Does proper Grounding Satellite Dish & RG6 Cable, increase signal Quality?

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  • kalpesh
    Newbie
    • Jan 2010
    • 9

    #1

    Does proper Grounding Satellite Dish & RG6 Cable, increase signal Quality?

    Last year I was able to catch Echostar 3 (61.5W) good quality signals on my 36" dish with DBS/Circular Dual LNBF
    (I.F: 12.2~12.7Ghz, L.O: 11.25Ghz) using ViewSat 2000 Ultra.

    I tried all the way, but I can get 75% signal quality & it is blinking & not showing Green with Satellite name.

    My question:
    Does proper Grounding Satellite Dish & RG6 Cable, increase signal Quality?

    How to do proper Grounding as I am leaving on Apartment on 3rd floor?


    Thnaks.
  • chroma
    V.I.P. Member
    • Feb 2009
    • 1976

    #2
    I dont really understand the question.
    Im trying to figure out if your discussing Ground Plane theory or Common Ground.

    Either way the answer to both is the same, neither will increase gain from a parabolic/cassegrain/gregorian dish.

    Common grounding, or earthing your gear is only to avoid the complications due to lightning strikes, ie it will prevent gear getting fried and fires in your home.

    Ground planes are only used for radio antennas that are operating on lower frequencies like radio waves and are used on conventional antennas like dipoles, yagis, multibands and log periodics.
    All of these recieve and radiate at the same frequency of the drop feed and equipment. And the frequencies they operate on behave far different from the frequencies that satellites operate on. The radio waves defraction, refraction, relection and propagation patterns vary at different frequencies and groundplanes are used to control this phenomenon.

    Satellite dishes dont work like this, they reflect small wavelength radiation into a feedhorn and because of the way physics works, need to drop the frequency down to enable it to be transported down the dropfeed to the equipment. (this is in effect what an LNB does)
    The initial wavelength would only make it at most 2 feet down a wire before it disperses entirely, so the lnb drops the frequency down to a usable frequency for transport.
    High frequency short wavelength dont refract, defract or propagate to anywhere near the same degree as lower frequencies negating the need for a groundplane.

    The only way to get more gain is to attatch either a bigger dish or make an array of matched little ones.
    He who laughs last thinks slowest.

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