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Repeated SWiM failures

Discussion in 'DIRECTV Installation/MDU Discussion' started by bdodds, Dec 19, 2011.

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  1. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    The SWM8 PIs clearly had more room, as they are used for the SWiM-16 for the last year or so, but they also "bumped" the amps up a ¼ amp.
    "I'd think" if they had enough power for two SWiM-16s, that they would have used them on the SWiM-32, but they don't.
     
  2. DarkLogix

    DarkLogix Godfather

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    What I would do and I know others might not is one of the following

    1. bond the ground rods of the 2 houses (ie run a 4 or 0 gauge wire between the 2 ground rods) then you should be safe to use a grounding block in the normal way

    2. stop sharing the dish

    with 2 differant homes sharing a dish you're linking the grounds through the coax and it will find a lower potential differance to go to

    when running copper between differant grounding systems they need to be bonded so that data link doesn't become the bond

    having a cable not ment for grounding link to differant grounds is just asking for trouble
    also I would get a polization locker (put it before the splitters that split the 2 locations) and ensure that he has some multiswitch
     
  3. lugnutathome

    lugnutathome Hall Of Fame

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    This caused me to check mine and it's part of a SonoraDesigns kit with a 2 amp 24v designed (per their marketing blurbs) for dual SWMs the kit includes a 2 way splitter for doing just that. Runs barely warm in my set up.

    As to the 32, I get the impression that there is more going on besides just in essence 2 swm 16s well actually yes as it does the cascading internally and I'd bet that is amplified in itself. Perhaps its such I would not need the equalizer/amplifier/polarity locker as I need for my run to the cascade splitters so I get that having its own unique PI instead my dual PIs one for the sat feed to cascade point processing and the other for my SWMs.

    My big question about the 32 is that it would seem to be an MDU piece cause the literature seems to indicate the 2 "16"s are in fact isolated from one another and not a single DECA cloud device...

    Don "sorry if that wanders the topic here" Bolton
     
  4. DarkLogix

    DarkLogix Godfather

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    the SWM32 is more of 4x SWM8's not 2x SWM16's

    the 4 SWM ports on it are all isolated (per VOS)

    as you already have a equalizer/amplifier/polarity locker I'd keep using them, what could it hurt (well the amp might make the signal to strong)

    though the SWM32 might be perfect for that one user that has 28tuners and does OTA diplexing with full ethernet connections, however due to the cost and loow use of it you're unlikely to fine one at an awsome price on e-bay or I'd have one just for the overkill
     
  5. Stuart Sweet

    Stuart Sweet The Shadow Knows!

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    Yes, that is correct.
     
  6. dsw2112

    dsw2112 Always Searching

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    What kind of splitters are used here (power passing on one leg, diode steered, etc?) If they're power passing on one leg, who is supplying the power (you or the neighbor?) It would also be helpful to know what the neighbor has connected to their four lines.
     
  7. dsw2112

    dsw2112 Always Searching

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    The SWM8 is a polarity locker. The more important question is the type of splitters used at the dish to see "who" is really powering the LNB.
     
  8. DarkLogix

    DarkLogix Godfather

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    however
    the 4x 2way splitters are inbetween the dish and the SWM8 so if the switch or whatever the neighbor has is calling for a differant polarity than the SWM8 on one coax then there could be issues, unless the 4x 2ways are such that and polarity change from the neighbor would be blocked

    it looks like you've missed parts of the thread

    the SWM8 is only for the OP's stuff so he's powering it
    then there are 4 coaxes going to the nieghbor in parralel to the swm8 to unknown setup
     
  9. dsw2112

    dsw2112 Always Searching

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    I haven't missed anything ;) and a polarity locker does not need to go "before the splitters..."

    The important question is the type of splitters, and where the power passing port is located. If the SWM8 is on the power passing ports then it's irrellevent what the neighbor's receivers are "calling" for (as the SWM8 is functioning as the polarity locker.) It is imortant to know what "switch" the neighbor is using as well.
     
  10. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Reading the OP's first post "suggests" this has been working fine for years, so the four coax have been "matched" or there would have been tuning problems long ago.
     
  11. DarkLogix

    DarkLogix Godfather

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    ok
    well still looks to me that the coax is getting wrongly used as a ground bond between homes

    a proper grounding bond should be put in to ensure that the grounds are leveled and that differant ground voltage isn't causing current on the coax
     
  12. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    This is kind of the problem with the internet. [not blaming you at all].
    We don't know squat about what is really going on, yet we all try to offer help "blindly".
     
  13. dsw2112

    dsw2112 Always Searching

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    "It's possible", but how did you come to that conclusion? It doesn't appear that the OP has a ground connection on his side, and the coax shield is not tied to the receiver electrical plug (unless it's a three prong); thus the coax is likely not tied to electrical ground on OP's side. If that's the case, the coax is not being utilized as a ground bond between homes. We'd really need more info on the complete system setup before deciding to bond the ground connections...
     
  14. DarkLogix

    DarkLogix Godfather

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    from what he's said

    1. its not grounded
    2. 2 homes are using the same dish

    2 homes are each going to have differant ground voltages (although ground is looked at as 0 its only relative and 2 differant grounds when connected to each other can have current between them)

    as it only happens in the really cold, when air is thus drier and static charges can build up more, it might be the issue

    I know I'd talked to someone before that was long ago running networking cable between buildings at a college and on connecting a cable to a transiver it arced and blew out the transciver (the solution as fiber was not common yet) was to drive in a ton of ground rods and bond the buildings together, thus why its not code to connect non-power connections between buildings (there might be some distance spec in there)

    so having low voltage cableing linking 2 buildings without electricaly bonding their grounds your asking for trouble as the ground current might be low volt very high amp power and can fry things

    sure its possible the grounding issue isn't the cause but with such a major code violation that has the ability to fry things it should be fixed and it might solve the problem or narrow down the causes
     
  15. DarkLogix

    DarkLogix Godfather

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    its not grounded as far as we know its not grounded at the nieghbor's ether

    so the coax could be finding any number of paths to ground none of which are good without having a safe path
     
  16. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    It could be due to sun spots too for all we know.

    Guys, it time to take a step back and wait cause you all don't know nothin. ;)
     
  17. dsw2112

    dsw2112 Always Searching

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    Ugghh...this is turning into a grounding thread....

    I think you missed my point. The OP's side isn't grounded, so the coax isn't bonding the two homes together. The coaxial shielding is not tied to an electrical ground point in the receiver. In closing; one neighbor should ground dish, and this will be sufficient (and not cause problems between homes.)
     
  18. dsw2112

    dsw2112 Always Searching

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    Where are these ground paths?
     
  19. dsw2112

    dsw2112 Always Searching

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    Yep, there's a lot that's unkown. Just trying to figure out how an ungrounded coax can be an electrical bond between homes :lol:
     
  20. DarkLogix

    DarkLogix Godfather

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    and possibily have a TV provide a bond that shouldn't be?
    grounding one side would remove the static build up but then your left with current on the sheild
     

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