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Why are the dishes like this?

Discussion in 'Electronic Repair' started by mm, Nov 26, 2007.

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  1. mm

    mm Guest

    I'm in Israel right now, staying in the Armenian quarter of the Old
    City of Jerusalem, and I noticed something odd, afaik, about a couple
    satellite dishes I see on a couple buildings.

    The dishes are about 3 to 4 feet wide, iiac, and there is a rod across
    the front that holds an "antenna" in the focal point, I guess, of the
    concave dish.

    But there are also 2 more antennas, one on the left of center and one
    on the right, about 8 to 10 inches away from center. All three are
    white boxes about 3 inches x 3 x 4. I can understand why they might
    need three antennas, but I don't see how 2 of them can be so far from
    the center. Maybe they're not using the other two, just storing them
    for when the center one breaks? ??
     

  2. They are using three feedhorns to pick up three different satellites
    at the same time. This is a prime focus configuration, and a scaled
    down version of the 'Simulsat' concept.
    http://idyd.com/image/atci/simulsat7_family.gif


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  3. mm

    mm Guest

    I get it. Thanks. And in less than an hour from when i posted!
     

  4. You're welcome.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
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