P r i m a L u c e L a b i S r l
S p i d e r 2 3 0 u s e r m a n u a l
Now observe the parabolic antenna of the radio telescope and, in particular, the feedhorn shadow relative to the
center of the disc. If, as in the image above, it is not perfectly centered (in the picture is slightly shifted towards the
bottom), you need to make an adjustment of the position of the illuminator support moving it in the opposite direc-
tion to the one where the shadow is shifted (in this case then it is necessary to move the illuminator upwards).
!
!
You can do this by slightly moving the 3 or 4 holes plates support (
7
and
8
). Slightly unscrew the 2 screws that secure each plate on the body of
the parabolic antenna and move the plate itself towards the front or the
rear of the parabolic antenna. You can only make a small adjustment
(plates have a slot that allows you to adjust the position of about 1 mm)
but it will suffice for this purpose. Adjust the position of the plates, and
then secure them by tightening the screws again.
!
!
!
Now recorded a new radio image of the Sun and point, as before, the point of maximum emission. When you will
find that (like the picture below) the shadow falls in the center of the parabolic antenna, you'll have perfectly adju-
sted the feedhorn position.
!
!
p a g e
!
5 7
