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    Help - pixalation

    This is a discussion on Help - pixalation within the Sky & Sky+ TV forums, part of the Other Sky help and support category; Hi i read and tried the information in the sticky at the top and it hasn't cure my pixalation. i ...

    1. #1
      chimpy's Avatar
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      Help - pixalation

      Hi i read and tried the information in the sticky at the top and it hasn't cure my pixalation.
      i have tried and monitor a couple of things and found the higher the channel frequency the signal strength drops and also horizontal polarisation has a lesser signal strength than vertical polarisation for similar channel frequencies, has anyone any ideas??
      thx in advance. t


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    3. #2
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      Re: Help - pixalation

      Hi Chimpy, welcome to the site.
      Can I ask how you are checking the signal strength of different transponders? Do you have a Sky+ or HD?
      The higher in frequency you go, the more severe the effect of noise. Thats why theres an LNB on the dish, to down convert the RF signal as quickly as possible.
      As far as one pole being stronger, i would say the lnb possibly needs spinning to line up the poles with the LNB's antenna element.

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      Re: Help - pixalation

      hi thx for the reply, i have a humax digital box for other satelites and entered frequencies in manually and then checked the signal strength, haven't quite made it to sky+, or HD, i am using using a panasonic box, think 31.

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      Re: Help - pixalation

      OK, are you using a steerable dish, and if so have you checked poles either side of 28.2E?
      I'd still at the moment guess at a pole problem if one looks stronger than the other.

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      Re: Help - pixalation

      thanks once again for your response, yes its a 80cm motorised, 28 is as far round as i go going east, going west i can pull in up too 43degrees, haven't really noticed a problem on other sats, strengths im getting are;

      10744 H 60%
      10976 V 75%
      12148 H 25%
      12168 V 55%

      would have prob expected more from a 80cm dish, lnb's about 10 years old, might just try another lnb,when im brave enough to get the ladder out!!!

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      Re: Help - pixalation

      OK, only thing I can suggest is taking readings on poles on the bird nearest to 28.2E and seeing if theres a similar trend there. It might be you are only getting to the limits of your setup with the furthest most east bird being old Sky.

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      Re: Help - pixalation

      sorry should have said it's only just started over the last week or so, so something has gone amiss...

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      Re: Help - pixalation

      A new LNB should have a better noise figure than a 10 year old one so it should improve things, but unless the H and V signals level out as well, I'd look at adjusting the LNB skew.

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      Re: Help - pixalation

      Quote Originally Posted by chimpy View Post
      and found the higher the channel frequency the signal strength drops and also horizontal polarisation has a lesser signal strength than vertical polarisation for similar channel frequencies, has anyone any ideas??
      Faulty cable. Water in the cable. Cable kinked or crushed. Try a (temporary) new cable, just to prove or disprove my suggestion.

     

     

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