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Tivo HD Pixelation Troubleshooting

Discussion in 'TiVo Series3 HDTV DVRs' started by Chimpware, Aug 3, 2007.

  1. Jan 1, 2009 #1001 of 1597
    snash22

    snash22 New Member

    42
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    Oct 27, 2007
    The only time I experience very bad pixelization is when there are fast moving scenes.

    Therefore, is it safe to say that it is caused by compression from from cable company, and it is not a problem with my signal, Tivo, or cablecard?
     
  2. Jan 1, 2009 #1002 of 1597
    gresc134

    gresc134 New Member

    7
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    May 28, 2007
    Just installed an HD Tivo and it worked fine with FIOS. The software version I was on was 8. xx ? I tried to get You Tube and realized it needed an upgrade. So, I rebooted the Tivo and it went out an upgraded to 11.0-01-2-652 and now I've got Pixelation on every channel. Signal Strength = 100, SNR between 37 and 38. RS U/C 0 and 2.
    So, I really don't see this as a FIOS issue. I have fios STB on my other TV and it's fine, and they'll play that card... Has there been talk of a Tivo software upgrade ?
     
  3. Jan 1, 2009 #1003 of 1597
    esb1981

    esb1981 New Member

    121
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    Dec 2, 2007
    Connecticut
    Exegesis, I really feel for you with the frustration. Things that have helped me moderately at times were: putting attenuators on the line to spring the signal down a bit; and maybe adding a tilt compensator (a.k.a. signal equalizer) to attenuate just the analog channels at low frequencies (high signal tilt could overload the tuners and cause problems at higher frequencies).

    A theory I have had that I haven't tested is removing an amplifier. If you have an amplifier at the house, you could try taking that out of the picture and removing some splitters to make sure you have a strong/clean signal, and then test the channels.

    Good luck. :(
     
  4. Jan 1, 2009 #1004 of 1597
    gresc134

    gresc134 New Member

    7
    0
    May 28, 2007
    Thanks esb1981 ; fios is all digital. So really no options for playing w/analog. I also gave the STB back to Verizon. No amp on the line. Maybe I'll try adding an attenuator. Still, feel that this is a Tivo issue.
     
  5. Jan 1, 2009 #1005 of 1597
    esb1981

    esb1981 New Member

    121
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    Dec 2, 2007
    Connecticut
    greg, since you're Fios, there are some specific Fios fixes people have. Some recommend attenuating your signal until the SNR is 31 (I think there's another thread on this forum titled "Fios - attenuate to snr 31." Other's have had success adding a low-pass filter or satelite diplexer to remove high-frequency signals from the line since sometimes the internet signal seems to disrupt the TV signal. You can pick up a diplexer from Lowe's for about $11. You can get a pack of attenuators from smarthome.com for $10-$20, I think.
     
  6. Jan 1, 2009 #1006 of 1597
  7. Jan 1, 2009 #1007 of 1597
    gresc134

    gresc134 New Member

    7
    0
    May 28, 2007
    ok thanks everyone ; I'll give both a try.
     
  8. Jan 2, 2009 #1008 of 1597
    gresc134

    gresc134 New Member

    7
    0
    May 28, 2007
    ok picked up a diplexer (Tivo suggested I do this) and that didn't work, spent $27 on a 75ohm terminator and diplexer; now going to drop $23 on attenuators and shipping. Anyway, signal Strength is still 100 but fluctuates a bit now. SNR still between 37 and 38 but was as low as 34.

    One thing I noticed was that if I record another channel and watch another (now on the second tuner) the pixelation stops. I guess I'll get an antenuator but the Tivo guy didn't seem to think that would work.
    This is really annoying and now my wife is like "let's just use the old tivo" (series 2) - great !
     
  9. Jan 2, 2009 #1009 of 1597
    rickwagner50

    rickwagner50 New Member

    20
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    Jun 30, 2008
    I had the same issue. It turned out I had one bad cablecard. Something to think about. Verizon replaced mine free of charge.
     
  10. Jan 2, 2009 #1010 of 1597
    gresc134

    gresc134 New Member

    7
    0
    May 28, 2007
    Thanks rickwagner50 ; I'm going to try that next...
     
