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Diplexer issue

Discussion in 'General DISH™ Discussion' started by kipakipa, Feb 14, 2009.

  1. kipakipa

    kipakipa New Member

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    Feb 14, 2009
    I just installed diplexers so that I could tie in my newly purchased antenna (which is on the roof next to the Dish receiver) and have the OTA signals join the Dish signals in one coax cable. One diplexer is on the roof and combines the antenna and Dish signals into one. Then another diplexer inside splits the signals so that I can route to the Dish tuner and to my HDTV's antenna slot.

    The antenna is working great because I get crisp, clear OTA channels. But when I use my remote to switch over to satellite to view Dish channels, I do not get any channels - the tuner is searching for satellites to get a signal. But as soon as I disconnect the RG9 cable from my HDTV's antenna slot, Dish channels work. So it seems Dish won't work as long as the HDTV is connected to the antenna.

    Has anyone heard of this before? Do I have a faulty diplexer?

    Any help/advice would be appreciated. I can't imagine the usefullness of manually connecting and unconnecting the RG9 cable to my HDTV's antenna slot to switch from Dish to OTA. - Thanks.
    Paul.
     
  2. BattleZone

    BattleZone Hall Of Fame

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    Nov 13, 2007
    Either it's a bad diplexer or you've got them hooked up wrong. It isn't difficult to mix up your connections and end up feeding the diplexer the wrong way.

    [​IMG]
     
  3. boba

    boba Hall Of Fame

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    May 23, 2003
    Make sure the side labeled sat goes to satellite and the antenna side goes to the antenna.
     
  4. TSR

    TSR Legend

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    Feb 7, 2009
    It's good that you know to use diplexors in pairs, but make sure it isn't upside down, look at the feed ports (labels) and make sure it's correct. You shouldn't have a faulty diplexor, it would be incredibly rare in my experience.
     
  5. kipakipa

    kipakipa New Member

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    Feb 14, 2009
    Thanks IIP and Boba. I have double checked and it is set-up correctly.

    While the TV is on and I am watching Dish Network, as soon as I connect the off-air antenna line to my TV, the satellite signal disappears and the TV makes a weird 'whaaawhaaa' sound. Weird.
     
  6. Mr-Rick

    Mr-Rick Legend

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    Nov 30, 2004
    Do you have a powered amplifier for your antenna on the same diplexed line? If so, remove it.
     
  7. kipakipa

    kipakipa New Member

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    Feb 14, 2009
    Mr. Rick - No I don't have it amplified.

    Does it matter at all that the OTA antenna is picking up digital signals and the Dish Network I have is not digital (I don't have a digital tuner)? Stupid question I'm sure.
     
  8. ka8zay

    ka8zay AllStar

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    Feb 11, 2009
    It sounds like you are using Splitters and not Diplexers, that once you connect the Antenna feed your causing a short. If your sure they are Diplexers then they have to be bad.
     
  9. kipakipa

    kipakipa New Member

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    Feb 14, 2009
    ka8zay, I did get diplexers. One thing that I noticed though, when I connect the antenna feed to my TV, there is a small spark. Is that a short?
     
  10. ka8zay

    ka8zay AllStar

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    Feb 11, 2009
    There should not be a "spark" when you connect the antenna feed, that tells you that the DC power is passing to the TV side from the receiver where it should not be. They must be bad which as said before is very uncommon, what brand are they?
     
  11. kipakipa

    kipakipa New Member

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    Feb 14, 2009
    They are Paladin Tools. I picked them up from Fry's Electronics (a mega-electronics store out here). I just noticed a small sticker on ONE of the boxes that the diplexers came in. The sticker says, "This product may be an open box, may have been used and returned by a customer, or may have been repaired by an authorized service provider."!!!! I think I need to return these for two other ones.
     
  12. ka8zay

    ka8zay AllStar

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    Feb 11, 2009
    Agreed, let us know how the new ones work out.
     
  13. kipakipa

    kipakipa New Member

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    Feb 14, 2009
    Thanks. I will be sure to post the outcome.
     
  14. Rduce

    Rduce Legend

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    May 15, 2008
    Holland Electronics makes very reliable diplexers IMHO.
     
  15. timhk

    timhk Mentor

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    Sep 26, 2007
    How would you set up a VIP722 with a single sat lead separating to the DISH tuners 1&2 and then have a OTA lead feeding also? In simple English splitting the combined(OTA+SAT) lead from outside into 3 inside feeds of 2 Sat tuners & 1 OTA tuner.:grin::confused:
     
  16. timhk

    timhk Mentor

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    Sep 26, 2007
    Would also like to add that there is Channel Master preamp installed on the antenna.
     
  17. BattleZone

    BattleZone Hall Of Fame

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    Nov 13, 2007
    It would look just like the diagram I posted, with the sat output of the diplexer feeding the input of the DPP Separator. The two legs of the separator feed the two sat inputs of the Dish receiver.

    NOTE: if you do this, you cannot also diplex the TV2 output into the same line, as is frequently done. If you aren't using the TV2, or have a line running directly from the receiver to the TV2, you're all good.
     

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