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What's the main cause of pixelization?

Discussion in 'DIRECTV HD DVR/Receiver Discussion' started by dlt4, Aug 18, 2008.

  1. GregM5

    GregM5 Mentor

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    Feb 17, 2007
    Do you only get pixelization on the MPEG4 channels, or on all channels?
     
  2. tomparker

    tomparker Cool Member

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    Dec 9, 2007
    Greg, the 0s stay constant.

    The tech left muttering at Directv, feeling that they weren't giving him the answers e sought.

    He made a couple of interesting finds:
    245 TNTHD gives a 771 message, but the channel shows up fine on 75
    206 ESPNHD gives a 771 message, but is fine on 73
    209 ESPN2HD is 771 message but is fine on 72
     
  3. jacksonm30354

    jacksonm30354 Icon

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    Mar 29, 2007
    Atlanta
    That is because your signal levels on 99c are way too low or 0. Those channels are no longer the same with a different channel number. channels in the 70's are MPEG-2 and come from satellites at 110/119 and 245,206, and 209 are on the new 99c (the new D11 satellite).

    He needs to come back and realign to get good signals on 99.
     
  4. dlt4

    dlt4 Godfather

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    Oct 4, 2006
    Florida
    I'm not up-to-date on which channels are MPEG4 and which aren't. Some of the channels affected are Food, HGTV, Smithsonian, MGMHD, A&E, USA, and even a couple of the locals.
     
  5. K4SMX

    K4SMX Hall Of Fame

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    May 19, 2007
    He got plenty of signals on 101 and 119 only, which is all he can check. Your readings are rather peculiar. Assuming the "new" LNB actually works correctly, I wonder what "checked the multi-switch" actually means? Did he bypass it, connecting your HR20-700 directly to two of the dish lines? You should do this yourself with a couple of double-female "barrel" adapters. Let's see what those 99(c)'s are when you're connected directly to the dish. We need to confirm his work re: the multi-switch.

    Next we'll talk about the tilt.
     
  6. bonscott87

    bonscott87 Cutting Edge: ECHELON '07

    9,809
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    Jan 21, 2003
    ALL HD is in MPEG4 and comes from the 99 or 103 satellites. Only exceptions are the few HD channels still in MPEG2 in the 70s-90s (but they all now have MPEG4 versions on the new sats).
     
  7. GregM5

    GregM5 Mentor

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    Feb 17, 2007
    Scott beat me to it ;)
     
  8. GregM5

    GregM5 Mentor

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    Feb 17, 2007
    The HD channels in the 70's are MPEG2, the other HD channels (including most locals) are MPEG4.

    It sounds like a dish alignment problem since the 0's are constant.
     
  9. dlt4

    dlt4 Godfather

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    Oct 4, 2006
    Florida
    I saw pixelization again today at mid-afternoon on the usual channels, but only for about 5 minutes. It happened as soon as I turned on the receiver, so I was thinking perhaps it had a problem getting "warmed up", so to speak. But my wife said she's seen it do it after it's been on for at least 30 minutes. If it only lasted for 5 minutes in the middle of the day I wouldn't be worried about it.

    I checked signal strengths again on 99(c) and 103(c) and they are almost all in the 80s, with a couple of upper 70s and low 90s. The only 0s were on 103(c), transponders 17 and 22, but I think that's normal isn't it?
     
  10. GregM5

    GregM5 Mentor

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    Feb 17, 2007
    dlt4, we've been having similar (so far unresolved) pixelization issues with our HR20-700's. DTV is sending out 2 HR21 Pro's (with AM21's) to replace the HR20's and I will post the results if it resolves the problem. The thread is located here:


    http://www.dbstalk.com/showthread.php?t=136566
     
  11. dlt4

    dlt4 Godfather

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    Oct 4, 2006
    Florida
    Thanks for the info Greg!
     
