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Converting from 4 wire LNB to 1 wire SWM

Discussion in 'DIRECTV Installation/MDU Discussion' started by Relativity, Sep 6, 2011.

  1. Sep 6, 2011 #1 of 30
    Relativity

    Relativity AllStar

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    I did some research and just want to confirm if this what I need to convert an existing AU9S (Slimline) connected to a 5 LNB (4 wire type) to a SWM (5 LNB or 3 LNB) setup?

    replace the existing lnb (4 wire type) to an SWM type LNB and re-align dish.
    add a 21V Power Inserter to the single cable line coming out of the new lnb.
    add a 4-way or 8 way SWM splitter after the power inserter so additional receivers can be hooked up later.

    Is that the way to go?
     
  2. Sep 6, 2011 #2 of 30
    mcbeevee

    mcbeevee 97% Complete

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    The power inserter can be anywhere in the coax chain, and the splitters can be before or after the power inserter. You can have any combination of 2-way/4-way/8-way splitters, and you will need to terminate any unused splitter connection. Be aware that with the swm-lnb, the max number of tuners is 8 (dvrs count as 2 tuners). If you plan to upgrade to MRV in the future, you should get the green label splitters. When I swapped out my old lnb with a new swm-lnb, I did not have to adjust the dish.

    :)
     
  3. Sep 6, 2011 #3 of 30
    sigma1914

    sigma1914 DIRECTV A-Team DBSTalk Club

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    Kinda...it needs to be on the correct (red) in/out of the splitter. (VOS will correctly explain better than me.)
     
  4. Sep 6, 2011 #4 of 30
    harsh

    harsh Beware the Attack Basset

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    Do you have (or plan to have) eight or fewer tuners?
     
  5. Sep 6, 2011 #5 of 30
    veryoldschool

    veryoldschool Lifetime Achiever DBSTalk Club

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    It can go before the splitter, and if it's after, then it needs to be connected to the power passing port of the splitter, which is marked and has the red connector.
     
  6. Sep 6, 2011 #6 of 30
    Relativity

    Relativity AllStar

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    One HD DVR, but I would like the capability to expand if required. I understand that 1 DVR uses two connections, so a 4 way splitter supports 2 receivers and a 8 way supports 4 receivers.
     
  7. Sep 6, 2011 #7 of 30
    veryoldschool

    veryoldschool Lifetime Achiever DBSTalk Club

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    That isn't how splitters work.
    The 8 tuner limit is from the SWiM. Splitters pass ALL the signals to their outputs, so you could have a 2-way splitter feeding 2 DVRs have use all four tuners.
     
  8. Sep 6, 2011 #8 of 30
    Relativity

    Relativity AllStar

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    thanks, 8 (tuner) limit is more than enough.
    mrv is a future consideration, so I will look for Green Label Splitters
    as for re-adjusting, did you swap a 5 lnb with a 3 lnb swm?
     
  9. Sep 6, 2011 #9 of 30
    Relativity

    Relativity AllStar

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    so what you're saying is only one wire is required to use the dual tuners on a DVR with SWM? the sat in connections on the HR24, you have Satellite 1 - SWM (2), and Satellite 2. One wire is connected to the SWM (2) connector? and that will support dual tuners?
     
  10. David Ortiz

    David Ortiz Save the Clock Tower!! DBSTalk Club

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    Correct. The SWM (2) indicates the number of SWM channels (tuners) that the HR24 will use.
     
  11. TBoneit

    TBoneit Hall Of Fame

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    I believe that it is 8 Tuners, not eight receivers. a dual tuner DVR would use 2 out of the 8.

    Anybody care to correct me if I understand it wrong?
     
  12. Relativity

    Relativity AllStar

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    yes it is 8 tuners, the DVR uses 2. I used the term receiver incorrectly here.
     
  13. Relativity

    Relativity AllStar

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    so the power inserter can go just before one of the receivers without trouble? this would make things easier if a power plug is not available near the splitter.
     
  14. veryoldschool

    veryoldschool Lifetime Achiever DBSTalk Club

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    "As if" DirecTV hadn't thought of this. :lol:
    In this case, it just needs to be connected to the correct port of the splitter.
     
  15. Relativity

    Relativity AllStar

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    Excellent! Now that I understand the wiring, and requirements. I guess my only concern now is replacing a LNB (5 lnb type) with a 3 LNB SWM type. Would that require re-alignment on an existing setup? I would think yes, but I am not sure.

    Also I noticed two different models of inserters, a 21V and 29V powered model. Is the 29V for someone with long cable runs ,and or, multiple receivers?
     
  16. veryoldschool

    veryoldschool Lifetime Achiever DBSTalk Club

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    It never hurts to check the alignment, "but" a SL5 to SL3 swap doesn't change the alignment.
    The 21 volt is used with the SWiMLNB, while the 29 volt is used on the other SWiMs. You can use the 29 on the SWiMLNB, though. If you've got really long cables that may have more loss than normal, then the 29 volt helps.
    This has nothing to do with how many receivers.
     
  17. RD in Fla

    RD in Fla Icon

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    Just made a swap to a SWiM LNB (thanks to VOS for the suggestion) and did not require realignment. In fact my signals have improved on all birds.
     
  18. Relativity

    Relativity AllStar

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    May 28, 2011
    did you swap to a 3 or 5 lnb swm?
     
  19. mcbeevee

    mcbeevee 97% Complete

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    I went from a regular 5-lnb to a swm 5-lnb. My setup is like Figure 10 in the swm-lnb help document, with the power inserter located in my computer room.

    DBSTalk First Look - SWM-enabled Slimline LNB

    :)
     
  20. eakes

    eakes Godfather

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    Last summer I installed a new HD setup for my sister. I used a 5 LNB, 4-coax unit for alignment (my meter doesn't work on SWM). Once aligned, I swapped in the 3 LNB SWM assembly.

    I checked signal strength on all transponders before and after the swap and could discern no noticeable change between the two.

    Technically, unless one does something to physically distort the configuration (bump the dish, bend the LNB arm, etc) there should be no difference between the LNBs as far as alignment is concerned. Electrically, there could be some differences in signal strength or fade margin because there are different electronic components involved (noise figure of RF transistors, internal gain characteristics, etc), but these differences should be minimal.
     

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