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Technical Question

  • 15-02-2002 11:21am
    #1
    ShaneOC
    Registered Users, Registered Users 2 Posts: 2,092 ✭✭✭


    What is the difference between a single switched and a twin switched LNB?


Comments

  • #2
    Saruman
    Registered Users, Registered Users 2 Posts: 11,389 ✭✭✭✭Saruman


    Single LNB gets a signal from one satellite and its one signal that cant be split..

    A dual LNB can either splt the signal from a satellite to 2 cables and 2 seperate decoders/recievers.. Or more interestingly be pointed in a different direction to get a signal from another satellite.. This is not perfect though as for isntance you cant have one pointed to 28.8E for sky and another to 19.2E for EuropeOnline.. to far apart.. but for close directions you can.

    Anyone think im wrong? I possibly am but as far as i know thats how it is.


  • #3
    EvilGeorge
    Closed Accounts Posts: 875 ✭✭✭EvilGeorge


    Well done, I was looking for a dual LNB setup but too expensive the standard sky dish cant handle a second one (I'd have to buy a new one) so settled for just 19.2 and big download speeds!


  • #4
    chernobyl
    Closed Accounts Posts: 2,682 ✭✭✭chernobyl


    Originally posted by Saruman

    Or more interestingly be pointed in a different direction to get a signal from another satellite..

    A standard 1M dish has roughly a 3° tollerance left/right of the "sweetspot" but a LNb has about 1° tollerance, so literally yes you could pick up different satellites but in practise they would need to be at the same orbital position.


  • #5
    bmg
    Closed Accounts Posts: 50 ✭✭bmg


    a single lnb operates at one frequency either 9.75ghz or 10ghz this was the old analogue type.
    a universal lnb switches between 2 different sets of frequencys 9.75 and 10.60.
    a twin lnb is really 2 lnbs in one casing operating independently this is for connecting 2 boxes to 1 dish.both boxes receiving the same satellite.
    dual lnb setup is when you have 2 lnbs on the same dish receiving different satellite.


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