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Splitting feeds

Discussion in 'DIRECTV Installation/MDU Discussion' started by JDL, Nov 15, 2008.

  1. houskamp

    houskamp New Member

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    Sep 14, 2006
    8 tuners... I have lines ready in several other rooms (OTA and SWM combined)
     
  2. curt8403

    curt8403 Hall Of Fame

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    Dec 27, 2007
    and newbies get confused, and thing that this
    (see thumbnail)
    is equal to a swm
     
  3. hdtvfan0001

    hdtvfan0001 Well-Known Member

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    Eat your lunch....you're correct.

    Each SWM* can support 8 HD tuners...actually more if you "merge" in OTA...but that would just complicate matters....:D

    ...and to your point....an SWM8 and a Zinwell Multiswitch are NOT anywhere near the same device or technology....therefore, they handle things totally different from each other.
     
  4. itsmillertime

    itsmillertime New Member

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    Sep 13, 2008
    I just installed a H21-100 HD receiver with only 1 satellite feed to it with an external antenna. I have the slimline 4 output dish with 3 lines used. Can I purchase a splitter for the one line and use it for the DVR then? Or will I need to purchase a multiswitch to split the line for the DVR? I have tried to use the last satellite line with cheaper diplexers with no success. What is the cheapest way to split a line or add one for the DVR connection?
     
  5. jdspencer

    jdspencer Hall Of Fame

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    Nov 7, 2003
    The cheapest and only way with your setup is to run another line from the dish to the DVR.

    You could add the SW68 multiswitch to all four lines from the dish and then you'd have 8 outputs to use.

    Diplexers are used to add OTA to a sat signal.
     
  6. itsmillertime

    itsmillertime New Member

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    Sep 13, 2008
    It would seem that running another line to the place would be easy but it is 80 feet away and would need to be run under the house in a 2 foot crawl space. The easiest way would be to install a splitter to the present line - is there a problem in doing this? Would a wide-band splitter be able to do this? My original thought with the diplexer is to run the second signal in with the terrestrial antenna and split them once by the receiver. Are any diplexers made for this bandwidth and capability? I currently have 2 lines to the area from the old cable line and have one of them for the satellite feed and the other one for the terrestrial antenna.

    I don't want to install a multiswitch near the dish for more outputs where the 4 available are plenty for my current needs.
     
  7. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Dec 9, 2006
    Simply put:
    you can't split a non SWM cable from the dish to feed another tuner/receiver.
     
  8. BattleZone

    BattleZone Hall Of Fame

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    Nov 13, 2007
    No it won't. Installers use dual-power-passing splitters to split the lines from the dish to feed multiple multiswitches all the time. It's the same signal, and it isn't lost. If fact, the signal is barely reduced.

    But the problem is that each receiver uses both voltage and a signaling tone to select from one of four banks of transponders. It is impossible for 2 or more banks of transponders to come down the same line, as they use the same frequencies and would interfere with each other (that's why they are SWITCHED in the first place). Also, you can't have two different voltages on the same cable, and you can't have both the presence and the absence of a signaling tone on the same cable.

    Bottom line: outside of the SWM exception, you CANNOT split lines between a multiswitch and multiple tuners, PERIOD.
     
  9. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Dec 9, 2006
    To take this a step further:
    if tuner "a" is tuned to 101 even transponders, it's sending 18 volts and no tone. If this is combined [splitter being used] with tuner "b" that is tuned to 103 odd transponders, it's sending 13 volts and the tone. What the dish will see is the 18 volts and tone for the even transponders off 103/110/119 SATs. Since neither receiver is tuned to the 103/110/119 even transponders, neither of them will get the channels they are tuned to.
    This is why "non SWM" systems are switched, not split.
     
  10. itsmillertime

    itsmillertime New Member

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    Sep 13, 2008
    Thank you for the detailed responses where I learn more about this technology from you experts.

    What about using a diplexer to send the combined antenna and satellite signal together from the sources and using another diplexer to split them near the receiver? This was possible with the original dish setup but can it work with the ku-bands and new slimline dish setup? I have another unused line from the satellite dish but using the old diplexers seemed to block the higher signals. Is there such a thing as a wide-band diplexer?
     
  11. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Dec 9, 2006
    Ku isn't the problem, but Ka-Lo is, since they [the channels] come down the cable in the 250-750 MHz band [OTA band].
     

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