I bought my 622 and plugged it in place of an 811 and after activated it worked fine. I have a single lnb dish pointing at 61.5 and a dual lnb point at the 110/119. The HD tech support line guy did'nt want to activate it at first saying I need professional install but I told him I have signal from 3 sats and he went ahead and did the activation and all is well. So if your dish setup is like mine was then you can just plug it in and go.