Splitter/setup question

Discussion in 'DIRECTV Installation/MDU Discussion' started by eileen22, Nov 4, 2011.

  1. Jodean

    Jodean Icon

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    Jul 17, 2010
    you have to use splitters/combiners to do this, not diplexers.

    This only works with some high speed internet, in town here it works, last time in was in a Comcast area it didn't.
     
  2. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Not sure where you're using "splitters", but diplexers are what should be used.
     
  3. yogi

    yogi Legend

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    It all depends on where Comcast puts there signal. Usually it's the T channels and the A channels. Way below 250 MHz.

    But, You can all ways put in a SWM system to run a standard DVR.
    Since it would cost about $8.00 to try a diplexer.
     
  4. HoTat2

    HoTat2 Hall Of Fame

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    Los...
    I was thinking of the downstream cable modem data signal which may use frequencies at or below ~700 MHz which the satellite Ka-lo or "B-band" signal may interfere with.
     
  5. Jodean

    Jodean Icon

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    Ok i was thinking for a swm, diplexors will cut out mrv, you cant have mrv over a diplexor so no, thats is NOT what could be used......

    On his legacy that could work
     
  6. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    "But only SD legacy", since HD uses the 250-750 MHz band.
    If this line was to a SD receiver, then the diplexer should be a good type with a lot of rejection to suppress the 250-750 MHz on the SAT leg.
     
  7. Jodean

    Jodean Icon

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    oh, now i see

    so these mysterious splitter installs i came across do work on a legacy 18" round dish??
     
  8. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Not sure what you ran across, but "in the old days", CATV could be diplexed into the SAT coax. Using a splitter wouldn't be the best option, as [you should know] there isn't any filtering between the CATV/OTA and the SAT ports.
    When the Ka-lo SATs came online, diplexing no longer worked.
    Changing to SWiM, freed up the band again, but then DECA came out and used it again, so it's best to keep cable/OTA on its own coax these days.
     
  9. eileen22

    eileen22 Godfather

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    Philadelphia...
    OP here, I'm back to tackle this issue, after I was sidetracked by a coincidental (?) loss in signal and subsequent service call on Tuesday from D*. I had a completely corroded outside connection at the ground block. Now I have a new LNB on dish (replaced old 3 LNB), new lines outside, and two new lines into the house (the other two were ok). As I said in my thread discussing this problem, the tech told me that the WB616 switch that I currently have is no longer available. I asked why, and he said "too expensive." I am keeping that info in the back of my mind, since I will have to deal with this at some point.

    Anyway, the tech left Tuesday morning, and then I received my SD DVR (R16) on Tuesday evening. I swapped it out with the old SD receiver, connecting my lone coax to the Tuner 1 port. Powered it up, and had to call for assistance, since I wasn't sure what my new dish setup was. I knew that the tech had changed this on my receivers earlier in the day (since he replaced my LNB), but he did it so fast, I didn't know how he got to the screen or what option he selected. Got a CSR on the line who helped me with that, and I also seleted the 1 Tuner option, but when that was done a screen came up that said the one tuner was set up, but that Tuner 2 was not, and the options to select were something like Repeat Setup and Get Waiver. There was another option in the middle, but I don't remember what that was. There was no option to Continue, which baffled the CSR, who said that we should have been able to keep going with the setup because we had selected the one tuner setup. We tried several times with the same results, and then she said she would have to transfer me to some other group who could provide the waiver. The guy who answered said he was surprised to be talking to a customer, he said that he usually only gives these waivers to installers. He did what he needed to do on his end, and walked me through the rest of the setup, and I am up and running with the one tuner.

    Now, back to my attempt to get the two tuner capability off of the one available coax line. I see the discussion about splitting/diplexing the other coax (cable modem) line, but that is not an option. I need a very strong broadband connection, as I work from home and am connected to my company's VPN all day long. Several years ago, a Comcast guy came out and installed a splitter in the basement for this line, to bypass the IBM Home Director box we have, since running the cable modem line through there was causing a problem. Since then, we have dropped Comcast TV (used to have both D* and cable but that became unworkable once MPEG4 came along), so this is now the only cable line in use. I don't want to mess with that.

    My revised hardware is:
    works on SWiM:
    1 HR20-700
    2 R16 (update to include new box)
    1 H21

    doesn't work with SWiM:
    3 R15

    For now, it looks like I could get the SWM8, run the two lines off of the legacy ports to the WB616, and run the six lines for the R15s out of the WB616. On the SWM side, now that I need 4 lines, can I still use the splitter that VOS linked in post #14?

    Does something different need to be done with each receiver in the software setup itself, once you are connecting only the Tuner 1 line?

    I see that eBay has several SWM8 switches available cheaper than on Amazon or SS, some also include either an 8-way or 4-way splitter. Is there a downside to using an 8-way splitter if I only need a 4-way? I read some comments about the 8-ways being more prone to rain fade.

    Thanks in advance, and sorry for the long-winded post. I am one of those "chicks" whose husband doesn't know anything about the wiring, and I like to be thorough, since I like to learn and understand how all of this works. :)
     
  10. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    For the receivers that are connected to a SWiM, they auto detect it and so there isn't anything you need to do. For the R-16 that is on only one tuner, you'll need to re-run the SAT setup and select two tuners.
    8-way verses 4-way:
    Many installers use the 8-ways "for everything". I don't, because there is about 30 dB of loss max between the SWiM and the receivers and a 8-way [about 15 dB] has 5 dB more loss than a 4-way [just over 10 dB].
     

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