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SWM signal strength question

Discussion in 'DIRECTV General Discussion' started by TDK1044, May 5, 2011.

  1. May 5, 2011 #1 of 24
    TDK1044

    TDK1044 Godfather

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    My system is working fine and my 99, 101, 103 signal strengths are all 93 or higher, but I noticed that when I checked my SWM signal strengths, two of them read as zero with all the others at 100. Is that normal? I don't have any issues at all. I have Whole Home DVR and everything works fine?

    Is this a case of 'if it ain't broke don't fix it', or should I address the issue?
     
  2. May 5, 2011 #2 of 24
    veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    the two zeros are from another receiver(s) that are using those two channels.
    If you go to another receiver and look at the SWM, you'll see zeros, but they'll be different numbers.
    If all receivers are on the SWM screens, then there won't be any zeros.
    As each receiver exits the setup menu, you'll see zeros on the other receivers show up.
     
  3. May 5, 2011 #3 of 24
    TDK1044

    TDK1044 Godfather

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    Excellent, VOS. I just fired up all three DVRs and you are 100 percent correct. All SWM signals read 100. Thanks :)
     
  4. Joe C

    Joe C Godfather

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    Does it matter if all numbers are not at 100 ? I have some that are in the nineties on the SWM screen.
     
  5. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Not really.
    If you are getting into the low 80s, then I'd start to look at things.
     
  6. Joe C

    Joe C Godfather

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    OK, thanks for the quick reply. BTW, what do these numbers mean, is it the strength of the SWM frequencies that the DVRs get assigned ?
     
  7. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    "Kind of". They're just like the TP readings, where they're bit-rates instead of power levels.
    Any zeros that you see are from other receivers that are using the channel(s).
     
  8. tritch

    tritch Legend

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    Actually, the exception to this is if you have only one receiver. A zero still shows up.
     
  9. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    :confused:
    "A zero" has to come from another receiver & its tuner being used from the SWiM.
     
  10. HoTat2

    HoTat2 Hall Of Fame

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    Well ... normally correct here anyhow :) ;

    That is unless you have a goofy receiver like my HR21-200 DVR which for whatever reason never shows zeros on the SWiM screen from other receivers on the same splitter using SWiM channels.

    Other receivers' SWiM screens on the same splitter will show the HR21's use of channels, but for some weird reason not it. :confused:
     
  11. HoTat2

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    Though the question is, specifically what transponder's BER is being used for the SWiM signal strength test screen?

    A preselected or arbitrary one from the 101 slot perhaps?
     
  12. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Good question, but :shrug:
     
  13. tritch

    tritch Legend

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    Nope. I only have a HR22-100 and that's the way it always shows up. My father has the exact same setup with a HR23 and it shows up the same way.

    Setup: SWiM LNB -> PI -> HR22-100 (no splitter installed)

    See page 6 of PDF
     
  14. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    I've been testing this for about 4 years now and never seen this.
    Perhaps this has something to do with your receiver(s).
    I have tested this with my HR21-200, which is now deactivated so I can't repeat it.
    The receivers that I have seen this on:
    HR20-700
    H20-600
    H20-100
    H21-200
    HR21-200
    HR24-500
    H25-500
     
  15. tritch

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    Maybe it's an anomaly on HR22 & HR23 receivers only.
     
  16. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    That or just the two that you have seen this on.
    I had multiple receivers before I started testing SWiM, so I've never had only one connected.
    I do know that zeros are specific to receivers as if you check your other receivers, the zeros will be different [because you're monitoring from another one].
    Last night I lost power for a couple of hours, which had everything reset.
    Checking from my H25, the 3 DVRs were only using one channel each [3 zeros] until I started DP on each, which is when they each were using 2, so six zeros then displayed.
    With yours is it always #4 that shows zero, which is at 1382 MHz?
     
  17. tritch

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    Yes, always #4.
     
  18. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Well this is strange.
    If there was a signal other than the SWiM at that frequency, then this would explain it.
    The SWiM has three chips for the nine frequencies, and if this one output was defective, then this would explain it.
    HoTat2 has a receiver that doesn't show any zeros, so I guess this could also come from a defective receiver too.

    I don't doubt what you're seeing, but also have never heard of this before in 4 years either.

    I have worked with someone that had ~50% readings on channel 1, which turned out to be from their cable internet, which was using part of the SWiM band and combined into their coax.
     
  19. tritch

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    It is what it is. I doubt it's a defective SWiM because the same thing is happening on my father's receiver. What are the odds they are both defective? Just chalk it up as a mystery at this time.....
     
  20. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    "If this was mine", I'd be concerned that I could only connect 7 tuners, which is what I currently use, so I couldn't add another if/when needed.
    While you may not want to pursue this, it isn't "normal" by any means.
     

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