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H20 Install issue

Discussion in 'DIRECTV HD DVR/Receiver Discussion' started by nino2469, Aug 4, 2007.

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  1. Chip Moody

    Chip Moody Legend

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    Jul 31, 2007
    Thanks VOS. I'll probably wait for next month and verify that the new channels fail before calling them. I'm doubting very much that I could spend less than 5 minutes arguing with them on the phone right now and getting a CSR that understands the point and wants to send someone out to "fix what ain't broke - yet"...

    - Chip


     
  2. Chip Moody

    Chip Moody Legend

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    Jul 31, 2007
    So I didn't want to waste time sitting on hold getting bounced around. I figured I might try shooting off an email, and even if I had to volley a bit, it would be far less painful. Here's the response I got on the THIRD reply from D*, after the first two neglected to even mention anything about the multiswitch - the ONLY thing I asked about in the original email:

    So it looks like I'm back to waiting for the new channels to fail before I can get anything done about this. :(

    Here's the weird part, and I'm hoping VOS can shed some light on this. The HD channels I get now only appear in the guide and can only be tuned in if my H20 is set to a 4x4 multiswitch. If I set it to 6x8 - which I've read elsewhere in the forum is what it's supposed to be on - I lose quite a number of HD channels from the guide, nor can I manually tune them in! What's up with that?

    I followed the theory behind how my multiswitch worked back when I had a simple dual LNB dish. I never did find an explanation for the triple LNB. Anyone know where I can get a techie-oriented run down of how the 5 LNB works?

    Thanks,
    - Chip



     
  3. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Dec 9, 2006
    Whether it's a 4x4 or a 6x8 shouldn't really matter unless you need to add the 95 or/and 72.5 dishes [the six over the four]. Here is what the signals are on eack of the four cables to your multi-switch [from the dish multi-switch]

    Polarity ____________RHCP __________LHCP _________RHCP ___________LHCP
    Output _____________13 V DC _________18 V DC _________13 V 22 kHz ______18 V 22 kHz
    Ka-Lo 250 to
    750 MHz ____________99º Odd __________99º Even ________103º Odd _________103º Even

    Ku 950 to 1450
    MHz ________________101º Odd _________101º Even ________119º Odd ________110º/119ºEven

    Ka-Hi 1650 to
    2150 MHz ____________99º Odd _________99º Even _________103º Odd _________103º Even

    The problem seems to be that the older HD was MPEG-2 and came from the Ku band.
    But the MPEG-4 [as you can see] uses higher and lower frequencies [Ka hi & lo]. This is where the switch falls on it's face as I haven't seem specs for it that say "Ka band", just "HD". Maybe some output ports will pass it and others won't [Ka-hi that is] and I'd bet dollars to donuts that it won't pass Ka-lo.
    The receivers don't really care if their set to 4x4 or 6x8 for the 3/5LNB dish, since they are going to send one of the voltages and tone if needed. It's the other dishes that the receiver needs to send different control signals to for the multi-switch to select them.
    There are 6x8 multi-switches and then there are 6x8 wide band multi-switches [Zinwell WB68].
     
  4. Chip Moody

    Chip Moody Legend

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    Jul 31, 2007
    Ah... I don't think it ever occured to me that there was a multiswitch of it's own at the dish - now it makes a lot more sense.

    Thanks for all the info, VOS - good stuff to know...

    - Chip


     
  5. ChemDoctor

    ChemDoctor Cool Member

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    Aug 14, 2007
    After much troubleshooting, I believe I've narrowed down the problem to a bad connection to the LNB unit on the SlimLine dish. When I switched to a different one (of the four) connectors to the dish, a signal magically appeared. Setup is going well so far; most signals in the mid-90's. WooHoo!

    Thanks again for the suggestions.
     
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