I ran a scan with my Fortec Lifetime Ultra on satellites 110 and 119. Most of the channels come up as nagravision, but some came up as Free, yet were unviewable. The signal shows very strong on my receiver on both strength and quality, yet there is no picture. Are there some preview channels that are FTA? NASA channel or GOL tv somewhere on these satellites unencrypted? How does a scan "ALL" vs "ALL+D" differ? Why do I get high quality reading when I am using a linear LNB? Is that why I get no picture?