Reverse band LNB - 13 or 21 tuners

Discussion in 'DIRECTV General Discussion' started by slice1900, Jun 2, 2016.

  1. Jun 2, 2016 #1 of 28
    slice1900

    slice1900 Well-Known Member

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    Saw an interesting post on satelliteguys from an installer. He used the reverse band LNB for an install with 16 H25s but three didn't work. He says he found out that it will downgrade itself to 13 tuners depending on what is connected to it. Apparently connecting an HR34 to it will drop it to 13 tuners, as well as a specific model of H25 that he installed one of (he didn't say which one)

    As far as I've seen, all the tuner chips available range up to 2150 MHz so I wouldn't think it is a problem with some models using tuner chips that have a lower range. Maybe they have some sort of filter inline? Whatever the case, I guess that explains this confusion over whether it supports 13 or 21 tuners.

    Perhaps it will be possible at some point for someone to compile a list of models that will work with 21 tuners, so those who have more than 13 tuners and want to use a reverse band LNB will know what receivers they need to replace.
     
  2. Jun 2, 2016 #2 of 28
    veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    This is what happens when you don't know and are merely guessing [aka "spit balling"].

    Maybe it was the phase of the moon
     
  3. Jun 2, 2016 #3 of 28
    slice1900

    slice1900 Well-Known Member

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    If I don't know, is guessing a terrible idea? Maybe someone will come along with a better guess, or better yet someone who actually knows the reason. People have been wondering about why the discrepancy between 13 and 21 tuners for the reverse band LNB, that post on satelliteguys is the first I see that links it to specific receiver models. Knowing that doesn't answer the 'why', but it points to it being in some way hardware related on the receiver side.

    If you aren't able to enlighten us as to the reason, not sure why you felt a drive-by insult was necessary.
     
  4. Jun 2, 2016 #4 of 28
    texasbrit

    texasbrit Well-Known Member

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    here goes with a definitive (partially) response. Not a guess. If you go to sat setup, at least on my HR44, and you have a 21 tuner Reverse Band LNB, a message pops up that says:
    "If a network has at least one NDS, Hx2x or HR34 only 13 SWM channels can be used".
    No mention of H25s.
    And it must be firmware-related because my HR24s running CE software work perfectly on my 18 tuner setup.
     
  5. Jun 2, 2016 #5 of 28
    CuttySnark

    CuttySnark Member

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    What is meant by NDS? Usually in context of D* that refers to the former company now a part of cisco but that wouldn't make sense.
     
  6. Jun 2, 2016 #6 of 28
    KyL416

    KyL416 Hall Of Fame

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    NDS is the company that made the software that runs on SD receivers like the D12 and R16, which are SWM capable. (Any previous D1x and R1x models, as well as pre D/R/Hx-era receviers are not SWM capable and can only be hooked up to Legacy ports, so they are not part of the SWM tuner count)

    People have reported problems when experimenting with the newer LNBs where the receivers listed in that warning had problems if certain SWM channels were already taken by other receivers, which would be a problem after a power outage and they didn't boot up in the right order.
     
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  7. Jun 3, 2016 #7 of 28
    CuttySnark

    CuttySnark Member

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    I had no idea that NDS did the SW for the sd irds.
     
  8. Jun 3, 2016 #8 of 28
    veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Perhaps it was to get the following posts that were much more informative.
     
  9. Jun 3, 2016 #9 of 28
    RunnerFL

    RunnerFL Well-Known Member

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    Here's what I found based on personal experience.

    If the LNB is a "first gen", starts with 3D1 in the model number, you'll only get 13 tuners. If you have a "second gen", starts with 3D2, you'll get 21.

    When I bought my RBLNB the Ebay Seller mistakenly sent me a 3D1RBLNB and I only got 13 tuners. When he corrected his mistake and sent me a 3D2RBLNB I got 21.
     
  10. west99999

    west99999 Icon

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    Maybe he set them up wrong in the menu? If he set them to SWM3 and not RB2 maybe? I don't know because I haven't used any with more than 13 tuners yet.
     
  11. P Smith

    P Smith Mr. FixAnything

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    slice, opened a thread based on sg's FUD ? tsk,tsk,tsk :)

    not before get info from SECOND other knowledgeable source, perhaps here
     
  12. RunnerFL

    RunnerFL Well-Known Member

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    They auto detect. You can't set them up wrong.
     
  13. texasbrit

    texasbrit Well-Known Member

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    Yes, it auto detects the Reverse Band LNB. The only thing you have to do is to go through sat setup completely if you are going from a 5LNB to the 3LNB reverse band.
     
  14. bakers12

    bakers12 ΔS > 0

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    Hx2x includes H25s as well as anything else with a H and a 2 in it.
     
  15. texasbrit

    texasbrit Well-Known Member

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    Yes, after I posted I realized that....

    I suspect this issue is IRD firmware related, and not the LNB itself. That might explain why the HR24s I have running CE software work fine in a 21 tuner configuration, and why the poster over at sat guys has some H25s that work and others that don't. But it's still all speculation.
     
  16. west99999

    west99999 Icon

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    I have setup 5 of these so far and they don't auto detect like a swm3 would. You have to pick the proper LNB from the drop down.
     
  17. texasbrit

    texasbrit Well-Known Member

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    Mine autodetected fine. But if your current LNB is an SWM5, you need to go through sat setup completely and select from the dropdown otherwise the IRD thinks you still have a 5LNB
     
  18. RunnerFL

    RunnerFL Well-Known Member

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    I've setup 2, both auto detected.
     
  19. compnurd

    compnurd Hall Of Fame

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    Ditto It wont let me manually change it
     
  20. HoTat2

    HoTat2 Hall Of Fame

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    How would that have really been possible though?

    Aren't all SWiM LNBs auto-detected by the receiver from the drop-down selection menu in the setup and then grayed-out to where it can't be changed manually?

    Sent from my SGH-M819N using Tapatalk
     

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