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LNB output - Sig strength / Quality

  • 11-08-2009 10:12pm
    #1
    Registered Users, Registered Users 2 Posts: 156 ✭✭


    Hi,

    Should the outputs of a quad LNB have the same Signal Strength Quality ?
    I have aligned my dish and I am getting the following:

    Output 1
    Sig strength 90%
    Sig quality 80 %

    Output 2
    Sig strength 40%
    Sig quality 30 %


    I have tried outputs 3 and 4 also but they are similiar to output 2.

    Anyone got any ideas ? faulty LNB ?

    Thanks !!


Comments

  • Registered Users, Registered Users 2 Posts: 3,905 ✭✭✭steveon


    You will never get exactly the same from all outputs in my opinion but you should try and adjust the Skew of the LNB i.e. twist its postion...usually 5 settings...mite need a philips screwdriver depending on the type of quad you have...


  • Closed Accounts Posts: 17 Grovel


    Sorry not to answer, only to supplement the question ...
    I have a working dish with single LNB (for FTA), but signal quality is a bit marginal due to a tree in line of sight on the satellite. I am tossing a coin between attempting an upgrade to Sky+HD or getting UPC. I was wondering whether moving from the single LNB to a quad would degrade the signal, making the dish useless.
    So the question is ... "should all the outputs on a quad match the output on a single, or should I expect to see degraded signal across the 4 outputs?"
    The other consideration is that the current single LNB must be nearly 10 years old, so would a brand spanking new quad offer some benefits (newer electronics sending better signal to the box).


  • Registered Users, Registered Users 2 Posts: 3,905 ✭✭✭steveon


    If your dish is looking into trees and you are experiencing problems then its more than likely that upgrading to sky hd would not be a worthy idea unless you could perhaps relocate the dish somewhere away from the trees or perhaps on a pole to raise it against the line of the trees.


  • Closed Accounts Posts: 17 Grovel


    steveon wrote: »
    If your dish is looking into trees and you are experiencing problems then its more than likely that upgrading to sky hd would not be a worthy idea unless you could perhaps relocate the dish somewhere away from the trees or perhaps on a pole to raise it against the line of the trees.
    Thanks.

    Sadly I think the trees may push me down the NTL/Chorus/UPC avenue. At least they just launched a HD service ... but will lay a bet that it will not be available in my area.


  • Registered Users, Registered Users 2 Posts: 32,445 ✭✭✭✭watty


    The level can vary a bit. But on the same channel the quality will be very similar or you have a faulty tuner or cable or LNB.

    Only compare by switching cable at the LNB, If there is more than 10% quality difference get a replacement LNB.

    Level is nearly irrelevant.


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  • Registered Users, Registered Users 2 Posts: 269 ✭✭Martin_F


    I'd have thought that a larger dish might also help in a through tree situation. If the LNB is 10 years old - does that mean the dish & cabling is too? I'd think the condition & quality of all the components will contribute overall to signal strength/quality - and could become more important than usual when the line of sight is compromised.


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