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Roamio OTA problem

Discussion in 'TiVo Roamio DVRs' started by Adam C., Sep 5, 2018.

  1. Sep 5, 2018 #1 of 10
    Adam C.

    Adam C. New Member

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    Jul 24, 2017
    I have been using a Roamio OTA now for about 18 months. Lately I have been noticing 2 channels that have significant pixelation. Signal strength is 100%. My first thought was maybe a bad connection somewhere but everything checks out. I disconnect my coax from the Roamio and plugged it directly into the TV and those channels are perfectly fine with no pixelation. The problem always occurs on RF3 and RF13 (no problems with RF7, RF11, etc.) I'm getting RS Uncorrected values in the thousands and SNR is steady at 29db. Could this be a sign of a bad tuner?
     
  2. Sep 5, 2018 #2 of 10
    snerd

    snerd Active Member

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    Jun 6, 2008
    SNR of 29dB is pretty low. How does that compare to other channels that have good reception?
     
  3. Sep 5, 2018 #3 of 10
    Adam C.

    Adam C. New Member

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    Jul 24, 2017
    29dB is the highest SNR I'm getting on any channel. I have never had any pixelation or reception issues on any of the other channels I watch. As I mentioned, if I plug the antenna directly into the TV I don't see any pixelation on the 2 "bad" channels, so there has to be something going on with the Roamio.
     
  4. Sep 5, 2018 #4 of 10
    JoeKustra

    JoeKustra in the other Alabama TCF Club

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    Ashland, PA...
    Does your TV have signal diagnostics? Sometime a signal of 100% is too strong. It could be 150% but it only displays to 100%. With a Roamio OTA, the AGC circuit will try to limit the signal strength to 72%. You may have a signal that is too strong.
     
  5. Sep 5, 2018 #5 of 10
    Adam C.

    Adam C. New Member

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    Jul 24, 2017
    That's a possible theory. Although my other signals are just as strong and there are no pixelation problems.
     
  6. Sep 5, 2018 #6 of 10
    JoeKustra

    JoeKustra in the other Alabama TCF Club

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    There is 100% , 110%, 150%. It only displays up to 100%.
     
    tampa8 likes this.
  7. Sep 6, 2018 #7 of 10
    Sheffield Steve

    Sheffield Steve Member

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    Jun 11, 2010
    I had the exact same issue and it was that the signal was TOO strong.

    I added a 9db's worth of attenuators and problem solved.

    If you have a splitter try connecting both the TV and Tivo to the antenna and see that helps.
     
    ke3ju likes this.
  8. Sep 9, 2018 #8 of 10
    Adam C.

    Adam C. New Member

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    Jul 24, 2017
    Today I'm noticing a little bit of a different problem on one channel. Every few minutes I'm getting pixelation on the screen, but when I look in the Diagnostics the RS Uncorrected and RS Corrected values both show 0. At first I thought maybe the broadcast itself had the issue, but I turned on a second TV simultaneously (connected to a different antenna) and the pixelation is not there. So what does it mean when there is pixelation but the RS Uncorrected is 0?
     
  9. Sep 9, 2018 #9 of 10
    JoeKustra

    JoeKustra in the other Alabama TCF Club

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    Ashland, PA...
    Possibly there is RS Corrected, which is not counted, yet the bad blocks of content make it the TV. I'm not fluent in 8VSB/OTA. How much attenuation have you added?
     
  10. Adam C.

    Adam C. New Member

    25
    3
    Jul 24, 2017
    I have not added any attenuation yet. Yesterday I went outside and rotated my antenna a few degrees. That seems to have fixed the problem I was having on the other channel. Now I seem to have a new problem on this particular channel.
     

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