Correct skew angle

Discussion in 'TV & Satellite' started by AT Fun, Mar 21, 2015.

  1. AT Fun

    AT Fun Funster

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    I have just installed an Avtex sat dome and on testing I can only lock onto Astra 1 The instructions say the skew is factory set for receiving satellites located at 13E from an earth location of 12E and I will need to adjust the skew, it suggests moving it whilst in service and watch the signal quality on the tv whilst I am doing it, the problem I have is that at home where I have ladders etc to go on the top I am shielded from the satellite by the house so can not do that. I don't want to do it while away from home so does anyone know the correct skew angle for Astra 2 to cover all of England as there is a graduated scale on the LNB I can use to do the setting.
     
  2. AT Fun

    AT Fun Funster

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    Just found dishpointer.com which seems to give me a skew of -11.5 for my location I would still appreciate any input from knowledgeable folk on here as to which angle to set to to give best all-round results I do not have auto-skew.
     
  3. John Laidler

    John Laidler Funster

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  4. AT Fun

    AT Fun Funster

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    Looking at that table if I take out the extremes then average the rest of UK it looks like a skew of -12 or -13 would be best.
     
  5. pappajohn

    pappajohn Funster Life Member

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    If you are looking for astra 2 then no amount of skew will find it at 13 deg

    Astra 2 is at 28.2 degrees east
     
  6. pappajohn

    pappajohn Funster Life Member

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    Sounds like this is a second hand unit.
    If so the control box needs reprogramming or possibly replacing.
    I believe some could be programmed and some cant.
    Somebody will know for sure.
     
  7. AT Fun

    AT Fun Funster

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    I am not looking at 13 east, that's what the factory has set the skew for I need to change it for a satellite at 28.2 east as you correctly say.
     
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  8. AT Fun

    AT Fun Funster

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    Its a new unit but it comes from the factory in Italy with the skew set to work fine in that area.
     
  9. John Laidler

    John Laidler Funster

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    I didn't know what skew was until I read the document in the link. It seems the satellite signal is "polarized" and the LNB needs to be slightly rotated to align with the way the signal is twisted.
     
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  10. laneside

    laneside Funster

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    Having travelled down from northern England right down to the Algarve I have found that the LNB skew angle only makes marginal difference. If you look from the back of the LNB towards the dish then anything around the 30 minutes mark is good enough for the whole of England, as you get further south then somewhere around 20 to twenty five minutes to gives a marginal improvement.Not been to the north of Scotland yet but I believe 25 minutes past may be the ideal
     
  11. AT Fun

    AT Fun Funster

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    Presume you are referring to degrees not minutes as 60 minutes = 1 degree, your figures seem higher than I was expecting but thanks for the input.
     
  12. laneside

    laneside Funster

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    Oooops sorry was referring to the clock face
     
  13. AT Fun

    AT Fun Funster

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    Good news I have just turned the motorhome round 180 degrees and bingo I get Astra 2 so the line of sight must have been blocked by something. I will still reset the skew when I get chance and its a bit warmer for messing about on the roof.
     
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