How is your dish mounted ???

Discussion in 'DIRECTV Installation/MDU Discussion' started by dtv757, Aug 18, 2019.

  1. dtv757

    dtv757 Icon

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    757
    So here in Va beach we have had a lot of crazy rain recently and I have noticed a lot more rain fade events then in the past ...


    Reason I bring this up is because I remember years ago we had the dish on a pole (see photo in my avatar) and it would never go out . Rain , hurricane, snow I would rarely loose service ... but I think a tree grew and they had to move the dish ..


    Now it's on the roof and although the signal says 100% on most transponders I get a lot of rain fade


    Does anyone have specific recommendations for best reception?


    Pole , chimney mount, roof ??

    Thanks all

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  2. MysteryMan

    MysteryMan Well-Known Member DBSTalk Club

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    When water saturated clouds are in your dish's LOS you will experience rain/snow fade regardless of where your dish is mounted.
     
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  3. makaiguy

    makaiguy Icon

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    Since this was such a basic question, to be sure the answer is understood:

    LOS = Line Of Sight, the direct line between your dish and the location in the sky of the satellites. Depending on your geographical location, this angle may be higher or lower from the horizon -- the higher the angle, the less atmosphere it has to go through and the nearer a storm must be to block your signal. On the East coast you can have more rain fade than folks further west who have higher angles because even more distant storms can block your signal.
     
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  4. dtv757

    dtv757 Icon

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    Thanks all I knew what LOS was/is .


    But I kid u not I had much better reception on a pole than on the roof


    And I do remember multiple hurricanes having signal on the pole

    But now not so much on the roof

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  5. James Long

    James Long Ready for Uplink! Staff Member Super Moderator DBSTalk Club

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    The antenna may not be aimed as well as it was before. Were there any other changes when the dish moved from pole to roof (different LNB?).

    The biggest change when moving a dish is LOS. As you mentioned, a tree grew and disturbed the LOS for your old dish location. There may be a partial blockages for your new dish location. Get as close as possible to the dish and use a satellite finder app with augmented reality and see what could be in the way.
     
  6. slice1900

    slice1900 Well-Known Member

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    Pole/chimney/roof doesn't make ANY difference to rain fade.

    What numbers you getting on 99ca/99cb/103ca/103cb?
     
  7. dtv757

    dtv757 Icon

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    I'll post later . I tried to get the # from my slingbox but could not find "-" on the slingbox app

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  8. dtv757

    dtv757 Icon

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    Here are some of my signal results [​IMG][​IMG][​IMG][​IMG][​IMG]

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  9. dtv757

    dtv757 Icon

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    103[​IMG][​IMG]

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  10. dtv757

    dtv757 Icon

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    May someone remind me what's on what?

    101- sd national.channels ?
    110- spanish channels??
    Where are Norfolk locals

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  11. slice1900

    slice1900 Well-Known Member

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    Your dish could probably be better aligned, you should have everything in the 90s on 99ca/cb and 103ca/cb.

    101 is SD nationals, 119 is Spanish. 110 is no longer used.
     
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  12. dtv757

    dtv757 Icon

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    Thanks will let them know when they install new box later this week

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  13. RBA

    RBA Well-Known Member

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    When your dish was moved to the roof did they change dishes? With your question about 101/119 & 110 it might indicate a switch to a slimline dish which introduced 99 & 103 Ka satellites. The Ka satellites (HD) are much more prone to rain fade.
     
  14. dtv757

    dtv757 Icon

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    I think I have had slimline for a while now as that's needed for Spanish channels ...


    Since at least 2010 possibly before


    I know now its 1 wire from the dish , years ago it was 4 wires and we had a multi switch with power inside the house


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    Last edited: Aug 19, 2019
  15. west99999

    west99999 Icon

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    possible they changed you to a reverse band and in my experience rain fade is worse on these lnbs.
     
  16. slice1900

    slice1900 Well-Known Member

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    That makes no sense, the Ka reception parts of the LNB are completely unchanged. There is a bit of variation between them, maybe your non-RB one was a "lucky" one that happened to have a bit less noise.
     
  17. RBA

    RBA Well-Known Member

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    Before the slimline dish Directv used an oval dish for 101/119 & 110. I believe the Spanish broadcasting came off 110. You could have had the old 3 satellite dish before the Slimline it used 3 cables and a multi switch.
     
  18. west99999

    west99999 Icon

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    When tuning in a reverse band you'll be lucky to get -30dbm and most of the time you're getting around -35dbm. On an old swm3 lnb you could tune them in around -20dbm easily. Im not sure why but RB has worse rain fade in my experience and I think I've put in enough(not one lucky one) and had enough complaints to correlate the two.
     
  19. TANK

    TANK Icon DBSTalk Club

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    The hurricanes probably came from the opposite direction that the dish is aimed at.
    Here in FL if a hurricane comes from the ocean side the signal isn't lost until the hurricane crosses over. If the hurricane comes from the gulf side ,I lose the signal faster.

    Are you getting more rainfall totals from storms now ? If so the increase in rainfall means quicker rain fade than just a passing storm with less moisture in the clouds.
     
  20. slice1900

    slice1900 Well-Known Member

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    That's because the old analog LNBs had to boost the power of ALL transponders to account for the weakest ones which are 10 db less than the strongest. The digital LNBs boost the power of each transponder individually which makes the composite power you measure less by around 10 db. Basically the old LNB was overboosting the power higher than it needed to be to make up for weak transponders, like if you crank the volume on your TV while watching a movie because there are some scenes where people are whispering.

    Having everything cranked to -20 dbm doesn't help with rain fade at all, rain fade is solely about the signal to noise ratio. Unless you are seeing lower SNR levels on a meter (or readings on the receiver, which are based on SNR) for 99ca/99cb/103ca/103cb the "worse rain fade" in your mind - or maybe in the minds in those complaining to you?

    Are you seeing lower readings in the 99ca etc. with reverse band LNBs? If not, the difference is all in people's heads.
     

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