Ok, Dish 101....
Domes can see one satellite at a time, And since Dish changed some programming not all domes will lock on their birds any more.
DISH 1000.x type antennas however can see all three DISH satellites at the same time, and thus you get full programming and if you have multiple receivers, or a dual channel DVR. you will have JOY (Domes only work with a single receiver)
You can get 'em in both Portable (Tripod) and roof mounted (Automatic) make sure the controller knows the new dish protocol.
If you want a PORTABLE auto-dome go with Winegard Pathfinder X2 (the bigger the antenna the better the antenna) as it not only does western arc, but eastern as well if you know how to program it.
Also portable.. Where I am (nearest tree over 200 yards) they are added work over a roof mount.. Where I want to be righ now (under the evil signal eating tree) they work very well cause they can be set up some distance from the RV.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times