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  1. #1
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    Default Polarization problem


    I get a problem when I try to scan satellites which you have to turn the dish southward. That means the sats like Insat 2E, Thaicom 5, Telstar 10, ABS 1, Intelsat 7/10. (Azimuth 155 to 240)

    When I scan for channels on these range sats I have to set the polarization opasite to what it really should be. (Ex for a transponder with Vertical polarization, I have to set my settings to Horizontal to get it.

    Sats in other Azimuth ranges do not have this problem. Can anyone please tell me why this is happening & how to correct it?

  2. #2
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    You have to adjust the skew for your lnb. The problem will be solved. If you are using a dish without polar mount then you have adjust the skew for all the satellites. You may not notice it for strong satellites but for weaker ones you need to do it. Especially for H & V polarisations.

  3. #3
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    Quote Originally Posted by dimu1234 View Post
    I get a problem when I try to scan satellites which you have to turn the dish southward. That means the sats like Insat 2E, Thaicom 5, Telstar 10, ABS 1, Intelsat 7/10. (Azimuth 155 to 240)

    When I scan for channels on these range sats I have to set the polarization opasite to what it really should be. (Ex for a transponder with Vertical polarization, I have to set my settings to Horizontal to get it.

    Sats in other Azimuth ranges do not have this problem. Can anyone please tell me why this is happening & how to correct it?
    there is your location issue - where?
    and then v polarities cannot go for h,
    neither can h go for v unless your lnb is made
    the opposite of other lnbs, or else your receiver has
    reversed polarities.
    the satellite arc is east to west,
    unless you are using offset dish which can
    do any direction if satellite you are tracking is about
    overhead to your location.

  4. #4
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    Yes Sats are from East to West. But only when they are close to South I get the problem.
    When scanning Asiasat 3S and other sats close to East or West I get the polarity correctly. Only for te sats close to South like Thaicom5, Telstar 10, ABS 1 I get this changing polarity problem.

  5. #5
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    Default Polarization problem

    Your meaning is ...,
    `when you are searching at Asiasat-3S , the satellite dish moves other places ' .
    If so , my opinion is ....
    u will need to reset of ur positioner's memory .
    And then , u can search as new .

  6. #6
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    Quote Originally Posted by soeminnaing.jj View Post
    Your meaning is ...,
    `when you are searching at Asiasat-3S , the satellite dish moves other places ' .
    If so , my opinion is ....
    u will need to reset of ur positioner's memory .
    And then , u can search as new .
    No the dish not moving. I mean when I searching channels in Asiasat-3S the channels come as they are mentioned in Lyngsat site or anyother site. But the sats closer to south the polarity is changing.

    That means 3750 V 13333 3/4 I get as 3750 H 13333 3/4

  7. #7
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    Do you have a fixed dish or motorised dish? If you are having fixed dish then you have to set the polarity if you move the dish more than 45 degrees. Actually you have to set it for each Satellite but if the signals are strong it is not needed. Skew would go in' - ' degrees if you move towards east and it would be in +degrees after you cross south if you live in northern hemisphere.

  8. #8
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    Default Polarization problem

    Quote Originally Posted by dimu1234 View Post
    No the dish not moving. I mean when I searching channels in Asiasat-3S the channels come as they are mentioned in Lyngsat site or anyother site. But the sats closer to south the polarity is changing.

    That means 3750 V 13333 3/4 I get as 3750 H 13333 3/4
    Your polarity is fixed or removeable in L.N.B .
    Your meaning is ....
    polarity V <=> H change in receiver ?
    Can it get to see channels ?
    If u can get to see channels , that is no problem .
    If not , u change 45' of ur L.N.B position .

  9. #9
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    Quote Originally Posted by dimu1234 View Post
    No the dish not moving. I mean when I searching channels in Asiasat-3S the channels come as they are mentioned in Lyngsat site or anyother site. But the sats closer to south the polarity is changing.

    That means 3750 V 13333 3/4 I get as 3750 H 13333 3/4

    If so go and turn ur LNB position to 45° then u'll get the right polarity as H=H and V=V .But u need to know ur dish is fix or motorize.



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  10. #10
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    I think our friends using a non-tracking mount, and therefore the LNB skew is not self adjusting as the dish tracks the arc. Or as someone suggested, the LNB's skew is not set correctly.

    Go to asiasat 3c turn the LNB, until you loose the signal [horz] mark the spot, Then turn in the other direction until you loose the signal [vert] mark, then set the LNB between the two marks and test.
    regards from OZ bassett

  11. #11
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    Quote Originally Posted by dimu1234 View Post
    I get a problem when I try to scan satellites which you have to turn the dish southward. That means the sats like Insat 2E, Thaicom 5, Telstar 10, ABS 1, Intelsat 7/10. (Azimuth 155 to 240)

    When I scan for channels on these range sats I have to set the polarization opasite to what it really should be. (Ex for a transponder with Vertical polarization, I have to set my settings to Horizontal to get it.

    Sats in other Azimuth ranges do not have this problem. Can anyone please tell me why this is happening & how to correct it?
    Dear dimu1234,
    Please mention the type of your dish, such as polar mount or adjustable AZ/EL dish. Also mention the type of dish such as mesh or stamped metal with dish size.

 

 

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