After years of bringing my receivers (H21-200) to my camper and setting up my dish myself, this time I am getting a Directv code of 775 (receiver not communicating with dish) my satellite meter squeals, I have checked all coaxials for continuity repeatedly, Directv tells me that I NEED a SWM!! Is this something new?? My home doesn’t have 1 (she repeatedly told me that it does, but I know the set up and it doesn’t!!! Since the meter squeals, I assume the LNB is good!! I do not have any DVRs and my other box that I haven’t messed with because it’s new H24-100. Again this something new??? What do I do next??