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SL3 SWM LNB Long Distance Setup Help

Discussion in 'DIRECTV Installation/MDU Discussion' started by gable74, Jan 29, 2011.

  1. gable74

    gable74 New Member

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    Jan 29, 2011
    Hello,
    I have some what of an odd setup and am looking for some help please. I have an SL3 SWiM LNB dish mounted on the garage because there is no clear line of site on the house. I have 2 lines (about 140 linear feet each)of RG6 QS coax running through conduit underground between the house and the garage. Inside the house I have a 21v P.I and an SWS8 splitter. I have three HD DVRs that i need to operate off of this setup. The two DVRs in the house (about 30' from the SWS8) both work fine. The DVR in the garage (again, about 140 linear feet away) will not get a SAT signal. I assume because the total distance round trip from the SWM LNB to the last DVR is almost 300 linear feet. Is there an easier way to make this work without installing another dish? Can I split the one cable coming from the SWM LNB at the garage to feed the DVR out there or do i need it to come all the way to the house and interface with the P.I and the SWS8? I am attaching a rude example JPG of my setup to try and give a more clear example of what I have. Thank you for any help you can offer.
     

    Attached Files:

  2. Davenlr

    Davenlr Geek til I die

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    Sep 16, 2006
    Put a 2 way splitter on the garage near the dish. Attach the garage dvr to the power inserter and locate it behind the dvr in the garage. Connect the ODU side of the power inserter to the power passing port on the two way splitter.

    Attatch the line to the house to the other port on the two way splitter.

    Replace the 8 way splitter in the house with either a splitter with the minimum number of outputs to feed what you are using in the house. 8 Ways are very lossy. If you can get by with a two or three or four way, do that. If you only have one unit in your house, dont use a splitter at all at the house. You can mount the garage two way splitter outside or inside, preferrably inside right by the power inserter.

    Optionally, you can also keep the power inserter in the house, although powering from the garage will give you better voltage to the dish since its a lot shorter run.
     
  3. sungam

    sungam Legend

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    May 10, 2007
    Yes you can split the cable in the garage (1x2) for that receiver and then again in the house for the receivers there. Switching to a 1x4 splitter in the house would probably also do the trick, since with the 1x8 around 5/8ths of you signal is being wasted by the unused splitter outputs. If you split in the garage, you should certainly change to a 1x2 or 1x4 in the house, since the splitter in the house will only be getting half the signal it does now.

    See the information on splitters here:

    http://www.dbstalk.com/showthread.php?t=186663

    Just be sure to maintain the DC path from the PI to the dish.
     
  4. gable74

    gable74 New Member

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    Jan 29, 2011
    Thanks,
    Even not using the SWS8 in the house at all and coming directly out of the P.I. to the garage receiver would not get a signal either. I did continuity and voltage tests through the line so I know there are no breaks. I am going to try the 2 way splitter in the garage and the 4 way in the house and see if I have any luck. Thanks for the input.

    Jimmie

    EDIT****
    Forgot to ask if DECA is still going to work in this configuration? With the 2way splitter in the garage.
     
  5. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    You're simply running through too much coax to get a signal at the end.
    These are close to the max, and even these may be pushing it too far for you:

    [​IMG]
     
  6. matt

    matt New Member

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    Jan 11, 2010
  7. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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  8. matt

    matt New Member

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    I'm all for that, I don't like adding non-D* provided gear, I just thought either way the OP was at the max.
     
  9. gable74

    gable74 New Member

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    Jan 29, 2011
    Cool diagram Oldschool....

    Which one of these would work best? And is that amplifier in the right place?

    [​IMG]
     
  10. Davenlr

    Davenlr Geek til I die

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    Top one, and yes. If that is really your setup (two boxes in the house) use a 2 way splitter not a 4 way.
     
  11. gable74

    gable74 New Member

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    Jan 29, 2011
    Oops forgot to mention that one of those outputs on the 4 way splitter in the house is needed for the DECA box.

    [​IMG]
     
  12. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    If you changed the top one to two 2-ways, you're be at about the max with the receivers in the house getting about -60 dBm. Sonora [the amp maker] calls out -62 dBm min.
    The need for the DECA port, kind of kills this, as there simply isn't a way to get another port without having too much loss.
    If you went with the lower one, the house receivers would also be at -62 dBm, but the leg through the amp would be -58 dBm.
    If I were to go with the lower, I'd move the amp to before the first splitter to boost the power to the house receivers too. The garage would still be the same.
     
  13. gable74

    gable74 New Member

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    Jan 29, 2011
    okay....then how about which one of these? I think I am just enjoying making the diagrams now LOL.

    [​IMG]
     
  14. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    top
     
  15. matt

    matt New Member

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    Will DECA still work at these lengths, with an amp?
     
  16. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    With the right amp, which is two way, yes and the DECA losses are so much less than the SWiM are.
     
  17. Tech_1438

    Tech_1438 Legend

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    Cool Diagrams.

    What tool are you using to make them?
     
  18. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    He started with one of mine made in photoshop.
     
  19. bobnielsen

    bobnielsen Éminence grise

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    Bainbridge...
    It might not make a difference in this case, but it is usually better to place the amplifier before a long length of cable (in the garage) instead of after (in the house).
     
  20. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    "BUT", why waste the amplified signal to the garage, where it isn't needed, and not use all of it on the long run?
    Now to follow what you're trying to say: adding it on the output of the splitter before the long run would require the output to be about -22 dBm.
    I really doubt the noise figure is important here on such a noisy system anyway.
     

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