I have a small RV trailer and subscribe to Absolute w/locals only. My locals and most of the HD channels that I get are on the 61.5 satillite. When I hook my 722 up to a single lnb dish, the receiver will not give me the sat location for aligning the dish to 61.5. The 722 set up shows locations for 110 and 119, but 61.5 is marked n/a. How do I hook up my 722 to find 61.5 with a singler lnb?