I'm a little (no a lot) confused about the
type of LNB's to use for the satellite antennas out there. Is a LNB for DISH different than one for
DirecTV or FTA? I currently am trying to get 148 W using a Direct TV dish. Why isn't it working

It works for 121 W. Also what exactly is a Universal LNB, and should (and can) I use it for 61.5, 110, 119, 121, 148. We should have some kind of matrix of what to use for a specific satellite.
I'm also confused

about
RHCP/LHCP (right/left hand circular polarization) vs. Vertical/Horsontal Polarization. Are they the same? LNB FREQ is also a mystery. Does anyone know the
LNB Freq for a Direct TV LNB? Since there are so many Direct TV and DISH dishes lying around at flea markets and stuff. Looks like we should be able to use them for everything. Am I wrong? Why.