or DP34 depending on the number of receivers. If the 3rd satellite is to get your locals, I believe Dish will come out and do that for you.
Yeah, this is a third dish. I'm running a dishpro 500 system for 110 and 119. I'm trying to get 61.5. I have a dp21 switch because I only have one receiver. Someone told me I could use my dtv dish as is for 61.5, but I'm beginning to think that's only if you're a legacy user. When I hooked up my dtv dish as is and ran a check switch, I got NC (no connection;no satellite feed).