I'm In the process of setting up my new DVBWorld 2104D, DVB S2 USB Box. There are 2 coax connections. One is for the LNB and the other one is labeled "NC". What does "NC" stand for and what is it used for? Is that a fancy name for loop-out? Secondly, I hear that the channel names are not conventionally named, for example Galaxy 19 @ 97.0°W is not named as such but something different. How does one know which Satellite they are trying to lock?