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Is there dangerous voltage off DirecTV swm ports

Discussion in 'DIRECTV Connected Home' started by cypherx, Jun 20, 2014.

  1. cypherx

    cypherx Hall Of Fame

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    Just curious if theres dangerous voltage (not to humans, but to elecronics) on a DirecTV swm port.

    For example, say you have a green labeled 8 way feeding 8 rooms, and a cable splitter feeding a few rooms. In a room with both feeds, if you accidently connect the coax jack from the DirecTV to a tuner, would it blow the tuner out?

    Or is just the first, red port the only port able to pass voltage. I know I could break out the multimeter and measure myself, but I don't have that out right now.
     
  2. litzdog911

    litzdog911 DIRECTV A-Team DBSTalk Club

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    No, you won't damage anything do this. Only the "power passing" port passes the SWM power supply (typically 21-29V). And even that voltage won't hurt anything.
     
  3. veryoldschool

    veryoldschool Lifetime Achiever DBSTalk Club

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    Basically the only way you can screw up is to connect the PI BACKWARDS!!!!!!!!!!!!!!!!!!
     
  4. armophob

    armophob Difficulty Concen........ DBSTalk Club

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    But do be careful when connecting the coax. I have tapped the center connector on the outer shield once and blew a PI.
    No dangerous fire or anything. Just a quick spark and it was dead.
     
  5. peds48

    peds48 DIRECTV A-Team DBSTalk Club

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    If you connect a cable that is feeding power to the dish to a tuner you can damage the that tuner.
     
  6. P Smith

    P Smith Mr. FixAnything

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    BS, all receiver's inputs have Zener diodes to prevent OV
     
  7. veryoldschool

    veryoldschool Lifetime Achiever DBSTalk Club

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    No they don't!!!!!!
    During testing a HR20 was literally "smoked" by a PI connected backwards.
     
  8. P Smith

    P Smith Mr. FixAnything

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    that's HR20 ... tell that its HW designers
     
  9. gov

    gov Legend

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    I zapped a balun on a TV antenna by connecting the antenna lead to a PI. (not that I make many mistakes)

    I suspect a PI output connected to quite a few items might cause a problem, modulators, RF amps, UHF/VHF combiner/splitters. I'm not going to finance research into this, the $1 balun was a severe enough hit for me.

    :coffee
     
  10. cypherx

    cypherx Hall Of Fame

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    Good information, thanks guys!
     
  11. litzdog911

    litzdog911 DIRECTV A-Team DBSTalk Club

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    You're welcome!
     
  12. harsh

    harsh Beware the Attack Basset

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    The HR20's designers are not the ones making false claims about their product.
     

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