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Installation Riddle with SL3 Multiswitch system

Discussion in 'DIRECTV Installation/MDU Discussion' started by davedusz, Nov 12, 2012.

  1. davedusz

    davedusz Cool Member

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    Oct 3, 2008
    OK, here's the riddle, see if you can help me solve it.

    I have two systems -- a legacy system, and a H21 receiver hooked up to an SL3 dish with 4-output multi-switch. Since the two dishes are near each other, I can connect either receiver to either dish.

    Follow closely:

    1. I can hook the legacy receiver to the legacy dish -- no problems
    2. I can hook the H21 receiver to the legacy dish -- no problems
    3. I can hook the legacy receiver to the SL3 dish -- no problems
    4. If I hook the H21 receiver to the SL3 dish -- "Searching for signal"

    It's not an SL3 dish alignment problem, right? The legacy receiver has a strong signal on the 101 in #3 above.

    Can it be the H21? It works fine connected the legacy dish.

    The H21 used to work fine on the SL3, but one day I turned it on and got "searching for signal". Since then, for the last several weeks, this riddle has baffled me.

    I called directv and they walked me through several things, repeating set-ups, resetting the H21, etc, and said "it's not getting a signal, must be the dish alignment". Yea, but look at point #3 above.

    When I hook the H21 up to the SL3, I tell the receiver that I'm now using an SL3 multiswitch, and immediately it can't find a signal. When I look at signal strengths, nothing on the 101.

    What could it be? The B-Band converter? Does the B-Band converter affect the 101, or just HD sats? In #2 above the B-Band converter is still in place.

    Dave
     
  2. damondlt

    damondlt New Member

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    Feb 27, 2006
    Newfoundland...
    Are you on an SD channel(101) when checking your H21 using the slimline 3 LNB?, cause if your on an HD channel it sounds like it not seeing the 99 or 103.
    Your legacy receiver would never pick that up, so if your 101 is good you would never know the difference.

    Go to settings on H21 and see and state your signal strengths. While hooked up to slimline 3. Could be a faulty LNB could be alinement issue.
     
  3. davedusz

    davedusz Cool Member

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    Oct 3, 2008
    I cannot even get SD signals from the 101 when the H21 is connected to the SL3.

    I get zeros on all readings from all satellites.

    I have actually tried a new LNB, but no difference -- and remember, the SL3 does work when connected to the legacy receiver.
     
  4. P Smith

    P Smith Mr. FixAnything

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    Jul 25, 2002
    Mediterranea...
    2 and 4: are you using same cable ? and particular same F-connector ?
     
  5. Floyd

    Floyd Legend

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    Nov 9, 2004
    Did you remove the baseband converter when trying the SL3 dish?

    Did you read the signal strength for other sats when using the H21 in SWM mode?

    Are you using a SWM power supply with the SL3?
     
  6. Ken Stomski

    Ken Stomski Mentor

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    Nov 17, 2011
    you dont use a swm power supply with a sl3 lnb. an h21 with an sl3 would require a b-band converter.
     
  7. cwtech

    cwtech Mentor

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    Oct 12, 2012
    only variable your not giving us is the use of the b-band converter. have you tried hooking the cable from the sl3 directly to the h21 and checking the signal on 101? are you using the b-band converter on the legacy dish?

    Just from the info you are giving us, and the info that i am "assuming", I would say that you have a bad b-band converter.
     
  8. davedusz

    davedusz Cool Member

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    Oct 3, 2008
    Regarding the b-band converter...

    The H21 works fine on the legacy dish with the B-Band converter in place (101 only of course).

    The H21 connected to the SL3 does not give any signal readings (101, 99, or 103) with or without the B-Band converter in place.

    I am not using SWM, but rather a 4-connector multi-switch LNB.
     
  9. dielray

    dielray Legend

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    Aug 5, 2009
    What happens if you connect the standard receiver to the Ka/Ku, go into the signal meter screen selecting an even transponder, and then plug the H21 into the Ka/Ku?

    How is the switching between the dishes done? Is the entire run switched at the LNB or is some portion of the line dependent on the dish used?
     
  10. jimmie57

    jimmie57 Hall Of Fame

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    Jun 26, 2010
    Texas City, TX
    What do you get if you leave the dish setting to the 18" round dish ?

    Are you choosing Multiswitch first and then the dish choice ?

    If you repeat the sat setup is is still selected for the slimline 3 and multiswitch ?

    When you get the Searching for Satellite Signal, what is the error code number it gives with that ?
     
  11. davedusz

    davedusz Cool Member

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    Oct 3, 2008
    I believe it was 771
     
  12. davedusz

    davedusz Cool Member

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    Oct 3, 2008
    I don't think my legacy receiver allows me to choose transponders at the meter screen.

    Both receivers have a home run to the respective dishes. Since the dishes are side by side, I disconnect the home runs at the LNB's and switch them there
     
  13. dielray

    dielray Legend

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    Aug 5, 2009
    The standard receiver would have a signal meter, but how to get into it varies by the model.

    What happens when you plug both into the Ka/Ku(standard first)? Does the H21 get odd transponders only?

    This is still a little confusing. Just to clarify, each receiver has 1 run to the location the dishes are and not a run to each respective dish, correct?
     
  14. davedusz

    davedusz Cool Member

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    Oct 3, 2008
    OK, new information.

    Finally this weekend I found a way to get the H21 to work on the SL3 dish, and the answer is that just like on the legacy dish, the H21 will get a sat signal if the legacy receiver is also plugged up to that same SL3 dish.


    Said another way -- the H21 receiver will work on either the legacy dish or the slimline 3 dish IF the legacy receiver (or presumably any other receiver) is also plugged into that same dish! If you disconnect the legacy receiver from whichever dish, the H21 receiver says "searching for signal".

    Experts -- what does that tell you? Is there a problem with the DC voltage carried out to the LNB by the H21?

    Dave
     
  15. veryoldschool

    veryoldschool Lifetime Achiever DBSTalk Club

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    Dec 9, 2006
    If a receiver will only get a signal if another receiver is connected, it does sound like a voltage problem. What happens if the "powering" receiver changes channels?
    "In theory" the one powering should be able to change either voltage or the tone on/off and the one that wasn't working should either also change or go to searching for signal again.

    Maybe a simpler test is go to the one that had problems and check the SAT levels on all the tps from each SAT.
     
  16. i3rown

    i3rown AllStar

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    Sep 3, 2011
    Sounds like a voltage switching issue in the lnb, sounds like a new Kaku is in your future.
     
  17. Ken Stomski

    Ken Stomski Mentor

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    Nov 17, 2011
    I had a similar problem in a head end system and it ended up being a bad cable going into the sat in on the receiver in question.
     
  18. davedusz

    davedusz Cool Member

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    Oct 3, 2008
    On the H21, nothing "apparent" happens when the "powering" receiver either changes channels or turns off.

    For the non-powering receiver, I'm not noticing any missing channels. What would I be looking for on the various transponders?
     
  19. davedusz

    davedusz Cool Member

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    Oct 3, 2008
    Except.....early on when I thought the LNB was the problem I bought a second LNB. Right now I'm using the second LNB. What are the odds that both LNB's are bad? Possible, I guess.
     
  20. i3rown

    i3rown AllStar

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    Sep 3, 2011
    You replaced the Kaku or the 18?
     

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