  12. bonscott87

    bonscott87 Cutting Edge: ECHELON '07

    9,809
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    Jan 21, 2003
    Are you near and airport or military base by chance? I remember a while back someone with a similar issue someone had and it turned out the local airport did some sort of radar test (or something) around the same time every day and it would cause interference with not only his TV viewing but his cordless phone. He lived within a half mile or so of the airport radar tower.
     
  13. dlt4

    dlt4 Godfather

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    Oct 4, 2006
    Florida
    I live in the Phoenix metro area, but I'm about 20 miles from the airport. There is a smaller airport about 4 or 5 miles away. Interesting point, though. I'll take note if it happens about the same time everyday. Thanks for the info!
     
  14. tomparker

    tomparker Cool Member

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    Dec 9, 2007
    So Directv called back today, found out the installation wasn't effective at picking up the new MPEG 4 birds and we chatted a bit. Turns out the don't have gear to actually tune in 99 or 103 - they figure that once they've dialed in 101 they're good to go.

    Does that sound goofy to anyone else? There isn't a tuner/toner to use at the dish?

    This is where their HD stations are all headed and they can't measure the spot beam? I'm guessing standard procedure had better change soon.

    They're supposed to come out next week and give it another go.
     
  15. houskamp

    houskamp Active Member

    8,636
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    Sep 14, 2006
    Unfortunatly not the 1st under equipped installer..
    Just don't let him leave till 99c and 103c are upper 80s on your reciever..
     
  16. mpar1

    mpar1 AllStar

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    Mar 20, 2008
    I have been experiencing the same problems. yesterday a different installer came out and replaced the LNB plus remounted the dish in a different location and used the correct mast. The other installer didn't replace the mast when he installed the new dish.

    Hopefully that will correct the sporadic pixelation issues.
     
  17. Maruuk

    Maruuk Hall Of Fame

    1,951
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    Dec 4, 2007
    Is this continuous moderate pixelization, or a sudden short-term pixel meltdown of the entire screen which goes away in 10-15 seconds, then reoccurs a few minutes later?
     
  18. mpar1

    mpar1 AllStar

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    Mar 20, 2008
    What I have seen is continuous moderate pixelation on both receivers simultaneously. It can last for a few minutes or hours. And it is not on all HD channels. In none of of the "legacy" HD channels are affected but channels I now get with the HR21 are. No SD channels are affected.
     
  19. K4SMX

    K4SMX Hall Of Fame

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    May 19, 2007
    So with your new dish installation, what are your HD signals like?

    Satellite transponders (14 total at 99º(c)/(a))
    [New national HD channels]
    1-8 # # # # # # # #
    9-16 # # # # # # NA NA

    Satellite transponders (14 total at 103º(c)/(b))
    [Most national HD channels]
    1-8 # # # # # # # #
    9-16 # # # # # # NA NA
    17-24 0 NA NA NA NA 0 NA NA
     
  20. mpar1

    mpar1 AllStar

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    Mar 20, 2008

    Satellite transponders (14 total at 99º(c)/(a))
    [New national HD channels]
    1-8 85 94 80 89 85 90 83 89
    9-16 87 89 85 88 91 92 NA NA

    (Similar for tuners 1 and 2)

    Satellite transponders (14 total at 103º(c)/(b))
    [Most national HD channels]
    1-8 86 89 82 89 80 87 79 88
    9-16 80 86 80 88 82 89 NA NA
    17-24 0 NA NA NA NA 0 NA NA

    (Similar for tuners 1 and 2)

    Any thoughts?

    When I am (hopefully was) getting the pixelation, 99(c) was still similar. 103(c) would drop into the 70s on tuner 1 and see tuner 2 go down into the 60s for half and 0 for half.

    So, same dish, new LNB and new mount position on my house. Let's hope that resolves the issue. I recorded a number of shows and have seen nothing so far. I am crossing my fingers that this is resolved as my local HD channels are scheduled to roll out next month.
     

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