In article icHoe.9607$U_2.1496@trnddc06, "Jerry Martes"
wrote:

My question relates to my wondering if the TV satellite dish is a parabola
with the horn feed offset away from the focal point.

Jerry-

I understand there is a class of unsymmetric antenna where the feed is
actually at the focal point, but the reflecting surface is only a side
section of the whole parabola. Although it is physically "offset", it
functions as a parabolic antenna.

Fred