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Odd versus Even signal disparity on 99c signals

Discussion in 'DIRECTV Installation/MDU Discussion' started by diitto, Oct 22, 2009.

  1. diitto

    diitto New Member

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    Oct 22, 2009
    Hi... I was recently told that my 99(c) satellite signals were very low (see below)... OK, I believe that... And I intend to work on trying to adjust my antenna soon. But I also need to know what folks thinks it means that all the odd numbered transponders are approximately 1/2 of the even transponder readings (see that below)... Could that odd/even signal level disparity be caused by alignment?? If so, how??? If not alignment, what might cause this??? A bad LNB???

    1-8 28 62 31 61 27 62 26 58
    9-16 23 60 23 54 23 60 n/a n/a

    Oh, and one other point in case it matters, I have the four output lines from the dish going into the four appropriate inputs of a Zinwell WB-68 6x8 multiswitch (needed because I needed a fifth input to accommodate my system, 2 dual channel HR20's and 1 single channel R15)...

    Any help would be much appreciated... thanks much... bob...
     
  2. RobertE

    RobertE New Member

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    Jun 9, 2006
    Yes, being out of alignment can affect one polarity more than the other. I my experience, it's usually the elevation that needs tweaking.
     
  3. diitto

    diitto New Member

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    Oct 22, 2009
    Thanks... I appreciate the feedback... bob...
     
  4. skidadesert79

    skidadesert79 AllStar

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    Sep 17, 2008
    Welcome to DBStalk :welcome_s
     
  5. diitto

    diitto New Member

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    Oct 22, 2009
    Hi... I downloaded the alignment pdf document for my KaKu dish.. I had a friend actually make the adjustments while I monitored the signal levels on the 101 sat. We first performed the fine adjust dither on the elevation... After recentering the 101 signal we then checked the 99(c) and there was no improvement... But we then did the same procedure on the azimuth and that proved to be the ticket... We went only 1 1/4 turns counterclockwise on the fine adjust and lost the signal completely... We then went back where we started and found that we had to then move a full 4 turns in the clockwise direction to get down to around 50%... We followed the procedure to find the center of those two dither adjustments and pretty much everything go better...

    Prior to adjustment, recall that my 99(c) values were

    1-8 28 62 31 61 27 62 26 58
    9-16 23 60 23 54 23 60 n/a n/a

    And after doing this azimuth adjustment, they came up to

    1-8 85 86 86 82 82 87 85 84
    9-16 82 85 82 81 85 87 n/a n/a

    Note that not only did the signals come up but also the disparity between odd and even went away too...

    So I just wanted to report that and thank you guys for the help... So now I know how to do the fine adjustment for the elevation and azimuth.. Again, thanks... bob..
     

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