  Dish az/el positioning: for Fred CU8AO  Hello Fred, your
e-mail bounces,    unknown user:  fredf@clix.pt  Sorri to burden
the rest of the Net.  Hello Fred,  also consider a signal source
that you put in the far field, to verify  antenna performance.
Far field is [ ( 2 times (D squared)) all over lambda], D is the
diameter of the dish. Signals closer than the far field limits
may not give the best test results.  A controlled CW signal
source and controlled polarization  is usually the best.  That
way you can not only check the pointing accuracy but also if the
feed is positioned properly and polarization is correct.
Another method is to look at the depth of the "first null" which
is  usually very sharp, if you can find it.  On either side of
the main lobe is the "first null", then the first sidelobe  then
a null, then the next sidelobe, then another null , etc.  The
nulls may not be detectable due to antenna range (terrain)
imperfections and other reflections.  If no nulls are to be
found, look at the symm