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SWM/MRV question

Discussion in 'DIRECTV Installation/MDU Discussion' started by dualsub2006, Nov 13, 2011.

  1. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    The max loss between a SWiM and receiver is 30-33 dB at the highest [worse case] frequency.

    That 8-way it put in the poorest place in your setup:

    [​IMG]
     

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  2. sigma1914

    sigma1914 Well-Known Member DBSTalk Club

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    Wouldn't a simple barrel connector be better than the 8 way?
     
  3. dualsub2006

    dualsub2006 Icon

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    I have another 4 way and 2 way coming. When I add my daughters receiver I'm going to switch it to the 2 way. When I do the 3rd room on that side I'll switch it to the 4 way.

    It's working perfectly as is, so I'm not in a real hurry to undo it.
     
  4. cabletech

    cabletech Legend

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    If your setup is exectly like this diagram, then I have to ask WHY DO YOU NEED THE 8way? Remove it and connect direct to the receiver. Other wise, looks good.
     
  5. dualsub2006

    dualsub2006 Icon

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    Yes it would have been, but I didn't have one, and I'm not going back up there any time soon.

    I have 2 more receivers going in so I'll drop it down when I add on.
     
  6. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    "I get it" and was just pointing out the weakness.

    When you're pushing the specs this much, things like which receiver booted up first come into play.
    If the farthest receiver boots first, it uses channels 2 & 3, which have less loss. Should the house lose power and everything reboots at once, the farthest might end up using channels 6 & 7, which might cause problems, leaving you :confused: and posting "it worked for xx days/weeks and now it doesn't...."
     
  7. sigma1914

    sigma1914 Well-Known Member DBSTalk Club

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    I understand - You gotta do what you gotta do sometimes. ;)
     
  8. HoTat2

    HoTat2 Hall Of Fame

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    Just curious though, why did the tech sign-off on having the 8-way coming off a 4-way like that since that a major install no-no? Or did he know about it?

    And when you get a chance could you post your "PHY Levels" and "Rate Mesh" from an HR24 (press Guide and right arrow buttons on the front panel simultaneously to access this menu under "coax network").
     
  9. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Not sure why you're asking this.
    DECA is a much lower frequency and has a greater range/limit.
    SWiM should be the first to fail with too much loss, as DECA has 20 more dB range, and lower loss through the system.

    The only report of SWiM working and MRV/DECA not, was due to a 2-way splitter being installed backwards and not a DECA modified one at that.

    A rough guess would be the PHY levels would be 30 [with the upper limit being 60 before problems]
     
  10. dualsub2006

    dualsub2006 Icon

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    He never saw it, he didn't ask what I'd put in the attic and I didn't offer the information. It worked when he set up the HR24 and that was good enough for both of us.
     
  11. dualsub2006

    dualsub2006 Icon

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    And now that you've said that if I suddenly begin having problems with the 8 way I'll go swap it out.

    I appreciate the information.
     
  12. dualsub2006

    dualsub2006 Icon

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    I know that VOS says that this isn't relevant to the discussion, but I'm still interested in knowing if these are good numbers.
     

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  13. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Yes. My "rough guess" was slightly lower that your readings, but you're well within the margin for loss and the PHY MESH can't get much higher.
     
  14. Kevin F

    Kevin F Hall Of Fame

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    VOS,

    Do you have a reference post I can take a look at in terms of PHY Mesh rates to compare to?

    Thanks
    Kevin
     
  15. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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  16. Kevin F

    Kevin F Hall Of Fame

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    As long as those are optimal levels that one should want, then yes.

    Thanks
    Kevin
     
  17. HoTat2

    HoTat2 Hall Of Fame

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    Well :eek:... I'll plead temporary insanity before posting that question then. :lol:

    I guess a better one to the OP and more relevant would have been what are the SWM carrier level readings on the master bedroom HR24. Particularly the higher numbered (and thus higher frequency) ones.
     
  18. dualsub2006

    dualsub2006 Icon

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    The OP would tell you that he doesn't have a clue what that means.
     
  19. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    When you go into the setup menu and look at the SAT levels, it starts with the 101 SAT. If you use the "-" to change SATs, you'll see SWM with nine numbers [like the TPs on a SAT screen].
    These are the SWiM channels, where #1 is the guide, and #2-#9 are what the receiver get assigned.
    There will be zero(s) as these come from those channels being used by other receivers.
    If you set all receivers to this setup screen, there shouldn't be any zeros. As each receiver exits the setup, it will get assigned one or two channels, which will show as zeros on the receivers still on the screen.
     
  20. dualsub2006

    dualsub2006 Icon

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    This is my HR24 with all receivers on that screen. I took the HR24 off of that screen first and at the first HR23 2 & 3 were at 0 on that DVR.
     

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