  11. Jan 3, 2009 #1011 of 1597
    wm2008

    wm2008 New Member

    62
    0
    Jan 2, 2009
    Hi, I'm having this issue with two Tivo HDs also. Lots of pixelation especially on channels like Speed and HD Theater. My Verizon DVR doesn't have any problems. Tivo support has not been too helpful and neither has Verizon. Tivo told me tonight to put some splitters in to reduce the signal, but some of the channels already have low signal strength.

    Is there any real clear path forward? I'd be willing to spend something to get a solution that works, but it's really getting bad and unless I can get a fix I need to abandon the Tivos. This is on Fios. I'm not sure how much longer I can take the pixelation and family complaining. Tivo keeps blaming Verizon and Verizon keeps blaming Tivo. But the Verizon DVR has never had a problem. I just don't really like it, but it works very reliably.
     
  12. Jan 3, 2009 #1012 of 1597
    Flyinace2000

    Flyinace2000 New Member

    234
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    Aug 2, 2005
    The information in this thread is good but hard to get to. Does this forum support wikiposts? If not a wiki should be set up somewhere to better disseminate this information.
     
  13. Jan 3, 2009 #1013 of 1597
    bkdtv

    bkdtv New Member

    7,902
    0
    Jan 9, 2003
    DC Metro Area
    wm2008,

    Grab yourself a -10dB attenuator and screw it onto the end of your coax. That should eliminate the problem for most newer FiOS installs using the latest ONTs.

    Verizon installers have these attenuators (free) and they can also be ordered from smarthome.com. If you are going to order them yourself and pay the shipping, I would probably get at least a 3, 6, and a 10. You can't be certain exactly how much you'll need. If you have more than one TivoHD, order the variety pack.
     
  14. Jan 3, 2009 #1014 of 1597
    aaronwt

    aaronwt UHD Addict

    19,194
    27
    Jan 31, 2002
    Northern...
    You can also get a variable attenuator from Rat Shack.
     
  15. Jan 3, 2009 #1015 of 1597
    21364guy

    21364guy New Member

    52
    0
    Oct 20, 2007
    If you knock the SNR down to 31 or 32 you should be good. In my case, with the diplexer and attenuators I rarely if ever see pixelation any more.
     
  16. Jan 3, 2009 #1016 of 1597
    richsadams

    richsadams Active Member

    8,893
    2
    Jan 4, 2003
    That's almost exactly the advice a FIOS installer gave me when he was doing an install in a nearby house about a month ago.
     
  17. Jan 4, 2009 #1017 of 1597
    proudx

    proudx New Member

    198
    0
    Sep 16, 2008
    ota signal strength 92 to 100 pixelation on bottom half of screen from time to time. ideas?
     
  18. Jan 5, 2009 #1018 of 1597
    esb1981

    esb1981 New Member

    121
    0
    Dec 2, 2007
    Connecticut
    Are you getting RS Uncorrected errors?
     
  19. Jan 5, 2009 #1019 of 1597
    wm2008

    wm2008 New Member

    62
    0
    Jan 2, 2009
    Thanks, but a question. Even going to the smarthome site it says that it doesn't always solve the problem. Plus, it leads me to believe that a "hot" signal causes the issue.

    In my case (with both THDs) I can have the signal strength meter up showing 60-80 and pixelation still happens. For example, HDT was on last week. Peak signal was 94. But, signal strength mainly stayed between 65-80. Even when it was not high, pixelation happened. It doesn't seem to correspond to what the low pass filters or attenuators would fix, does it?
     
  20. Jan 5, 2009 #1020 of 1597
    bkdtv

    bkdtv New Member

    7,902
    0
    Jan 9, 2003
    DC Metro Area
    That's exactly the behavior -- a non-stable signal that alternates across a wide range -- you see when the TiVo is overpowered by a "hot" (too strong) signal.

    On the channels that exhibited pixelization for me before the attenuator, my signal would constantly alternate between 30-50 and 80-95. Once the -10dB attenuator was added to the cable, I got a constant 99-100 on those channels, and 92-95 on most of the others. Since adding the attenuator, there little to no variation in reported signal levels.
     

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