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All
satellite dishes are designed to point up to the sky. Even
when the dish is seemingly 90 degrees to the ground it is
still looking up. To properly aim the beam you will need to
point the dish down [Fig. 7]. If you are on a hill you will
need to point down even more.
Fig. 7 Dish 500 fitted with WiFi
antenna looking down
Now
it's only a matter of fine tunning the position of the dish.
Using a free tool like Netstumbler
is a good way to aim your dish properly. Once you lock the
maximum signal tighten the screws on the dish and rotate the
antenna 90 degrees. One of the two polarization positions
will give you stronger reception.
Securing
the dish with bricks like I'm doing in this picture is a very
bad idea. Winds can easily knock the dish down or lift it
off your roof. Use something heavy to hold the dish down while
locating a good spot to place it. Once you find the spot mount
the dish permanently with heavy screws.
Finally,
there may be regulations determining maximum signal strength
for 2.4GHz frequency in your country. In the United States
FCC regulates such matters. You can find out official FCC
information here.
It is not likely that FCC would take any action unless they
receive interference complaints from people or business in
your signal path. Also, this setup is fairly limited and without
powerfull amplification you will probably not bother anyone.
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