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Coax line does not receive data from satellite

Discussion in 'DIRECTV Installation/MDU Discussion' started by purecharger, Dec 8, 2010.

  1. Dec 9, 2010 #21 of 113
    veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    I haven't seen this before.
    Are you still using Cox cable internet?
    Why one coax also give these numbers "but works", might be due to a shorter coax and having less loss than this one, "but" the numbers show there is another problem, which because of being so close to the cable TV band, kind of suggests that it has something to do with it. Maybe there is still a filter or other component left in the line feeding your condo, or it is still somehow connected to your feed.
    Either recheck all the coax runs and disconnect everything but this run and see if anything changes, "or" have the tech back out and show him what the SWM does and make him fix it.
     
  2. Dec 9, 2010 #22 of 113
    atkinsod1

    atkinsod1 New Member

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    Folks the cables need to be separated for you networks. The whole home dvr stuff is set up differently. Thinnet is a thing of the past. You must have band stop filters on the regular ird's. Cat 5 is for tcpip. Coax is for hd. Rg-6. Keep the hard wired media separate. The mrv can be done but it is "bear to set up". I didn't have it installed in my home because i didn't want collision on my ip network or anything connected to dtv. The dod is fine to one dvr. Please consult with a expert before you wire your home.
     
  3. Dec 9, 2010 #23 of 113
    Alebob911

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    huh?? No issues here whatsoever with MRV, Internet, or DOD to multiple receivers. :confused:
     
  4. Dec 9, 2010 #24 of 113
    purecharger

    purecharger Mentor

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    Yes, I do have cable internet still on the single line coming into my unit. Important detail, huh? :) I am asking the installer to come back out, remove the cable internet from the line and see if that fixes the issue.
     
  5. Dec 9, 2010 #25 of 113
    veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    That would be a good place to start.
    Then once [if] this shows it was the problem, he should still be able to diplex in the internet on the single coax and then diplex it back out and have the DirecTV work.
    He may have used splitters instead of diplexers to do this "and that would explain" this.
     
  6. Dec 9, 2010 #26 of 113
    veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    "Folks" should learn about networking [and the types used here] before suggesting what to do or not.
    The closest thing I can make out from your post is that DECA networking can't be on the same coax as OTA, or cable modems, "but" if one realizes what and how these work, the cable modem signals can be blocked with bandstop filter and still have a DECA network downstream, and diplex out the cable modem before the filter, for use too.
     
  7. Dec 9, 2010 #27 of 113
    purecharger

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    veryoldschool: my dbs/cable/coax networking is obviously lacking, but my installer told me that by having cable internet and DirecTV on the same line, MRV via DECA was an impossibility. From your comment, that sounds totally false.
     
  8. Dec 9, 2010 #28 of 113
    veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    "Maybe not totally false", but can be done.

    First what I think your issue right now is that he used a splitter and the cable modem is adding noise that is causing the low numbers for the guide SWM channel.

    Now what needs to be done for internet, DirecTV, and MRV:

    SWiM -> diplexer [cable modem is inserted] --> coax feed to the condo --> diplexer [extract cable modem] --> bandstop filter--> splitter--> receivers.
    The "extracted" cable modem MUST go on a separate coax to the modem.

    The bandstop filter keeps the MRV/DECA within the condo and is shared between receivers.
     
  9. Dec 9, 2010 #29 of 113
    purecharger

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    I'm almost positive he did not use a bandstop filter. I'll check tonight when I get home, but I think he has a 4-port diplexer with two 2-way splitters off that, and the problem coax line coming straight off the diplexer. Thank you for the info.
     
  10. Dec 9, 2010 #30 of 113
    veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    There is no 4-port diplexer ["di" means two], so what you have is "merely" a 4-way splitter, with 2-ways off it.

    This is one built for SWiM:
    https://installeroasis.com/nas-std-9501-satellite-diplexer-for-directv-swim-2-pack-pr-160.html

    But as you can see they don't stock it, so:

    http://www.solidsignal.com/pview.as...r-Passing-(STD9501)&c=Diplexers and Taps&sku=

    And here's from the manufacture's site:

    MODEL STD-9501
    DESCRIPTION
    VHF+UHF / Satellite (950 -2150 MHz) combiner
    ORDER # 215200
    FEATURES Low insertion loss.
    SPECIFICATIONS Satellite input frequency range 950 ÷ 2150 MHz
    Satellite frequency insertion loss < 2 dB
    Satellite return loss > 10 dB
    Terrestrial input frequency range 5 ÷ 806 MHz
    Terrestrial input insertion loss < 2 dB
    Terrestrial return loss > 10 dB
    Isolation between satellite and terrestrial > 30 dB
    Satellite input DC Voltage pass Yes
    Tettestrial input DC voltage pass No
    Bias current 500 Max. A
    Operating temperature range -34 ~ +60 (-31 ~ +140) Cº(Fº)

    A bandstop filter would only be used with the DECA networking.
     
  11. Dec 9, 2010 #31 of 113
    wallfishman

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    vetryoldschool i know a job where a tech said they had a 4 way splitter with
    one line going to broad band deca to a router
    one line to a hdddvr
    one line to a standard
    no mrv hooked up just broadband deca.

    question is tech forgot to put bandstopfilter on standard. will it be an issue?
     
  12. Dec 9, 2010 #32 of 113
    veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    I look at the filter as "insurance" to keep from hitting the SWiM or receiver with the very high DECA signal that can [or might] cause distortion.
    The tuner chip is spec'd for -20 dBm, but the DECA starts at around 0 dBm or more.
     
  13. Dec 9, 2010 #33 of 113
    wallfishman

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    we get jobs like that all the time. they only have one hddvr and 2 standards so they arent getting MRV. but they still want broadband deca to do on demand and the tv apps
     
  14. Dec 9, 2010 #34 of 113
    veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    How does this even get through the ordering system? :confused:
    DECA, for what $199, to have internet access? :confused:
    Seems like a wireless adapter would be cheaper and just as effective.
     
  15. Dec 9, 2010 #35 of 113
    HoTat2

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    Very good VOS on explaining how the DirecTV SWM signals may be successfully diplexed in with cable internet service.

    But though the standard may not be widely deployed as yet, might we qualify your procedure here a bit that this of course should not be used with DOCSIS 3.0 systems? :)

    From a DOCSIS 3.0 tutorial at;

    http://bradyvolpe.com/docsis-3-0/downstream-channel-bonding/

     
  16. Dec 9, 2010 #36 of 113
    wallfishman

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    they dont pay anything for it . the order will say programming NO which means no MRV, but their will be a line item for a broadband deca. I think any new install with an HDDVR they get broadband deca if they have internet.
     
  17. Dec 9, 2010 #37 of 113
    wallfishman

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    did u ever hear "why ask why just do or die " ?
     
  18. Dec 9, 2010 #38 of 113
    veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Man everyone is "stealing" bandwidth now aren't they? :lol:
    This just might be what is causing the issue with the guide channel. :eek2:
     
  19. Dec 9, 2010 #39 of 113
    purecharger

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    I do have a DOCSIS 3.0 modem which is getting me faster speeds by far than I had with my DOCSIS 2.0 modem...which leads me to think my Cox internet actually is DOCSIS 3.0.

    I've asked the installer to come back out and help with this, first by doing the test of removing the cable internet signal from my line-in. Unfortunately he is being difficult and saying it won't help because it works fine in other rooms. *sigh*
     
  20. Dec 9, 2010 #40 of 113
    veryoldschool

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    Get another installer. ;)
     

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