My current setup is 1 dish 500 with a dual lnb 110&119 and another dish 500 with a single ln pointed at 61.5. I am borrowing the LN from a friend who wants it back. I have an extra dual LNB in my attic not being used. Can I hook up one side of that LNB and use it for 61.5? I don't know if there is a difference between an LNB and an LN just know it says 2 different things on them? Thanks