I am not certain what kind of dish that I have other than it says Dish HD and a VIP 722K receiver. We have called dish for help because we keep losing half our channels, I think because a tree was blocking them at times. I moved the dish and now I am only getting signal from 72.7 and nothing for 61.5, I used the correct skew, elevation and azimuth settings and I am getting a signal above 50 for 72.7. Any advice is greatly appreciated and thanks in advance.